Faculty Profiles - Takenobu Suzuki

写真a

Takenobu Suzuki

Organization

Graduate School of Engineering Department of Advanced Science and Technology Materials Science and Engineering Optical Functional Materials Laboratory Associate Professor

Degree

Doctor(Engineering) （ Tokyo Institute of Technology ）

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Contact information

Research Areas

Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Electric and electronic materials
Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Electron device and electronic equipment
Nanotechnology/Materials / Inorganic compounds and inorganic materials chemistry
Nanotechnology/Materials / Inorganic materials and properties

Main research papers

Electronic Structure of Oxygen Dangling Bond in Glassi SiO₂: The Role of Hyperconjugation

Takenobu Suzuki, Linards Skuja, Koichi Kajihara, Masahiro Hirano, Toshio Kamiya, and Hideo Hosono

Phys. Rev. Lett. 90 ( 18 ) 186505-1-4 2003.5.8

Ganapathy Senthil Murugan, and Yasutake Ohishi, Optical properties of tranpsarent Li₂O-Ga₂O₃- SiO₂ glass-ceramics embedding in Ni-doped nanocrystals

Takenobu Suzuki

Appl. Phys. Lett. 86 ( 13 ) 131903-1-3 2005.3.21

Broadband 1400nm emission from Ni²⁺ in zinc-alumino-silicate glass

Takenobu Suzuki and Yasutake Ohishi

Appl. Phys. Lett. 94 ( 19 ) 3804 - 3806 2004.4.29

Spectroscopic investigation of Nd^{3 +}-doped ZBLAN glass for solar-pumped lasers

Takenobu Suzuki, Hiroyuki Kawai, Hiroyuki Nasu, Shintaro Mizuno, Hiroshi Ito, Kazuo Hasegawa, and Yasutake Ohishi

J. Opt. Soc. Am. B 28 ( ８ ) 2001 - 2006 2011.7.22

Ultrabroadband near-infrared emission from Bi-doped Li₂O-Al₂O₃-SiO₂glass

Takenobu Suzuki and Yasutake Ohishi

Appl. Phys. Lett. 88 ( 19 ) 191912-1-3 2006.5.10

Research History

豊田工業大学大学院工学研究科准教授准教授

2007.1
財団法人ファインセラミックスセンター客員研究員客員研究員

2007.1 - 2007.3
財団法人ファインセラミックスセンター研究職

2006.4 - 2006.12
Toyota Technological Institute Graduate School of Engineering Post Doctoral Fellow

2003.4 - 2006.3

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Education

Tokyo Institute of Technology Interdisciplinary Science and Engineering Department of Innovative and Engineered Materials

- 2002

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Country： Japan
Nagoya University Graduate School of Engineering Department of Materials Processing Engineering

- 1998

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Country： Japan
Nagoya University School of Engineering Department of Materials Processing Engineering

- 1996

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Country： Japan

Professional Memberships

American Ceramic Society
Optica
レーザー学会
応用物理学会
日本セラミックス協会
SPIE

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Research theme

Mid-infrared upconversion ghost imaging

鈴木　健伸, DE　CLERMONT　Jonathan, 大石　泰丈

2023

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Mid-infrared upconversion is a technique that shows great potential for obtaining mid-infrared images using visible imaging sensors with outstanding sensitivity, response speed, and resolution. However, the visible light produced after conversion is often weak. To address this issue, this study proposes mid-infrared upconversion ghost imaging and evaluates its feasibility.

Outcome：

2023
We conducted numerical simulations to explore the use of single-wavelength coherent light, single-wavelength incoherent light, and multi-wavelength incoherent light for mid-infrared upconversion ghost imaging. Our findings indicate that the resolution degradation caused by interference is lower when using single-wavelength incoherent light as compared to single-wavelength coherent light. However, distortion can occur when using a multi-wavelength light source due to the difference in magnification for each wavelength during upconversion. We also discovered that image deterioration can be reduced by using a compressed sensing method as an image reconstruction technique.
Development of tellurite glass optical fiber current sensor

鈴木　健伸, DE　CLERMONT　Jonathan, 大石　泰丈

2022

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The importance of real-time current measurement is increasing with the rise in renewable energy generation. Optical fiber current sensors offer advantages such as remote measurement and no risk of electric shock. These sensors use materials with a high Verdet constant and a photoelastic coefficient of zero. Lead silicate glass has been the traditional material of choice, but its use is restricted due to regulations. The objective of this research is to find lead-free tellurite glass that can replace lead silicate glass.

Outcome：

2023
By searching for the glass compositions in TeO₂-ZnO-Li₂O-Bi₂O₃ system glasses, we found glass compositions with lower photorealistic constant than that of conventional glass materials. We fabricated single-mode fibers using these glasses and confirmed the rotation of polarized light by magnetic fields.
Fabrication of specialty optical fibers made of non-silica glass with high infrared transmittance and development of infrared image transmission technique through the optical fibers

DE　CLERMONT　Jonathan, 鈴木　健伸, 大石　泰丈

2021

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Currently, endoscopes that use visible-light imaging fibers are widely used to directly observe the inside of the human body. These tests and surgeries are less invasive for patients. However, the scope of application of endoscopes can be expanded if high-resolution infrared image transmission becomes possible. With infrared imaging, images inside blood vessels and thermography inside the human body can be obtained, leading to new diagnostic and therapeutic methods. Unfortunately, existing image fibers use materials with low infrared transparency, which limits their ability to transmit long-wavelength infrared light with high resolution. Therefore, this research project aims to fabricate an image fiber using a new glass material with high infrared transmittance. The ultimate goal is to achieve high-resolution infrared image transmission.

Outcome：

2023
We succeeded in fabricating a chalcogenide multicore fiber. It was revealed that high-resolution image transmission is possible at a wavelength of 9.3 μm.

2022
In 2017, Stone et al. presented a silica multicore fiber with low index contrast image thanks to a special structure where same sized cores would never be neighbors, decreasing significantly the crosstalk between cores. More recently, Tuan et al. successfully created a long (10cm) all-solid tellurite glass disordered fiber (TDOF) with good image transportation at different wavelength (1.4 to 1.6µm). It is, though, known that the problem of disordered fiber is that image transmission can be distorted due to oversized clusters of fibers of same refractive indices. By coupling these two research, this work tries to find how to obtain better results compared to the TDOF previously reported in view of coupling efficiency or image resolution by using a honeycomb-like network with different sized neighbor cores with controlled randomness.

2021
Programmation for beam pattern evolution of a new fiber structure was made and early interesting results started to appear
Highly nonlinear chalcogenide hybrid microstructured optical fibers with buffer layer and their potential performance of supercontinuum generation

大石　泰丈, 鈴木　健伸

2018

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We report here the design of a new chalcogenide hybrid microstructured optical fiber (HMOF) with a buffer layer around the core and its potential performance of tailoring chromatic dispersion and supercontinuum (SC) generation.

Outcome：

2022
The new chalcogenide HMOF has an AsSe₂ core. The refractive index difference ∆n between the AsSe₂ core and cladding material is supposed to be 0.3. The fiber microstructure and the ∆n between the core and buffer materials are designed in order to obtain broad anomalous dispersion regimes with near-zero and flattened chromatic dispersion profiles for broadband SC generation. Moreover, the suppression of chromatic dispersion fluctuation caused by fiber transverse geometry variation is investigated. By using the proposed chalcogenide buffer-embed HMOFs, the calculation shows that near-zero and flattened anomalous chromatic dispersion regimes from 4.5 µm can be obtained. When the variation of fiber structure occurs for ±1, ±5 and ±10 %, the chromatic dispersion fluctuation can be greatly suppressed. In addition, the calculation shows that a broad SC spectrum from 2.5 to more than 16.0 μm can be obtained when a 0.9-cm-long section of the new chalcogenide buffer-embed HMOF is pumped at 5.0 μm by a femtosecond laser with 1-kW peak power.
Fabrication of an all-solid tellurite disordered optical rod for transverse localization of light

大石　泰丈, 鈴木　健伸

2018

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Here, an all-solid tellurite optical rod with a disordered transverse refractive index profile was first fabricated to study the transverse localization of light.

Outcome：

2023
We have successfully fabricated an air-tellurite glass transversely disordered fiber (TDOF). The cross-sectional area ratio of air to glass is approximately 30%, which is much higher than that of previously reported TDOFs with air-holes. It has been confirmed that optical confinement at a wavelength of 1.5 μm is possible.

2022
In the late 1980s, it was proposed that an optical wave system in which the refractive index profile is random in the transverse plane but is invariant in the longitudinal direction supported the transverse localization of light. The transport of optical images using transverse localization of light and its potential applications in biological and medical imaging were demonstrated by using a polymer optical fiber. The experimental results showed that after a CW probe beam propagated in our 5-cm-long fabricated tellurite optical rod, the beam became localized. With the potential of tellurite glasses such as high nonlinearity, broad transmission window and the control of the refractive index difference, the performance of image transport through a tellurite disordered optical medium by transverse localization of light is expected to improve in the near future.
Effect of third-order dispersion on the coherence properties of supercontinuum spectra

鈴木　健伸, 大石　泰丈

2018

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The effect of third-order dispersion on the coherence properties of supercontinuum spectra has been numerically investigated by solving the generalized nonlinear Schrödinger equation and using the complex degree of coherence theory.

Outcome：

2022
First, the effect of third-order dispersion on the coherence properties of supercontinuum spectra generated by soliton fission and soliton self-frequency shift has been investigated. The results show that if the group velocity dispersion values at the pump wavelength are identical and under the identical pumping conditions, negative third-order dispersion can cause much larger intensity fluctuations and wavelength jitters at the red edge of generated solitons than positive third-order dispersion, resulting in higher coherence degradation. Then the effect of negative third-order dispersion on the coherence properties of supercontinuum spectra generated by soliton fission and soliton self-frequency shift compensation has also been investigated. When at low input laser peak powers, due to the combined effects of modulation instability, negative third-order dispersion and the second zero-dispersion wavelength, the coherence depending on the input laser peak power decreases steeply first and then increases. When at high input laser peak powers, the modulation instability, negative third-order dispersion and soliton collision significantly contribute to the coherence degradation. The second zero-dispersion wavelength cannot stabilize the red-shifted solitons.
Supercontinuum governed by four-wave mixing, stimulated Raman scattering and cross-phase modulation in a birefringent tellurite fiber

大石　泰丈, 鈴木　健伸

2018

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The supercontinuum (SC) generations in a birefringent TeO₂-ZnO-Na₂O-Bi₂O₃ (TZNB) tellurite microstructured optical fiber (BTMOF) have been demonstrated by pumping near the zero-dispersion wavelengths (ZDWs) with a tunable picosecond erbium-doped fiber laser.

Outcome：

2022
When the pump is polarized parallel with the x-axis of the BTMOF, the SC broadening is governed by the four-wave mixing (FWM), stimulated Raman scattering (SRS) and cross-phase modulation (XPM). The FWM signal can be generated from 1538 to 1293 nm, and the idler can be emitted from 1597 to 1907 nm. Due to the high nonlinear property of the BTMOF, the XPM between the FWM signal and idler can be significantly amplified by the cascaded FWM effect. When the pump is polarized parallel with the y-axis of the BTMOF, the SC is broadened by the Stokes and anti-Stokes SRS. A broadest Stokes SRS band with a 10-dB bandwidth of 232 nm is generated by pumping at 1545 nm with an average pump power of 23.8 dBm. Potentially, widely tunable fiber lasers can be developed by exploring the FWM or SRS in highly nonlinear tellurite fibers with tailored dispersion profiles. The SC evolutions agree well with the numerical simulation.
Fabrication and supercontinuum generation in a tellurite hybrid microstructured optical fiber with near-zero and flattened chromatic dispersion control

大石　泰丈, 鈴木　健伸

2018

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Here, we show a broad and flattened SC spectrum with 5-dB spectral flatness over 1060 nm spectral bandwidth by using a 20-cm-long segment of the fabricated tellurite HMOF.

Outcome：

2023
We succeeded in generating single-polarized mid-infrared SC light by controlling the wavelength dispersion and polarization-maintaining properties of a tellurite all-solid-state microstructured optical fiber with a flat core.

2022
Supercontinuum (SC) generation in optical fibers has been a topic of great interest because it can provide multiwavelength optical sources with high coherence and brightness which are useful for many potential applications such as wavelength division multiplexing transmission, optical frequency combs, spectroscopy and optical coherence tomography. However, SC spectra can also suffer from significant fluctuations in amplitude and it is important that the SC source is generated with low noise and with high spectral flatness. Recently, tellurite glasses have been employed for MOFs instead of silica glasses due to their high nonlinearity, wide transmission in the mid-IR region, low attenuation and high thermal stability. Several efforts have been devoted to obtain tellurite MOFs with flattened dispersion profiles because they can enhance the nonlinear spectral broadening and the spectral flatness of SC generation. But, they require very complex fiber structures which are difficult to be fabricated.
In order to control chromatic dispersion profile of tellurite fibers in higher extent but simplify their fiber structure, our group proposed a tellurite hybrid microstructured optical fiber (HMOF). The fiber was successfully fabricated and its chromatic dispersion was tailored to be near-zero and flattened with three zero-dispersion wavelengths at 1270, 1973 and 3627 nm.
Suppressing chromatic dispersion fluctuation for broadband optical parametric gain in highly nonlinear tellurite microstructured optical fibers

大石　泰丈, 鈴木　健伸

2018

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In this work, we study the suppression of chromatic dispersion fluctuation and the performance of FOPA in a tellurite hybrid microstructured optical fiber (HMOF) with buffer layer by taking into account the variation in the core diameter and fiber transverse geometry.

Outcome：

2022
Fiber-based optical parametric amplification (FOPA) is one of typical applications of four-wave-mixing (FWM) in highly nonlinear optical fibers which can transfer energy from one or two strong pump fields to a weak signal field and generate a new idler field. Since FOPA can provide broad gain bandwidths and high signal gain in many spectral bands where other types of optical amplifier cannot reach, it has been exploited for various applications such as signal amplification, wavelength conversion, phase-conjugation, slow and fast lights, optical signal processing and biomedical applications. However, high efficiency of FOPA performance is not easy to be obtained. It requires suitable pump sources, optical fibers with high nonlinearity and appropriate designs of chromatic dispersion which can satisfy the phase-matching condition. One of important technical issues for FOPA performance is that phase-matching condition for FWM in optical fibers is very sensitive to the fluctuation of chromatic dispersion which is caused by the fiber transverse geometry variation. A new fiber structure has been reported to suppress the chromatic dispersion fluctuation for silica fiber on the supposition that only the core diameter varies along the fiber length.
It was shown that tellurite HMOF with buffer layer is more advantageous to suppress the chromatic dispersion fluctuation and to improve the FOPA signal gain and bandwidth than conventional tellurite HMOF without buffer layer. By optimizing the diameters and refractive indices of the core and buffer layer so as to effectively suppress the chromatic dispersion fluctuation, HMOF with buffer layer can be a promising medium to overcome the influence of fiber transverse geometry variation on the performance of FOPA.
Study on dynamic bandgap control in an all solid tellurite photonic bandgap fiber

鈴木　健伸, 大石　泰丈

2018 - 2022

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　本研究では，全固体PBGFの伝搬特性を光によって動的に制御することで，一本のファイバに対して複数の伝搬特性を持たせ，光波制御応用の可能性を広げることを目的としている．

Outcome：

2022
　単一のコア，クラッド構造から成る従来型光ファイバは，光通信の伝送媒体，ファイバレーザ，光増幅器として幅広い分野で利用されている．一方，フォトニックバンドギャップファイバ(PBGF)は従来の全反射による光導波ではなく，フォトニックバンドギャップによる光導波を行うため，従来型光ファイバにはない様々な特性を持ち，センサや光波制御などに応用されている．特に全固体PBGFは希土類添加ファイバレーザの自然放出光制御，バンドパスフィルター，分散補償ファイバなど多くの応用の可能性があり，盛んに研究が行われている．動的特性制御の手法として，光カー効果による屈折率変化を利用し，非線形屈折率の高いテルライトガラスやカルコゲナイドガラスからなるファイバに関して，動的特性制御の実現可能性に対する検証を行った．コアの伝搬光とは別に，制御光を高屈折率ロッドに入射すると，1kW以上で伝搬波長域のシフトが顕著になることを初めて明らかにした．
Wavelength conversion performance in a tellurite step-index optical fiber

大石　泰丈, 鈴木　健伸

2018 - 2022

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Here, a tellurite step-index fiber with large core is fabricated to keep the zero-dispersion wavelength (ZDW) of the fundamental mode close to that of the material dispersion which is located in the near-infrared region.

Outcome：

2022
Four-wave mixing (FWM) in optical fibers is promising for wavelength conversion in optical networks due to its ultrafast response and high bit rate transmission. To further improve the performance of FWM-based wavelength conversion such as its bandwidth and conversion efficiency, the low nonlinearity of silica fibers should be improved by using novel highly nonlinear soft-glass fibers such as lead-silicate, bismuth-oxide, tellurite and chalcogenide fibers. By using a femtosecond pulsed laser pumped in the vicinity of the ZDW, it is expected to broaden and extend the bandwidth of the FWM-based wavelength conversion towards the near-infrared window for potential applications. When the pump wavelength was tuned from 1647 to 1795 nm, the signal was tuned from 1550 to 1434 nm, and the idler was generated from 1757 to 2400 nm. A 17.5 dB maximum signal gain at 1550 nm and +1.1 dB idler conversion efficiency at 1757 nm were obtained. When the pump wavelength was 1795 nm, the signal and generated idler wavelengths were 1434 and 2400 nm, respectively. To the best of our knowledge, this is the first time to demonstrate a FWM-based wavelength conversion performance whose wavelength spacing is ~966 nm (from 1434 to 2400 nm) in a tellurite step index optical fiber as short as 1 m.
Experimental investigation of multiple Raman peak properties in a hundred-meter tellurite fiber

鈴木　健伸, 大石　泰丈

2018 - 2022

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Multiple Raman peak properties in a 130 m tellurite fiber is investigated using different pump sources.

Outcome：

2022
When a nanosecond laser operated at ～1545 nm was used as the pump source, second-order Raman shift with multiple Raman peaks was observed. Especially for the first-order Raman shift, six obvious Raman peaks were obtained. To the best of our knowledge, this was the first demonstration of multiple Raman peaks in tellurite fibers. When a picosecond laser operated at ～1064 nm was used as the pump source, second-order Raman shift with only dual Raman peaks was observed, which can be applied to tunable lasers and amplifiers. Furthermore, the influence of fiber length on the evolution of Raman shift was investigated using a 2.5 m tellurite fiber. The reduction in fiber length led to a lower Raman gain, which induced only dual Raman peaks in each order Raman shift.

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Papers

Near-infrared optical image transport through an all-solid tellurite optical glass rod with transversely-disordered refractive index profile Reviewed

Tong Hoang Tuan, Shunei Kuroyanagi, Kenshiro Nagasaka, Takenobu Suzuki, Yasutake Ohishi

Optics Express 26 ( 13 ) 16054 - 16062 2018.6 （ ISSN:1094-4087 eISSN:1094-4087 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：OSA - The Optical Society

For the first time, an all-solid tellurite optical glass rod with a transversely disordered refractive index profile was fabricated successfully as a medium to study the transverse localization of light and near-infrared (NIR) optical image transport. Two tellurite glass compositions of 70TeO2-8Li2O-17WO3-3MoO3-2Nb2O5 (TLWMN) and 75TeO2-15ZnO-5Na2O-5La2O3 (TZNL) which have a small difference in softening temperature (about 0.5 °C), compatible thermal expansions from room to 400 °C and broad transmission range from about 0.4 up to 6.0 µm were developed for a successful fabrication process. The tellurite transversely disordered optical rod (TDOR) consists of high and low-index units (TLWMN and TZNL, respectively). The diameter of each unit is 1.0 μm and their refractive index difference was about 0.095 at 1.55 µm. Experimental results showed that after a CW probe beam at 1.55 μm propagated in a 10-cm-long tellurite TDOR, the beam became localized. In addition, NIR optical images at 1.55 μm of numbers on a test target were transported. The captured images at the output facet of the tellurite TDOR are visually clear with high contrast and high brightness. The quality of our transported optical images can be comparable or higher than the results which were obtained by a polymer Anderson localized fiber and by a commercially available multicore imaging optical fiber.

DOI： 10.1364/OE.26.016054
Localization of light and transport of infrared optical image in a tellurite optical fiber with transversely-disordered refractive index profile Reviewed

Tong Hoang Tuan, Shunei Kuroyanagi, Kenshiro Nagasaka, Takenobu Suzuki, Yasutake Ohishi

Optics InfoBase Conference Papers 2018 2018 （ ISBN:9781557528209 ）

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Language：English Publishing type：Research paper (international conference proceedings) Publisher：OSA - The Optical Society

By numerical calculations and experiments, we demonstrate that tellurite optical fibers with transverse-disordered refractive index profile can be used to obtain the localization of light and to transport infrared optical images at 1.55 μm.

DOI： 10.1364/CLEO_AT.2018.JTh2A.131
Quantum efficiency of Nd3+-doped phosphate glass under simulated sunlight Reviewed

Kohei Nogata, Takenobu Suzuki, Yasutake Ohishi

Optical Materials 35 ( 11 ) 1918 - 1921 2013.9 （ ISSN:0925-3467 ）

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Nd3+-doped P2O5-Al2O 3-K2O-BaO (LHG-8) glasses were prepared and the internal quantum efficiency (QE) of near-infrared emission of the glasses were directly measured with a simulated sunlight source and an 800 nm laser. The stimulated emission cross section (σ) and the radiative emission lifetime (τr) were also obtained by Judd-Ofelt analysis. The QE of Nd 3+:LHG-8 under the simulated sunlight was as high as 60% at the Nd2O3 concentration of 0.05 mol%, and this value was higher than those of Nd3+-doped oxide glasses, such as borosilicate, silicate, and tellurite glasses. The στr of LHG-8 was also higher than those of the other Nd3+-doped oxide glasses. © 2012 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.optmat.2012.12.021
Quantum efficiency of Nd3+-doped glasses under sunlight excitation Reviewed

Takenobu Suzuki, Hiroyuki Kawai, Hiroyuki Nasu, Mark Hughes, Yasutake Ohishi, Shintaro Mizuno, Hiroshi Ito, Kazuo Hasegawa

OPTICAL MATERIALS 33 ( 12 ) 1952 - 1957 2011.10 （ ISSN:0925-3467 eISSN:1873-1252 ）

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The internal quantum efficiencies under sunlight and laser excitation were measured directly by an integrating sphere method for tellurite, borosilicate and fluoride glasses. The radiative quantum efficiency was also obtained by Judd-Ofelt analysis. The radiative quantum efficiency was almost 100% for tellurite and fluoride glasses and 50% for borosilicate glasses. The quantum efficiency under laser excitation was 86%, 34% and 88% for tellurite, borosilicate and fluoride glasses at a low Nd3+ content and decreased by concentration quenching. The quantum efficiency under sunlight excitation was up to 33%, 21% and 70% for tellurite, borosilicate and fluoride glasses. Nd3+-doped fluoride glass is a promising candidate for solar pumped laser applications since it has the high quantum efficiency under sunlight excitation. (C) 2011 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.optmat.2011.03.045
Spectroscopic properties of Nd, Er codoped glasses for solar pumped fiber lasers Reviewed

Shintaro Mizuno, Hiroshi Ito, Kazuo Hasegawa, Hiroyuki Kawai, Hiroyuki Nasu, Mark A. Hughes, Takenobu Suzuki, Yasutake Ohishi

OPTICAL COMPONENTS AND MATERIALS VIII 7934 2011 （ ISSN:0277-786X eISSN:1996-756X ）

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Language：English Publishing type：Research paper (international conference proceedings) Publisher：SPIE-INT SOC OPTICAL ENGINEERING

The absorption and fluorescence characteristics of Er doped and Nd, Er codoped fluoride glasses were investigated under illumination of the simulated sunlight, laser or a monochromatic light filtered from a Xe lamp. Er was used as a sensitizing agent enhancing the energy conversion and the emission efficiency of Nd ions in fluoride glass intended for the sunlight excitation. Er doped fluoride glasses showed four emission peaks under simulated sunlight illumination at the wavelengths of 550, 848, 980, and 1530 nm attributed to the electronic transitions of Er3+ ions. The quantum efficiency of the emission from all of the bands had a peak at x = 0.5 mol. % Er and with the maximum of 73 %. The intensity of each emission band showed different ratios for various ErF3 contents. It is expected that concentration quenching of S-4(3/2) state is easy to occur with high concentration of ErF3 compared to the other states. The energy transfer from Er to Nd was studied using a monochromatic light illumination which is absorbed by Er3+ ions only. Strong contribution of Er absorption to the 1.05 mu m emission of Nd, Er co-doped fluoride glass was observed. Er was confirmed as a suitable sensitizer for the enhanced energy conversion and emission efficiency of Nd ions in ZBLAN glasses which are proposed for highly efficient solar pumped fiber lasers.

DOI： 10.1117/12.874616
Optical properties of Ni-doped MgGa2O4 single crystals grown by floating zone method

Takenobu Suzuki, Mark Hughes, Yasutake Ohishi

JOURNAL OF LUMINESCENCE 130 ( 1 ) 121 - 126 2010.1 （ ISSN:0022-2313 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

The single crystal growth conditions and spectroscopic characterization of Ni-doped MgGa2O4 with inverse-spinel structure crystal family are described. Single crystals of this material have been grown by floating zone method. Ni-doped MgGa2O4 single crystals have broadband fluorescence in the 1100-1600 nm wavelength range, 1.6 ms room temperature lifetime, 56% quantum efficiency and 1.05 x 10(-21) cm(2) stimulated emission cross section at the emission peak. This new material is very promising for tunable laser applications covering the important optical communication and eye safe wavelength region. (C) 2009 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.jlumin.2009.07.029
High quantum efficiency of Nd3+ -doped tellurite glass under sun excitation Reviewed

Hiroyuki Nasu, Hiroyuki Kawai, Mark A. Hughes, Takenobu Suzuki, Yasutake Ohishi, Shintaro Mizuno, Hiroshi Ito, Kazuo Hasegawa, Koji Shikano

2010 15TH OPTOELECTRONICS AND COMMUNICATIONS CONFERENCE (OECC) 624 - + 2010

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Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEICE-INST ELECTRONICS INFORMATION & COMMUNICATION ENGINEERS

The quantum efficiency of Nd3+-doped tellurite glass which is made from high-purity TeO2 under sunlight excitation was measured as more than 55%, which is high enough for solar pumped laser.
High quantum efficiency of Nd(3+)-doped ZBLAN glass under sunlight excitation Reviewed

Takenobu Suzuki, Hiroyuki Kawai, Hiroyuki Nasu, Mark Hughes, Yasutake Ohishi

2010 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) AND QUANTUM ELECTRONICS AND LASER SCIENCE CONFERENCE (QELS) 2010

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Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

The quantum efficiency of Nd(3+)-doped ZBLAN glass under sunlight excitation was measured as more than 70%, which would be due to the low loss in the VIS-UV region and phonon energy of the glass. (C) 2009 Optical Society of America
Synthesis and Luminescent Properties of Transparent Oxyfluoride Glass-Ceramics Containing Er3+:YLiF4 Nanocrystals Reviewed

Takenobu Suzuki, Shin-ichiro Masaki, Kento Mizuno, Yasutake Ohishi

APPLIED PHYSICS EXPRESS 3 ( 7 ) 0726010 2010 （ ISSN:1882-0778 ）

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Authorship：Lead author Language：English Publishing type：Research paper (scientific journal) Publisher：JAPAN SOC APPLIED PHYSICS

Transparent glass-ceramics containing YLiF4 nano-crystals were synthesized by controlled heat treatment of LiF-YF3-Al2O3-SiO2 glass. The crystallite size, estimated to be about 8 nm, was much less than the wavelength of visible light. From the fluorescent properties of the Er3+-doped precursor glass and the glass-ceramic, it was confirmed that Er3+ could be incorporated into YLiF4 nano-crystallites in the glass-ceramic. This transparent glass-ceramic containing YLiF4 nano-crystals is promising as a gain medium for rare earth-doped fiber lasers and amplifiers. (C) 2010 The Japan Society of Applied Physics

DOI： 10.1143/APEX.3.072601
Quantum efficiencies of near-infrared emission from Ni2+-doped glass-ceramics

Takenobu Suzuki, Yusuke Arai, Yasutake Ohishi

JOURNAL OF LUMINESCENCE 128 ( 4 ) 603 - 609 2008.4 （ ISSN:0022-2313 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

A systematic method to evaluate potentials of Ni2+-doped transparent glass-ceramics as a new broadband optical gain media is presented. At first, near-infrared emission of various ceramics were investigated to explore the suitable crystalline phase to be grown in the glass-ceramics. The quantum efficiency of Ni2+ near-infrared emission estimated by the Struck-Fonger analysis was higher than 95% for spinel-type structure gallate crystals MgGa2O4 and LiGa5O8 at room temperature. Transparent glass-ceramics containing Ni2+ : LiGa5O8 could be prepared and the quantum efficiency for the glass-ceramics was measured to be about 10%. This value shows a potential of Ni-doped transparent glass-ceramics as a broadband gain media. (c) 2007 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.jlumin.2007.10.010
Floating zone growth of Ni-doped MgGa(2)O(4) single crystal for near-infrared tunable laser Reviewed

Takenobu Suzuki, Yusuke Arai, Yasutake Ohishi

PHOTONIC FIBER AND CRYSTAL DEVICES: ADVANCES IN MATERIALS AND INNOVATIONS IN DEVICE APPLICATIONS II 7056 2008 （ ISSN:0277-786X ）

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Language：English Publishing type：Research paper (international conference proceedings) Publisher：SPIE-INT SOC OPTICAL ENGINEERING

Crystal growth and spectroscopic characterization of Ni-doped MgGa(2)O(4) belonging to inverse-spinel structure crystal family are described. Single crystals of this material were grown by floating zone method for the first time. Oxygen gas flow was essential to minimize evaporation of Ga(2)O(3) during the floating zone crystal growth process. Bubble and inclusion-free crystals were obtained for the growth rate less than 5 mm/hour. Ni:MgGa(2)O(4) single crystal was characterized by broadband fluorescence in 1100-1600 nm wavelength range and 1.6 msec room-temperature lifetime. It could be attributed to the transition of (3)T(2)((3)F)->(3)A((2)F) transition of the octahedrally coordinated Ni(2+). The internal quantum efficiency of the near-infrared fluorescence was about 82 % for 1 mol% Ni-doped MgGa(2)O(4) single crystal at room temperature. The new material is to be very promising for tunable laser applications covering the important optical communication, eye safe, 1100-1600 nm wavelength.

DOI： 10.1117/12.794141
Crystallization processes of Li2O–Ga2O3–SiO2–NiO system glasses Reviewed

Takenobu Suzuki, Yusuke Arai, Yasutake Ohishi

Journal of Non-Crystalline Solids 353 ( 1 ) 36 - 43 2007.1 （ ISSN:0022-3093 ）

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Authorship：Lead author,　Corresponding author Publishing type：Research paper (scientific journal) Publisher：Elsevier BV

DOI： 10.1016/j.jnoncrysol.2006.09.032
Ultrabroadband near-infrared emission from Bi-doped Li2O-Al2O3-SiO2 glass Reviewed

T Suzuki, Y Ohishi

APPLIED PHYSICS LETTERS 88 ( 19 ) 2006.5 （ ISSN:0003-6951 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：AMER INST PHYSICS

A broad near-infrared emission of Bi-doped lithium alumino silicate glasses has been investigated. It was found that the peak wavelength and width of the emission from the glasses could be controlled drastically by the excitation wavelength. The emission spectrum had the broadest bandwidth of more than 500 nm under 900 nm excitation. The emission consisted of two Gaussian peaks and the stimulated emission cross sections at the peaks were calculated as 7.3x10(-21) and 2.3x10(-20) cm(2). The lifetime was almost independent of temperature up to 350 K, indicating that the emission from the Bi-doped lithium alumino silicate glass has strong resistance to the thermal quenching. (c) 2006 American Institute of Physics.

DOI： 10.1063/1.2203214
Structural and spectroscopic properties of Li<inf>2</inf>O-Ga <inf>2</inf>O<inf>3</inf>-SiO<inf>2</inf>-NiO system transparent glass-ceramics Reviewed

Takenobu Suzuki, Yoshihide Nakatsubata, Ganapathy Senthil Murugan, Yasutake Ohishi

Ceramic Transactions 197 13 - 20 2006 （ ISBN:0470083433 ISSN:1042-1122 ）

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Publishing type：Research paper (international conference proceedings)

Glass-ceramics were obtained from Li2O-Ga2O 3-SiO2-NiO system glass. Opaque glass-ceramics were obtained by heat treatment of the temperatures above 973 K. Crystalline phases in the opaque glass-ceramics were identified as LiGaSi2O6 and LiGa5O8. Transparent glass-ceramics were obtained by heat treatment of the temperature range from 923 K to 953 K. The transparent glass-ceramics included a spinel type LiGa5O8 nanocrystals. The average diameter was about 5 nm. Suppression of generation of LiGaSi2O6 phase is a key point of heat treatment condition to obtain transparent glass-ceramics. Crystal field analyses of absorption spectra of Ni2+ ions revealed that Ni2+ ions in the glass-ceramics occupy octahedral sites and the crystal field parameters of Ni2+ in the glass-ceramics agreed well with that in LiGa 5O8. This fact suggests that the most of Ni2+ ions in the transparent glass-ceramics were included in LiGa5O 8 nanocrystals. The transparent glass-ceramics exhibited broadband near-infrared emission covering the wavelength region from 1100 nm to 1600 nm, which has never been observed in as-quenched glasses. The emission could be attributed to the transition from 3T2g to 3A2g state of octahedral Ni2+. The emission lifetime was more than 900 μsec at 5 K and 500 μsec even at 300 K. The emission quantum efficiency was measured by using an integration sphere. It was about 9.1 %, which is enough high as a practical gain medium.
Structural and optical properties of ZnO-Al2O3-SiO2 system glass-ceramics containing Ni2+-doped nanocrystals Reviewed

T Suzuki, K Horibuchi, Y Ohishi

JOURNAL OF NON-CRYSTALLINE SOLIDS 351 ( 27-29 ) 2304 - 2309 2005.8 （ ISSN:0022-3093 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

Transparent glass-ceramics were prepared from Ni2+-doped ZnO Al2O3-SiO2 (ZAS) system glasses by annealing. The color of the glasses drastically changed from brownish yellow to green by annealing. The crystalline phase being precipitated by annealing was identified as solid solutions of spinel compounds. The crystalline sizes estimated by transmission electron microscope observation in Ni2+-doped post-annealed glasses were about 10-15 nm in diameter, while that in non-doped post-annealed glasses were 510 nm. This suggests that Ni2+ ions in ZAS glass were incorporated into the crystalline phases as nucleation agents of crystallization. It was confirmed from optical absorption measurements that Ni2+ ions occupied fivefold sites in the as-cast glass, while Ni2+ ions occupied octahedral sites in the post-annealed glass. The Ni2+-doped post-annealed glasses exhibited near-infrared emission. It is thought that the crystals containing Ni2+ ions act as emission centers. (c) 2005 Elsevier B.V. Ail rights reserved.

DOI： 10.1016/j.jnoncrysol.2005.06.015
Broadband 1400 nm emission from Ni2+ in zinc-alumino-silicate glass Reviewed

T Suzuki, Y Ohishi

APPLIED PHYSICS LETTERS 84 ( 19 ) 3804 - 3806 2004.5 （ ISSN:0003-6951 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：AMER INST PHYSICS

Broadband near-infrared emission from Ni2+ in zinc-alumino-silicate glass was observed at room temperature. The emission band had a peak at similar to1400 nm with a bandwidth more than 300 nm, and covered the O, E, S, C, and L bands (1260-1625 nm). The emission lifetime was more than 200 mus even at room temperature. The observed near-infrared emission could be attributed to the (3)A(2g)(F-3)-->T-3(1g)(F-3) transition of Ni2+ in octahedral sites. This nickel-doped glass can be expected as an amplification medium for tunable lasers and broadband optical amplifiers for the wavelength division multiplexing transmission system applications. (C) 2004 American Institute of Physics.

DOI： 10.1063/1.1741027
Electronic Structure of Oxygen Dangling Bond in Glassy SiO2: The Role of Hyperconjugation Reviewed

Takenobu Suzuki, Linards Skuja, Koichi Kajihara, Masahiro Hirano, Toshio Kamiya, Hideo Hosono

Physical Review Letters 90 ( 18 ) 2003.5 （ ISSN:0031-9007 eISSN:1079-7114 ）

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Authorship：Lead author Publishing type：Research paper (scientific journal) Publisher：American Physical Society (APS)

DOI： 10.1103/physrevlett.90.186404

Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.90.186404/fulltext
Ion-beam doping of silver in amorphous As2S3 thin films Reviewed

Takenobu Suzuki, Hideo Hosono

Journal of Applied Physics 92 ( 4 ) 1821 - 1824 2002.8 （ ISSN:0021-8979 eISSN:1089-7550 ）

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Authorship：Lead author,　Corresponding author Publishing type：Research paper (scientific journal) Publisher：AIP Publishing

DOI： 10.1063/1.1492862
Optical gaps of alkali borate and alkali fluoroborate glasses Reviewed

Takenobu Suzuki, Masahiro Hirano, Hideo Hosono

Journal of Applied Physics 91 ( 7 ) 4149 - 4153 2002.4 （ ISSN:0021-8979 eISSN:1089-7550 ）

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Authorship：Lead author,　Corresponding author Publishing type：Research paper (scientific journal) Publisher：AIP Publishing

DOI： 10.1063/1.1456946
From 393 to 1167 nm Tunable Third-Harmonic Generation in a Mid-Infrared Tellurite Optical Fiber Reviewed

Tonglei Cheng, Meiting Pan, Xiaoyu Chen, Qi Wang, Yuanhongliu Gao, Xin Yan, Xuenan Zhang, Takenobu Suzuki, Yasutake Ohishi, Xue Zhou

IEEE Photonics Technology Letters 36 ( 10 ) 677 - 680 2024.5 （ ISSN:1041-1135 eISSN:1941-0174 ）

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Publishing type：Research paper (scientific journal) Publisher：Institute of Electrical and Electronics Engineers (IEEE)

DOI： 10.1109/lpt.2024.3381374
A Reliable Fiber-Optic Temperature Sensor Based on Fluorescence Intensity Ratio Technique for Real-Time Human Thermal Detection Reviewed

Wei Liu, Xin Tong, Zhiyuan Yin, Xuenan Zhang, Xin Yan, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng

Journal of Lightwave Technology 42 ( 8 ) 3045 - 3051 2024.4 （ ISSN:0733-8724 eISSN:1558-2213 ）

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Publishing type：Research paper (scientific journal) Publisher：Institute of Electrical and Electronics Engineers (IEEE)

DOI： 10.1109/jlt.2023.3347647
Synthesis and characterization of tellurite-air glass transversely disordered optical fiber Reviewed

Jonathan de Clermont-Gallerande, Antoine Legendre, Lucille Ascenci, Asuka Nakatani, Takenobu Suzuki, Yasutake Ohishi

Optical Components and Materials XXI 2024.3

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Publishing type：Research paper (international conference proceedings) Publisher：SPIE

DOI： 10.1117/12.3004121
Zero stress-optic TeO2-Li2O-ZnO-Bi2O3 glass fiber Reviewed

Jonathan de Clermont-Gallerande, Shunsuke Tatsumi, Asuka Nakatani, Takenobu Suzuki, Yasutake Ohishi, Katsuki Hayashi, Akira Saitoh

Journal of Non-Crystalline Solids 625 122760 - 122760 2024.2 （ ISSN:0022-3093 ）

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Publishing type：Research paper (scientific journal) Publisher：Elsevier BV

DOI： 10.1016/j.jnoncrysol.2023.122760
Soft glass based specialty optical fibers and their applications - INVITED Reviewed

Yasutake Ohishi, Takenobu Suzuki

EPJ Web of Conferences 287 10001 - 10001 2023.10 （ eISSN:2100-014X ）

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Publishing type：Research paper (scientific journal) Publisher：EDP Sciences

This paper describes a prospect for broadband mid-infrared (mid-IR) highly coherent supercontinuum generation. Tellurite and chalcogenide glass with high transparency up to the mid-IR range are used as fiber materials. We successfully develop all-solid hybrid microstructured optical fibers made of tellurite and chalcogenide glass to control chromatic dispersion and demonstrate that highly nonlinear soft glass microstructured optical fibers are promising media for broadband mid-IR highly coherent supercontinuum generation.

DOI： 10.1051/epjconf/202328710001
A Mach–Zehnder Interferometric Sensor for Contact Temperature Measurement of High Refractive Index Organics Based on a Double-Cladding Tellurite Optical Fiber Reviewed

Tonglei Cheng, Dianchang Song, Wei Liu, Zhiyuan Yin, Xin Yan, Xuenan Zhang, Fang Wang, Takenobu Suzuki, Yasutake Ohishi, Xue Zhou

IEEE Sensors Journal 23 ( 20 ) 24473 - 24480 2023.10 （ ISSN:1530-437X eISSN:1558-1748 ）

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Publishing type：Research paper (scientific journal) Publisher：Institute of Electrical and Electronics Engineers (IEEE)

DOI： 10.1109/jsen.2023.3305123
An Ultrafine No-Core Fiber-Based Sensor for Simultaneous Liquid Level and Temperature Measurement Reviewed

Dianchang Song, Wei Liu, Zhiyuan Yin, Qi Wang, Xin Yan, Xuenan Zhang, Fang Wang, Takenobu Suzuki, Yasutake Ohishi, Yu Qin, Yichun Shen, Zelin Zhang, Tonglei Cheng

IEEE Sensors Journal 23 ( 14 ) 15628 - 15636 2023.7 （ ISSN:1530-437X eISSN:1558-1748 ）

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Publishing type：Research paper (scientific journal) Publisher：Institute of Electrical and Electronics Engineers (IEEE)

DOI： 10.1109/jsen.2023.3282607
High sensitivity and stability probe-type refractive index sensor based on an optical fiber metasurface Reviewed

Xue Zhou, Yiming Wang, Yuanqi Sun, Fang Wang, Xin Yan, Xuenan Zhang, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng

Journal of the Optical Society of America B 40 ( 8 ) 1945 - 1945 2023.7 （ ISSN:0740-3224 eISSN:1520-8540 ）

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Publishing type：Research paper (scientific journal) Publisher：Optica Publishing Group

A specific probe-type sensor based on an optical fiber metasurface was proposed and simulated for refractive index (RI) sensing. In this work, a metasurface has been integrated with an optical fiber platform, which has huge potential applications in imaging, sensing, and communications. The designed RI sensor consists of stacking layers of Au and ZnO in a 2D structure deposited on the end face of commercial multimode optical fiber. The parameters and performance of the sensor structure are designed and simulated. The results show that the designed sensor structure can generate mode resonance and realize RI sensing. Numerical simulations reveal that when the pair of Au/ZnO layers is 4, the width of the nanopillars is 300 nm, the thickness of the Au layer is 45 nm, the thickness of ZnO layer is 40 nm, and the RI sensitivity of the designed sensor reaches 1415 nm/RIU. In addition, the high RI of Au/ZnO, along with its compatibility with the fiber core (SiO₂), makes it a perfect candidate to realize a multifunctional device. It also is a the biocompatible material that can be functionalized easily and used to realize biosensing.

DOI： 10.1364/josab.489845
Numerical analysis of optical confinement in silica and tellurite multicore fibers for near-infrared image transportation Reviewed

Takenobu Suzuki, Jonathan de Clermont-Gallerande, Asuka Nakatani, Yasutake Ohishi

Applied Optics 62 ( 17 ) 4423 - 4430 2023.6 （ ISSN:1559-128X eISSN:2155-3165 ）

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Authorship：Lead author,　Corresponding author Publishing type：Research paper (scientific journal) Publisher：Optica Publishing Group

DOI： 10.1364/ao.491443
An Antiinterference Temperature Sensor Based on Mach-Zehnder Interferometer Using Kagome Hollow-Core Photonic Crystal Fiber Reviewed

Qi Wang, Xiaoyu Chen, Xue Zhou, Wei Liu, Dianchang Song, Xin Yan, Xuenan Zhang, Fang Wang, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng

IEEE Sensors Journal 23 ( 8 ) 8426 - 8434 2023.4 （ ISSN:1530-437X eISSN:1558-1748 ）

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An antiinterference temperature sensor based on the Mach-Zehnder interferometer (MZI) is proposed, which is formed by successively fusing a homemade Kagome hollow-core photonic crystal fiber (HC-PCF) with two no-core fibers (NCFs) and two single-mode fibers (SMFs). Because of the antiresonant reflection optical waveguide properties, the interference between hollow-core mode and glass mode is achieved in Kagome HC-PCF, which significantly simplifies the overall sensing architecture and maintains better stability of the sensing signal. Using a Kagome HC-PCF length of $497 \mu \text{m}$ , the maximum temperature sensitivity of the proposed sensor is obtained as 38.39 pm/°C. Meanwhile, it exhibits a low sensitivity of 0.5041 pm/ $\mu \varepsilon $ to ambient stress variation, -0.28 nm/ $\text{m}^{-{1 } }$ to curvature change, and 9.35 nm/RIU to external refractive index (RI) change. This MZI temperature sensor has the advantages of compact structure, easy fabrication, low cost, small size, high sensitivity, and antiinterference capability, which can be expected to be applied to temperature sensing in complex environments.

DOI： 10.1109/JSEN.2023.3255859
Polarization-maintaining chalcogenide all-solid hybrid microstructured optical fibers and their mid-infrared supercontinuum generation Reviewed

Tong Hoang Tuan, Ayaka Koumura, Asuka Nakatani, Goichi Sakai, Morio Matsumoto, Takenobu Suzuki, Yasutake Ohishi

Optical Components and Materials XX 2023.3

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Publishing type：Research paper (international conference proceedings) Publisher：SPIE

DOI： 10.1117/12.2649780
Temperature sensing characteristics of two fundamental solitons in a glycerin-filled microstructured optical fiber Reviewed

Xiaoyu Chen **, Yuanhongliu Gao **, Qi Wang **, Fan Zhang **, Bin Li **, Xin Yan **, Xuenan Zhang,Fang Wang **, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng **

IEEE Transactions on Instrumentation and Measurement 72 1 - 8 2023.2

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A method of determining the refractive index of glasses in wide mid-infrared Reviewed

Asuka Nakatani, Morio Matsumoto, Goichi Sakai, Takenobu Suzuki, Yasutake Ohishi

Japanese Journal of Applied Physics 62 ( 1 ) 012005 - 1 2023.1 （ ISSN:0021-4922 eISSN:1347-4065 ）

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Publishing type：Research paper (scientific journal) Publisher：IOP Publishing

Abstract

We propose a method of merging the minimum deviation and the interferometric method to determine the refractive index dispersions of glasses in a wide range of the mid-infrared region with high accuracy. By the proposed method, the refractive index dispersions of telluride glasses, included in chalcogenide glasses, are successfully determined in the wavelength range from 3 to around 20 μm. The accuracy of the refractive index by the proposed method is no more than 1 × 10⁻³.

DOI： 10.35848/1347-4065/acabf2

Other Link： https://iopscience.iop.org/article/10.35848/1347-4065/acabf2/pdf
高非線形微細構造光ファイバによる広帯域中赤外コヒーレント光の発生 Reviewed

大石　泰丈, 鈴木　健伸

レーザー研究 51 ( 1 ) 27 - 31 2023.1

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A Fiber Temperature Sensor Based on Self-phase Modulation Effect in a Tapered Single-mode Optical Fiber Reviewed

Tonglei Cheng, Xiaoyu Chen, Takenobu Suzuki, Yasutake Ohishi

Frontiers in Optics + Laser Science 2023 (FiO, LS) 2023

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Publishing type：Research paper (international conference proceedings) Publisher：Optica Publishing Group

Drawing on the effect of self-phase modulation (SPM), a fiber-based temperature sensor is presented in this work by using a polydimethylsiloxane-coated single-mode fiber (SMF) with a tapered structure.

DOI： 10.1364/fio.2023.jtu4a.71
Luminescence enhanced temperature sensor based on the up-conversion emission in Er³⁺/Yb³⁺/Mo⁶⁺ tri-doped tellurite fiber Reviewed

Zhiyuan Yin, Wei Liu, Dianchang Song, Xiaoyu Chen, Qi Wang, Xue Zhou, Fang Wang, Xin Yan, Xuenan Zhang, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng

Ceramics International 2023 （ ISSN:0272-8842 ）

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In this study, the green up-conversion (UC) fluorescence emission in Er3+/Yb3+/Mo6+ tri-doped tellurite glasses (TeO2–ZnO–Li2CO3–Bi2O3, TZLB) was explored for temperature sensing. The doping of Mo6+ ions allowed enhanced luminescence at moderate power pumping, avoiding the introduction of undesired laser-induced thermal effects while improving the spectral signal-to-noise ratio. The luminescence characteristics were investigated in detail at different doping molar ratio of Mo6+ ions, and the strongest was observed at 8 mol%. Drawing on tri-doped TZLB glass with the strongest UC emission intensity, a tri-doped TZLB fiber was fabricated and coupled with two multimode fibers (MMFs) via Ultraviolet (UV) adhesive, forming the temperature sensor. The sensor was further encapsulated by a silica tube sealed with Ultraviolet adhesive, overcoming the poor mechanical property of tellurite fiber. The temperature information could be demodulated based on the fluorescence intensity ratio technique. The temperature sensing performance of the tri-doped TZLB sensor was investigated as temperature varied from 258 to 420 K and its repeatability was experimentally verified. The Er3+/Yb3+/Mo6+ tri-doped TZLB has an application prospect in the field of lighting, and the so-based temperature sensor is expected to be applied to thermal detection in the fields of medical diagnostics, environmental monitoring, and optical thermometers, etc.

DOI： 10.1016/j.ceramint.2023.03.014
A Reliable Anti-Interference Temperature Sensor Based on a Four-Hole Microstructure Optical Fiber Mach–Zehnder Interferometer Reviewed

Tonglei Cheng, Wei Liu, Dianchang Song, Bin Li, Zhiyuan Yin, Xinghui Li, Huifang Wang, Xin Yan, Xuenan Zhang, Takenobu Suzuki, Yasutake Ohishi, Fang Wang

IEEE Transactions on Instrumentation and Measurement 72 1 - 9 2023 （ ISSN:0018-9456 eISSN:1557-9662 ）

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Publishing type：Research paper (scientific journal) Publisher：Institute of Electrical and Electronics Engineers (IEEE)

DOI： 10.1109/tim.2023.3287257
Cross-talk analysis in chalcogenide triangular lattice fibers with three sublattices for high-resolution mid-infrared image transport Reviewed

Asuka Nakatani, Jonathan de Clermont-Gallerande, Takenobu Suzuki, Yasutake Ohishi

CLEO 2023 2023

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Publishing type：Research paper (international conference proceedings) Publisher：Optica Publishing Group

We propose triangular lattice fibers (TLFs) with three s ublattices made of chalcogenide glasses and reveal the core diameters and the core separation of the TLFs by numerical simulation of cross-talk for high-resolution mid-infrared image transport.

DOI： 10.1364/cleo_at.2023.jtu2a.103
Numerical Analysis of Crosstalk in Tellurite Multi-Core Fiber for Near-Infrared Image Transportation Reviewed

Takenobu Suzuki, Jonathan de Clermont-Gallerande, Asuka Nakatani, Yasutake Ohishi

CLEO 2023 2023

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Publishing type：Research paper (international conference proceedings) Publisher：Optica Publishing Group

Crosstalk in tellurite and silica multi-core fibers was calculated. The results showed that tellurite fibers can provide 1.83 times the resolution and 2.5 times the brightness compared to silica fibers in image transportation at 1.55 µm.

DOI： 10.1364/cleo_at.2023.jtu2a.10
Tellurite-Based Oxide Fiber Simulated Beam Pattern Evolution Using a Refractive Index Network with Controlled Randomness Reviewed

DE CLERMONT, Jonathan, Takenobu Suzuki, Asuka Nakatani*, Tong Hoang Tuan, Yasutake Ohishi

第83回応用物理学会秋季学術講演会講演予稿集 03 - 560 2022.12

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Experimental investigation of supercontinuum generation in a birefringence tellurite microstructured optical fiber Reviewed

Tonglei Cheng, Xiaoyu Chen, Qi Wang, Yuanhongliu Gao, Bin Li, Ning Yang, Xin Yan, Xuenan Zhang, Takenobu Suzuki, Yasutake Ohishi, Zheng Liu, Fang Wang

Applied Optics 61 ( 32 ) 9749 - 9754 2022.11 （ ISSN:1559-128X eISSN:2155-3165 ）

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Publishing type：Research paper (scientific journal) Publisher：Optica Publishing Group

A four-hole birefringence tellurite microstructured optical fiber (BTMOF) was designed and fabricated based on glass, and its core (slow and fast axes were) measured to be approximately 4.74 µm and 4.29 µm, respectively. The experimentally measured results demonstrated that the maximum supercontinuum (SC) spectra extended from to when the polarization state of the pump pulse was parallel to the fast axis at 1400 nm with an average power of 460 mW. We performed numerical simulations based on the nonlinear Schrödinger equation, which support the experimentally measured results. The SC generation in birefringent silica microstructured fiber with the same geometric parameters was simulated, and the results showed that the enhanced nonlinear refractive index of the BTMOF yielded a spectrum with a significantly larger bandwidth. Furthermore, the two polarization states along the fast axis and slow axis exhibit different dispersion characteristics, which provide a convenient way of tuning the properties of the generated SC. This work highlights BTMOF as a promising platform for the development of a SC light source, which can be widely used in food quality inspection, early cancer diagnostics, gas sensing, and high-spatial-resolution imaging.

DOI： 10.1364/ao.473596
A Reliable Anti-Interference Probe Based on Fluorescence Intensity Ratio Technique for Cryogenic Temperature Detection Reviewed

Wei Liu, Zhiyuan Yin, Dianchang Song, Fan Zhang, Bin Li, Fang Wang, Xuenan Zhang, Xin Yan, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng

Journal of Lightwave Technology 40 ( 21 ) 7219 - 7225 2022.11 （ ISSN:0733-8724 eISSN:1558-2213 ）

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Publishing type：Research paper (scientific journal) Publisher：Institute of Electrical and Electronics Engineers (IEEE)

DOI： 10.1109/jlt.2022.3200387
Plug-in tip sensor based on upconversion fluorescence in Er³+/Yb³⁺ co-doped tellurite glass for thermal monitoring of a miniature winding coil Reviewed

Wei Liu **, Dianchang Song **, Zhiyuan Yin **, Fan Zhang **, Bin Li **, Fang Wang **, Xuenan Zhang,Xin Yan **, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng **

Optics Letters 47 ( 20 ) 5297 - 5300 2022.10

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Plug-in tip sensor based on upconversion fluorescence in Er³⁺/Yb³⁺ co-doped tellurite glass for thermal monitoring of a miniature winding coil Reviewed

Wei Liu, Dianchang Song, Zhiyuan Yin, Fan Zhang, Bin Li, Fang Wang, Xuenan Zhang, Xin Yan, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng

Optics Letters 47 ( 20 ) 5297 - 5297 2022.10 （ ISSN:0146-9592 eISSN:1539-4794 ）

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Publishing type：Research paper (scientific journal) Publisher：Optica Publishing Group

We demonstrate a plug-in tip sensor with a maximum cross section diameter of only 1 mm for real-time thermal monitoring of a high-density miniature winding coil, which can meet the miniaturization development needs of electromagnetic actuators. Due to the high upconversion luminescence efficiency, tellurite glass with an optimized Er³⁺/Yb³⁺ doping ratio is adhered to the end face of silica fiber for a temperature-sensitive tip. Temperature information is demodulated using the fluorescence intensity ratio technique, yielding a nonlinear response with R² up to 0.9978. Within a wide temperature range of 253.55–442.45 K, the tip sensor exhibits good repeatability, excellent stability, high sensitivity of 52.7 × 10⁻⁴K⁻¹, small absolute error within ±1 K, and fast time response of 2.03 s. It has been successfully proven to be a miniaturized device with strong anti-interference ability for the health management of high-density winding coils.

DOI： 10.1364/ol.473041
Fabrication and supercontinuum generation in a chalcogenide all-solid hybrid microstructured optical fiber with polarization maintaining properties Reviewed

Tong Hoang Tuan, Ayaka Koumura*, Asuka Nakatani*, Hoa Phuoc Trung Nguyen*, Morio Matsumoto **, Goichi Sakai **, Takenobu Suzuki, Yasutake Ohishi

Proceedings of Frontiers in Optics ＋ Laser Science 2022 JW4A.10 2022.10

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A Self-Phase Modulation Effect Temperature Sensor Based on Tapered Single-Mode Optical Fiber Reviewed

Xiaoyu Chen **, Yuanhongliu Gao **, Qi Wang **, Bin Li **, Xin Yan **, Xuenan Zhang **, Fang Wang **, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng **

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 71 #7008308 2022.10

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A Compact Fluorescent Probe for Real-Time Thermal Monitoring of Chips Reviewed

Tonglei Cheng, Wei Liu, Dianchang Song, Zhiyuan Yin, Fan Zhang, Bin Li, Xuenan Zhang, Takenobu Suzuki, Yasutake Ohishi, Fang Wang

Journal of Lightwave Technology 40 ( 18 ) 6288 - 6295 2022.9 （ ISSN:0733-8724 eISSN:1558-2213 ）

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Publishing type：Research paper (scientific journal) Publisher：Institute of Electrical and Electronics Engineers (IEEE)

DOI： 10.1109/jlt.2022.3191995
A Sagnac Interferometer-based Twist Angle Sensor Drawing on an Eccentric Dual-core Fiber Reviewed

Tonglei Cheng *, Bin Li *, Fan Zhang *, Wei Liu *, Xiaoyu Chen *, Yuanhongliu Gao *, Xin Yan *, Xuenan Zhang,Fang Wang *, Takenobu Suzuki, Yasutake Ohishi

IEEE Transactions on Instrumentation and Measurement 71 7006108 2022.8

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Authorship：Corresponding author Publishing type：Research paper (scientific journal)
Fluorescent Optical Fiber Intensity Ratio Temperature Sensor Based on Polymer Matrix Using Down-Conversion from ZnS:Cu. Reviewed

Bin Li **, Fan Zhang **, Wei Liu **, Xiaoyu Chen **, Yuanhongliu Gao **, Qi Zhang **, Xin Yan,Frang Wang,Xuenan Zhang*, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng **

IEEE Transactions on Instrumentation and Measurement 71 2022.8

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Multimode interferometric sensor based on the no-core tellurite optical fiber for cryogenic temperature detection Reviewed

Wei Liu **, Dianchang Song*, Zhiyuan Yin **, Fan Zhang **, Bin Li **, Xuenan Zhang **, Fang Wang **, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng*

Optics Express 30 ( 15 ) 26238 - 26250 2022.7

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Chalcogenide all-solid hybrid microstructured optical fiber with polarization maintaining mid-infrared supercontinuum generation. Reviewed

Tong Hoang Tuan, Ayaka Koumura*, Asuka Nakatani*, Hoa Phuoc Trung Nguyen*, Morio Matsumoto **, Goichi Sakai **, Takenobu Suzuki, Yasutake Ohishi

Optics Express 30 ( 14 ) 25433 - 25449 2022.7

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Publishing type：Research paper (scientific journal)
Chalcogenide all-solid hybrid microstructured optical fiber with polarization maintaining properties and its mid-infrared supercontinuum generation Reviewed

Hoang Tuan Tong, Ayaka Koumura, Asuka Nakatani, Hoa Phuoc Trung Nguyen, Morio Matsumoto, Goichi Sakai, Takenobu Suzuki, Yasutake Ohishi

Optics Express 30 ( 14 ) 25433 - 25433 2022.7 （ eISSN:1094-4087 ）

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Publishing type：Research paper (scientific journal) Publisher：Optica Publishing Group

In this paper, we report a successful fabrication of a highly nonlinear chalcogenide all-solid hybrid microstructured optical fiber with polarization maintaining properties and a mid-infrared SC generation. Up to 4.5 × 10⁻⁴ at 10 µm of the fiber birefringence can be realized by employing a single As₂Se₃ core and two As₂S₅ rods horizontally aligned in the AsSe₂ cladding. The fiber possesses a near-zero and flattened all-normal chromatic dispersion profile over the wavelength range from 5 to 10 µm. The polarization maintaining properties of the fiber is experimentally confirmed and a broadband supercontinuum spectrum from 2 to 10 µm in the mid-infrared window was experimentally demonstrated.

DOI： 10.1364/oe.459745
A Sagnac Interferometer Ultraviolet Sensor Based on ZnO-Coated No-Core Fiber Reviewed

Tonglei Cheng, Fan Zhang, Bin Li, Wei Liu, Xiaoyu Chen, Yuanhongliu Gao, Xin Yan, Xuenan Zhang, Fang Wang, Takenobu Suzuki, Yasutake Ohishi

Journal of Lightwave Technology 40 ( 13 ) 4474 - 4480 2022.7 （ ISSN:0733-8724 eISSN:1558-2213 ）

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Publishing type：Research paper (scientific journal) Publisher：Institute of Electrical and Electronics Engineers (IEEE)

DOI： 10.1109/jlt.2022.3161675
Frequency conversions of nine peaks based on dispersive waves and solitons in a tellurite microstructured optical fiber Reviewed

Tonglei Cheng, Xiaoyu Chen, Qi Wang, Xin Yan, Xuenan Zhang, Takenobu Suzuki, Yasutake Ohishi, Fang Wang

Optics Letters 47 ( 13 ) 3215 - 3218 2022.7 （ ISSN:0146-9592 eISSN:1539-4794 ）

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Publishing type：Research paper (scientific journal) Publisher：Optica Publishing Group

DOI： 10.1364/ol.464239
A multimode interferometric sensor based on the no-core tellurite optical fiber for cryogenic temperature detection Reviewed

Wei Liu, Dianchang Song, Zhiyuan Yin, FAN ZHANG, Bin Li, Xuenan Zhang, FANG Wang, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng

Optics Express 30 ( 15 ) 26238 - 26238 2022.6 （ eISSN:1094-4087 ）

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Publishing type：Research paper (scientific journal) Publisher：Optica Publishing Group

In this paper, a no-core tellurite optical fiber (NCTOF)-based sensor was proposed for cryogenic temperature detection in refrigeration process. The ultraviolet adhesive (UVA) dual-curing method was operated to stablish a sandwich-like composite structure, in which a section of NCTOF was compactly sandwiched between two segments of silica fiber to form multimode interference. The temperature sensing characteristics in cryogenic range were experimentally investigated by monitoring the transmission spectral movement, where a high sensitivity of 105.6 pm/°C was achieved in the range of −20-0 °C and 51.6 pm/°C in the range of −20-25 °C. The excellent performance was consistent with the simulation analysis. The maximum repeatability standard deviation and stability wavelength error of the sensor are 0.9799 pm/°C and 0.1676 nm, respectively. To the best of our knowledge, this is the first report on using tellurite optical fibers for cryogenic temperature detection, and the UVA dual-curing method provides a reliable solution for the integration and practical application of tellurite optical fiber. The proposed sensor is simple in structure, easy in fabrication, low in cost and excellent in performance. It can be expected to be used in food refrigeration, air-conditioning engineering, medical and health, industrial production, etc.

DOI： 10.1364/oe.463059
Design of a temperature-control optical switch based on conjoined-tubular anti-resonance fiber with toluene core Reviewed

Qiming Wang, Bin Li, Xin Yan, Xuenan Zhang, Fang Wang, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng

Optics Communications 510 2022.5 （ ISSN:0030-4018 ）

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Publishing type：Research paper (scientific journal)

In this paper, a temperature-control optical switch is designed based on a conjoined-tubular anti-resonance optical fiber (CTF). The CTF adopts eight pairs of conjoined tubes and four vertical-layout holes were coated with Au to increase the fiber confinement loss (Loss). Toluene was used as transmission medium to injected into the CTF core. The proposed switch produces a Loss difference over 100 dB and ER more than 30 dB. Influence of switch material refractive index and structural parameters on optical switch performance was further discussed. The proposed optical fiber switch has the features of simple structure, small size, broad working wavebands and adjustable operation temperature, which promises broad application prospects in industry, chemistry, biology and other fields.

DOI： 10.1016/j.optcom.2021.127871
A Magnetic Field Sensor Based on Birefringence Effect in Asymmetric Four-hole Fiber Reviewed

Fan Zhang **, Bin Li **, Xiaoyu Chen **, Yuanhongliu Gao **, Xin Yan **, Xuenan Zhang **, Fang Wang **, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng **

Journal of lightwave technology 40 ( 8 ) 2594 - 2600 2022.4

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Publishing type：Research paper (scientific journal)
Suppressing fluctuation of chromatic dispersion and signal gain performances in a chalcogenide buffer step-index optical fiber Reviewed

Tong Hoang Tuan, Ayaka Koumura*, Asuka Nakatani*, Goichi Sakai **, Morio Matsumoto **, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE Optical Components and Materials XIX 11997 119970R - 1 2022.3

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Publishing type：Research paper (international conference proceedings)
High pressure photoluminescence of bismuth-doped yttria-alumina-silica glass Reviewed

Mark A. Hughes, Robert McMaster, John E. Proctor, Daniel W. Hewak, Takenobu Suzuki, Yasutake Ohishi

High Pressure Research 42 1 - 11 2022.2 （ ISSN:0895-7959 eISSN:1477-2299 ）

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Publishing type：Research paper (scientific journal) Publisher：Informa UK Limited

DOI： 10.1080/08957959.2022.2044031
Mid-Infrared Stimulated Raman Scattering and Four-Wave Mixing in a Tellurite Microstructured Optical Fiber Reviewed

T. Cheng **, X. Chen **, X. Yan **, X. Zhang **, F. Wang **, Takenobu Suzuki, Yasutake Ohishi

IEEE Photonics Technology Letters 34 ( 4 ) 239 - 242 2022.2

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Publishing type：Research paper (scientific journal)
Single-mode tellurite optical fiber for temperature measurement based on self-phase modulation effect Reviewed

T. Cheng **, X. Chen **, Y. Gao **, F. Zhang **, B. Li **, X. Yan **, X. Zhang **, F. Wang **, Takenobu Suzuki, Yasutake Ohishi

Optics Letters 47 ( 4 ) 874 - 877 2022.2

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Publishing type：Research paper (scientific journal)
A Surface Plasmon Resonance Optical Fiber Sensor for Simultaneous Measurement of Relative Humidity and Temperature Reviewed

Tonglei Cheng, Bin Li, Fan Zhang, Junxin Chen, Qi Zhang, Xin Yan, Xuenan Zhang, Takenobu Suzuki, Yasutake Ohishi, Fang Wang

IEEE Sensors Journal 22 ( 4 ) 3246 - 3253 2022.2 （ ISSN:1530-437X eISSN:1558-1748 ）

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Publishing type：Research paper (scientific journal) Publisher：Institute of Electrical and Electronics Engineers (IEEE)

DOI： 10.1109/jsen.2022.3141239
Mid-Infrared Stimulated Raman Scattering and Four-Wave Mixing in a Tellurite Microstructed Optical Fiber Reviewed

Tonglei Cheng, Xiaoyu Chen, Xin Yan, Xuenan Zhang, Fang Wang, Takenobu Suzuki, Yasutake Ohishi

IEEE Photonics Technology Letters 34 ( 4 ) 239 - 242 2022.2 （ ISSN:1041-1135 eISSN:1941-0174 ）

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Publishing type：Research paper (scientific journal) Publisher：Institute of Electrical and Electronics Engineers (IEEE)

DOI： 10.1109/lpt.2022.3147768
Transverse Anderson localization of mid-infrared light in a chalcogenide transversely disordered optical fiber Reviewed

Asuka Nakatani, Hoang Tuan Tong, Morio Matsumoto, Goichi Sakai, Takenobu Suzuki, Yasutake Ohishi

Optics Express 30 ( 4 ) 5159 - 5166 2022.2 （ eISSN:1094-4087 ）

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Publishing type：Research paper (scientific journal) Publisher：The Optical Society

DOI： 10.1364/oe.450864
Highly sensitive nonlinear temperature sensor based on soliton self-frequency shift technique in a microstructured optical fiber Reviewed

Xiaoyu Chen, Xin Yan, Xuenan Zhang, Fang Wang, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng

Sensors and Actuators A: Physical 334 2022.2 （ ISSN:0924-4247 ）

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Publishing type：Research paper (scientific journal)

A novel fiber-optic soliton self-frequency shift (SSFS) temperature sensor fabricated using an in-house-made microstructured optical fiber was proposed. Based on this sensor, SSFS-based sensing was systematically investigated with the variation of average pump power and pump wavelength. By detecting the central wavelength shift of the 3-dB bandwidth of the soliton with the change in temperature, the sensing performance of the proposed sensor was evaluated experimentally and theoretically, subject to the average pump power and pump wavelength. At the generation of the fundamental soliton, when the pump wavelength was fixed, the higher the average pump power, the higher the temperature sensitivity. When the average pump power was fixed, the longer the pump wavelength, the higher the temperature sensitivity. The maximum temperature sensitivity of the proposed sensor was 1.759 nm/℃ at an average pump power of 300 mW and pump wavelength of 1600 nm. This temperature sensor exhibited excellent properties, such as high sensitivity, a simple structure, an easy fabrication process, good mechanical strength, and low cost, rendering it highly applicable in fields such as food quality control, environmental monitoring, and biomedical testing.

DOI： 10.1016/j.sna.2021.113333
A Single-mode Tellurite Optical Fiber for Temperature Measurement Based on Self-phase Modulation Effect Reviewed

Tonglei Cheng, XIAOYU CHEN, Yuanhongliu Gao, FAN ZHANG, Bin Li, Xin Yan, Xuenan Zhang, Takenobu Suzuki, Yasutake Ohishi, FANG Wang

Optics Letters 2022.1 （ ISSN:0146-9592 eISSN:1539-4794 ）

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Publishing type：Research paper (scientific journal) Publisher：The Optical Society

DOI： 10.1364/ol.449945
Tungsten Carbide Nanoparticles as Saturable Absorber for Q-Switched Erbium-Doped Fiber Laser Reviewed

Dongfang Lan, Tonglei Cheng, Yuhan Qu, Xuenan Zhang, Xin Yan, Takenobu Suzuki, Yasutake Ohishi, Fang Wang

IEEE Photonics Technology Letters 34 ( 2 ) 113 - 116 2022.1 （ ISSN:1041-1135 eISSN:1941-0174 ）

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Publishing type：Research paper (scientific journal) Publisher：Institute of Electrical and Electronics Engineers (IEEE)

DOI： 10.1109/lpt.2022.3142143
高非線形光ファイバによる広帯域中赤外光の発生 Reviewed

大石　泰丈, 鈴木　健伸

レーザー学会学術講演会　第42回年次大会講演予稿集 F01 - 12a 2022.1

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Authorship：Last author Publishing type：Research paper (international conference proceedings)
Chromatic dispersion control in a Ge-Ga-Si-Te microstructured optical fiber Reviewed

Tong Hoang Tuan, Fumiya Sano, Asuka Nakatani, Morio Matsumoto, Goichi Sakai, Takenobu Suzuki, Yasutake Ohishi

2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings 2022 （ ISBN:9781957171050 ）

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Publishing type：Research paper (international conference proceedings)

Based on the thermal and optical properties of Ge15Ga5Si2.5Te77.5 glass, we demonstrate the chromatic dispersion control using a microstructured optical fiber with 6 air holes to shift the zero-dispersion wavelength to the near infrared regions.
Microstructured optical fiber filled with glycerin for temperature measurement based on dispersive wave and soliton Reviewed

Tonglei Cheng, Xiaoyu Chen, Xin Yan, Xuenan Zhang, Fang Wang, Takenobu Suzuki, Yasutake Ohishi

Optics Express 29 ( 26 ) 42355 - 42368 2021.12 （ eISSN:1094-4087 ）

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Publishing type：Research paper (scientific journal) Publisher：The Optical Society

DOI： 10.1364/oe.441576
Investigation of Fabry Perot Interferometer Temperature Sensor Based on Hollow Core Anti-Resonance Optical Fiber Reviewed

Qiming Wang, Bin Li, Rongxu Shen, Xin Yan, Xuenan Zhang, Fang Wang, Takenobu Suzuki, Yasutak Ohishi, Tonglei Cheng

IEEE Photonics Journal 13 ( 6 ) 6800308 - 1 2021.12 （ eISSN:1943-0655 ）

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Publishing type：Research paper (scientific journal) Publisher：Institute of Electrical and Electronics Engineers (IEEE)

DOI： 10.1109/jphot.2021.3123977
Numerical demonstration of mid-infrared temperature sensing by soliton self-frequency shift in a fluorotellurite microstructured fiber Reviewed

Tonglei Cheng, Yue Sun, Fan Zhang, Xin Yan, Xuenan Zhang, Fang Wang, Shuguang Li, Takenobu Suzuki, Yasutake Ohishi

Applied Physics B: Lasers and Optics 127 ( 12 ) 2021.12 （ ISSN:0946-2171 ）

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Publishing type：Research paper (scientific journal)

We theoretically proposed the concept of temperature sensing using the soliton self-frequency shift (SSFS) effect in a fluorotellurite microstructured fiber (FTMF) which had one ring of six alcohol-infiltrated air holes. The glass material for the fiber core was 70TeO2–20BaF2–10Y2O3 and the cladding AlF3–BaF2–CaF2–YF3–SrF2–MgF2–TeO2. Based on SSFS effect, temperature sensing in the mid-infrared (MIR) region was achieved by detecting the wavelength shift of solitons with the variation of temperature. Using a 2800 nm fiber laser with a pulse width of 131 fs as the pump light and a 0.5-m-long FTMF as the nonlinear media, the temperature sensing sensitivity could be as high as 2.09 nm/°C. To the best of our knowledge, this is the first study concerning temperature sensing in the MIR region by drawing on SSFS effect in a non-silica FTMF.

DOI： 10.1007/s00340-021-07695-6
Maintaining chromatic dispersion and signal gain performances in a chalcogenide buffer step-index optical fiber Reviewed

Hoang Tuan Tong, Ayaka Koumura, Asuka Nakatani, Takenobu Suzuki, Yasutake Ohishi

Optics Express 29 ( 23 ) 37877 - 37891 2021.11 （ eISSN:1094-4087 ）

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Publishing type：Research paper (scientific journal) Publisher：The Optical Society

DOI： 10.1364/oe.442334
Carboxymethyl Cellulose/Graphene Oxide Composite Film-Coated Humidity Sensor Based on Thin-Core Fiber Mach-Zehnder Interferometer Reviewed

Wei Liu, Fan Zhang, Xin Yan, Fang Wang, Xuenan Zhang, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng

IEEE Sensors Journal 21 ( 21 ) 23767 - 23775 2021.11 （ ISSN:1530-437X eISSN:1558-1748 ）

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Publishing type：Research paper (scientific journal) Publisher：Institute of Electrical and Electronics Engineers (IEEE)

DOI： 10.1109/jsen.2021.3115621
Temperature sensing in a Silica Microstructured Optical Fiber based on Soliton Self-frequency Shift. Reviewed

X. Chen **, Y. Sun **, Y. Gao **, X. Yan **, X. Zhang **, F. Wang **, Takenobu Suzuki, Yasutake Ohishi, T. Cheng **

IEEE Transactions on Instrumentation and Measurement 70 #9514409 2021.11

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Publishing type：Research paper (scientific journal)
Mid-infrared cascaded stimulated raman scattering and flat supercontinuum generation in an As-S optical fiber pump at 2μm. Reviewed

Fang Wang **, Xue Zhou **, Xuenan Zhang **, Xin Yan **, Shuguang Li **, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng **

Applied Optics 60 ( 22 ) 6351 - 6356 2021.8

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Mid-infrared cascaded stimulated Raman scattering and flat supercontinuum generation in an As-S optical fiber pump at 2 µm Reviewed

Fang Wang, Xue Zhou, Xuenan Zhang, Xin Yan, Shuguang Li, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng

Applied Optics 60 ( 22 ) 6351 - 6351 2021.8 （ ISSN:1559-128X eISSN:2155-3165 ）

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Publishing type：Research paper (scientific journal) Publisher：The Optical Society

DOI： 10.1364/ao.432394
An Ultra-High Sensitivity Optical Fiber Refractive Index Sensor Based on Plasmonic Mach-Zehnder Interferometer Reviewed

Xue Zhou, Xuegang Li, Xin Yan, Xuenan Zhang, Fang Wang, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng

IEEE Photonics Journal 13 ( 4 ) 4800207 - 1 2021.8 （ eISSN:1943-0655 ）

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Publishing type：Research paper (scientific journal) Publisher：Institute of Electrical and Electronics Engineers (IEEE)

DOI： 10.1109/jphot.2021.3106298
A Miniature Optical Fiber Fabry-Perot Interferometer Temperature Sensor Based on Tellurite Glass Reviewed

X. Zhou **, X. Li **, X. Yan **, X. Zhang **, F. Wang **, Takenobu Suzuki, Yasutake Ohishi, T. Cheng **

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 70 1 - 6 2021.7

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Microstructured optical fiber temperature sensor based on the self-phase modulation effect Reviewed

Xiaoyu Chen, Xin Yan, Xuenan Zhang, Fang Wang, Shuguang Li, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng

Optics Express 29 ( 10 ) 15653 - 15663 2021.5 （ eISSN:1094-4087 ）

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Publishing type：Research paper (scientific journal) Publisher：The Optical Society

DOI： 10.1364/oe.425863
Theoretical Investigation of mid-infrared temperature Sensing Based on Four-Wave Mixing in a CS₂-Filled GeAsSeTe Microstructured Optical Fiber Reviewed

Xiacyu Chen **, Xin Yan **, Xuenan Zhang **, Fang Wang **, Shuguang Li **, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng **

IEEE Sensors Journal 21 ( 9 ) 10711 - 10718 2021.5

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Theoretical Investigation of Mid-Infrared Temperature Sensing Based on Four-Wave Mixing in a CS2-Filled GeAsSeTe Microstructured Optical Fiber Reviewed

Xiaoyu Chen, Xin Yan, Xuenan Zhang, Fang Wang, Shuguang Li, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng

IEEE Sensors Journal 21 ( 9 ) 10711 - 10718 2021.5 （ ISSN:1530-437X eISSN:1558-1748 ）

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Publishing type：Research paper (scientific journal) Publisher：Institute of Electrical and Electronics Engineers (IEEE)

DOI： 10.1109/jsen.2021.3061654
Ultra-flattened and near-zero chromatic dispersion control by chalcogenide all-solid hybrid microstructured optical fibers Reviewed

Tong Hoang Tuan, Hoa Phuoc Trung Nguyen, Ayaka Koumura, Takenobu Suzuki, Yasutake Ohishi

2021 Conference on Lasers and Electro-Optics, CLEO 2021 - Proceedings JW1A.57 2021.5 （ ISBN:9781943580910 ）

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Publishing type：Research paper (international conference proceedings)

We demonstrate ultra-flattened (less than 1ps/km.nm) and near-zero chromatic dispersions profiles which can be tailored with high freedom by using our proposed chalcogenide all-solid hybrid microstructure optical fibers.
Numerical analysis of magnetic field measurement based on Faraday rotation in a no-core tellurite fiber Reviewed

Fan Zhang, Xin Yan, Xuenan Zhang, Fang Wang, Shuguang Li, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng

Optical Fiber Technology 63 102536 - 1 2021.5 （ ISSN:1068-5200 ）

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Publishing type：Research paper (scientific journal) Publisher：Elsevier BV

DOI： 10.1016/j.yofte.2021.102536
A Magnetic Field Sensor Utilizing Tellurite Fiber-Induced Sanac Loop Based on Faraday Rotation Effect and Fresnel Reflection Reviewed

Fan Zhang **, Bin Li **, Yue Sun **, Wei Lin **, Xin Yan **, Xuenan Zhang **, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng **, 他２名 **

IEEE Transactions on instrumentation and measurement 70 7004407 2021.5

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Observation of transverse Anderson localization of mid-infrared light in a chalcogenide transversely disordered optical fiber Reviewed

Asuka Nakatani*, Tong Hoang Tuan, Morio Matsumoto **, Goichi Sakai **, Takenobu Suzuki, Yasutake Ohishi

Proceedings of CLEO2021 JWiA.111 2021.5

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Publishing type：Research paper (international conference proceedings)
No-core optical fiber sensor based on surface plasmon resonance for glucose solution concentration and temperature measurement Reviewed

Bin Li, Xin Yan, Xuenan Zhang, Fang Wang, Shuguang Li, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng

Optics Express 29 ( 9 ) 12930 - 12940 2021.4 （ eISSN:1094-4087 ）

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Publishing type：Research paper (scientific journal) Publisher：The Optical Society

DOI： 10.1364/oe.423307
Simulation of wide wavelength tuning of As2Se3 pi-PSFBG narrow band fiber laser based on temperature and strain Reviewed

Fan Zhang, Xin Yan, Xuenan Zhang, Fang Wang, Shuguang Li, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng

LASER PHYSICS LETTERS 18 ( 4 ) 2021.4 （ ISSN:1612-2011 eISSN:1612-202X ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：IOP PUBLISHING LTD

In this work, the temperature (strain) properties of As2Se3 pi-phase-shift fiber Bragg gratings (pi-PSFBGs) are numerically investigated. The sensing sensitivities are 0.0665 nm degrees C-1 (0.8598 pm mu epsilon(-1)) at 1.55 mu m, 0.1546 nm degrees C-1 (1.9968 pm mu epsilon(-1)) at 3.6 mu m, 0.2717 nm degrees C-1 (3.51 pm mu epsilon(-1)) at 6.328 mu m, and 0.4551 nm degrees C-1 (5.8796 pm mu epsilon(-1)) at 10.6 mu m, and the sensitivities are improved with the increasing Bragg wavelength. Based on them, a high-performance narrow band fiber laser is theoretically proposed. The proposed tunable laser has a wider wavelength adjustment range in mid-infrared region, which can reach 27.306 nm at around 10.6 mu m. Moreover, the obvious Bragg wavelength shift induced by stretching the As2Se3 pi-PSFBG helps widen the tunable range of the laser, making possible a fine tuning. Being simple in structure and high in sensitivity, the proposed laser can be applied in mid-infrared region, which is the fingerprint region of numerous molecules and which closely relates to military aviation, environmental conservation, biology and health care regions.

DOI： 10.1088/1612-202X/abe635
High-birefringence chalcogenide all-solid hybrid microstructured optical fiber and broad mid-infrared parametric gain bandwidth. Reviewed

Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE Optical Components and Materials XVlll 11682 116821G - 1 2021.3

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Multiple Modes-Induced Multi-Pair Cross-Phase Modulation Instability in the Deep Normal Dispersion Regime of a Tellurite High Birefringence Microstructured Optical Fiber Reviewed

Tonglei Cheng, Bin Li, Xiaoyu Chen, Xin Yan, Xuenan Zhang, Fang Wang, Shuguang Li, Takenobu Suzuki, Yasutake Ohishi

IEEE Photonics Journal 13 ( 1 ) 7100409 - 1 2021.2 （ eISSN:1943-0655 ）

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Publishing type：Research paper (scientific journal) Publisher：Institute of Electrical and Electronics Engineers (IEEE)

DOI： 10.1109/jphot.2021.3050181
テルライト・カルコゲナイドガラスを用いたランダム断面構造光ファイバによる赤外イメージ伝送 Reviewed

中谷明日佳*, Tong Hoang Tuan, 畔柳俊英*, 松本守男 **, 堺豪一 **, 鈴木　健伸, 大石　泰丈

信学技報（電子情報通信学会技術研究報告） 17 - 20 2021.2

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Towards absorption spectroscopy by means of mid-infrared supercontinuum generation in a step index tellurite fiber Reviewed

Arnaud Lemiere, Anthony Maldonado, Frédéric Désévédavy, Bertrand Kibler, Pierre Mathey, Grégory Gadret, Jean Charles Jules, Nguyen Phuoc Trung Hoa, Takenobu Suzuki, Yasutake Ohishi, Frédéric Smektala

Laser Physics 31 ( 2 ) 2021.1 （ ISSN:1054-660X eISSN:1555-6611 ）

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We report on mid-infrared gas spectroscopy measurements by means of the supercontinuum (SC) absorption spectroscopy method. We developed a 80 MHz-repetition-rate mid-infrared SC light source with an average power of 40 mW generated through nonlinear propagation of 200 fs pulses in a 10 cm-long segment of step-index tellurite fiber. A compact multipass cell is used for analyzing absorption of CO2 and CH4 gases and their mixture in the 2-3.5 µm spectral range. Experimental results are compared to the HITRAN database.

DOI： 10.1088/1555-6611/abd9af
中赤外ファイバレーザ用ガリウム酸塩ガラスの組成探索 Reviewed

加藤雄也*, 市原拓弥*, 鈴木　健伸, 大石　泰丈

The 31st Meeting on Glasses for Photonics 2021講演予稿集 22 - 23 2021.1

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カルコゲナイド偏波保持ファイバの波長分散抑制 Reviewed

河村英果*, Tong Hoang Tuan, 松本守男 **, 堺豪一 **, 鈴木　健伸, 大石　泰丈

The 31st Meeting on Glasses for Photonics 2021講演予稿集 20 - 21 2021.1

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Sub-picosecond passively mode-locked thulium-doped fiber laser by ReS2 nanoparticles Reviewed

Yong Zhou, Changji Fang, Zhengxiong Zhang, Liang Tong, Xiaohui Ma, Wei Zhang, Ronghua Yu, Weiqing Gao, Jun Xu, Meisong Liao, Takenobu Suzuki, Yasutake Ohishi

JAPANESE JOURNAL OF APPLIED PHYSICS 60 ( 1 ) 2021.1 （ ISSN:0021-4922 eISSN:1347-4065 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：IOP PUBLISHING LTD

Passively mode-locked pulses generated in a thulium-doped fiber laser was demonstrated by the ReS2 nanoparticles. The ReS2 nanoparticles are introduced into the laser cavity on a side polished fiber through optical deposition method, which works as a saturable absorber. Self-starting mode-locking can be established quickly when the pump power is higher than 700 mW. The central wavelength and the 3 dB bandwidth of single pulse operation are 1970.65 and 5.05 nm, respectively. The pulse repetition is 26.1 MHz and the full width at half maximum is 893 fs with the time-bandwidth product of 0.348.
A Miniature Optical Fiber Fabry–Perot Interferometer Temperature Sensor Based on Tellurite Glass Reviewed

Xue Zhou, Xuegang Li, Shuguang Li, Xin Yan, Xuenan Zhang, Fang Wang, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng

IEEE Transactions on Instrumentation and Measurement 70 1 - 6 2021 （ ISSN:0018-9456 eISSN:1557-9662 ）

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Publishing type：Research paper (scientific journal) Publisher：Institute of Electrical and Electronics Engineers (IEEE)

DOI： 10.1109/tim.2021.3101310
A Magnetic Field Sensor Utilizing Tellurite Fiber-Induced Sagnac Loop Based on Faraday Rotation Effect and Fresnel Reflection Reviewed

Fan Zhang, Bin Li, Yue Sun, Wei Liu, Xin Yan, Xuenan Zhang, Fang Wang, Shuguang Li, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng

IEEE Transactions on Instrumentation and Measurement 70 1 - 7 2021 （ ISSN:0018-9456 eISSN:1557-9662 ）

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Publishing type：Research paper (scientific journal) Publisher：Institute of Electrical and Electronics Engineers (IEEE)

DOI： 10.1109/tim.2021.3082275
Experimental investigation of the polarization modulation instability and stimulated Raman scattering in a chalcogenide optical fiber. Reviewed

T. Cheng **, Q. Wang **, X. Yan **, F. Wang **, X. Zhang **, S. Li **, Takenobu Suzuki, Yasutake Ohishi

Journal of Applied Physics 128 193103 - 1 2020.11

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A Refractive Index Sensitive Liquid Level Monitoring Sensor Based on Multimode Interference. Reviewed

F. Zhang **, S. Li **, X. Yan **, X. Zhang **, F. Wang **, Takenobu Suzuki, Yasutake Ohishi, T. Cheng **

Photonics 7 ( 4 ) #89 2020.10

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Experimental investigation of polarization modulation instability in a double-clad single-mode tellurite optical fiber. Reviewed

T. Cheng **, F. Zhang **, S. Li **, X. Yan **, F. Wang **, X. Zhang **, Takenobu Suzuki, Yasutake Ohishi

Applied Physics B 126 ( 11 ) #180 2020.10

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カルコゲナイドランダム断面構造光ファイバよる中赤外光導波 Reviewed

中谷明日佳*, Tong Hoang Tuan, 松本守男 **, 堺豪一 **, 鈴木　健伸, 大石　泰丈

第81回応用物理学会秋季学術講演会予稿集 8p - Z16 2020.9

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Supercontinuum-induced multi-wavelength third-harmonic generation in a suspended-core microstructured optical fiber Reviewed

T. Cheng **, X. Zhou **, Y. Sun **, X. Yan **, X. Zhang **, F. Wang **, S. Li **, Takenobu Suzuki, Yasutake Ohishi

Optics Express 28 ( 20 ) 28750 - 28761 2020.9

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Chalcogenide All-solid Hybrid Microstructured Optical Fiber with Flattened Normal Dispersion and High Birefringence in the mid-IR Region. Reviewed

Tong Hoang Tuan, H. P. T. Nguyen, **, Takenobu Suzuki, Yasutake Ohishi

Proceedings of ICETE2020 93 - 95 2020.7

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Flat supercontinuum generation in tellurite fiber pumped in deep normal dispersion region. Reviewed

シンルオ, Tong Hoang Tuan, H. P. T. Nguyen*, Takenobu Suzuki, Yasutake Ohishi

IEEE Photonics Technology Letters 32 ( 12 ) 718 - 721 2020.6

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Supercontinuum generation in a chalcogenide all-solid hybrid microstructured optical fiber. Reviewed

H. P. T. Nguyen*, Tong Hoang Tuan, シンルオ, M. Matsumoto **, G. Sakai **, Takenobu Suzuki, Yasutake Ohishi

Optics Express 28 ( 12 ) 17539 - 17555 2020.6

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Mid-infrared wavelength conversion using dispersion-engineered As2S5 microstructured optical fiber pumped with an ultrafast laser at 2 µm Reviewed

Than Singh Saini, Tong Hoang Tuan, Morio Matsumoto, Goichi Sakai, Takenobu Suzuki, Yasutake Ohishi

Optics Letters 45 ( 10 ) 2736 - 2736 2020.5 （ ISSN:0146-9592 eISSN:1539-4794 ）

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Publishing type：Research paper (scientific journal) Publisher：The Optical Society

DOI： 10.1364/ol.392149
Intracavity supercontinuum generation in a mode-locked erbium-doped fiber laser based on the Mamyshev mechanism with highly nonlinear fiber Reviewed

Xing Luo, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

Optics Letters 45 ( 9 ) 2530 - 2530 2020.5 （ ISSN:0146-9592 eISSN:1539-4794 ）

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Publishing type：Research paper (scientific journal) Publisher：The Optical Society

DOI： 10.1364/ol.389779
Fabrication of chalcogenide transversely disordered optical fiber for mid-infrared image transport. Reviewed

A. Nakatani*, Tong Hoang Tuan, H. Isai,*, M. Matsumoto **, G. Sakai **, Takenobu Suzuki, Yasutake Ohishi

Proceedings of CLEO2020 JW2E.9 2020.5

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Intracavity supercontinuum generation in mode-locked Er-doped fiber laser based on Mamyshev mechanism. Reviewed

シンルオ, Tong Hoang Tuan, H. P. T. Nguyen **, Takenobu Suzuki, Yasutake Ohishi

Proceedings of CLEO2020 JTu2F.21 2020.5

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Flattened chromatic dispersion and birefringence properties of chalcogenide all-solid hybrid microstructured optical fibers. Reviewed

Tong Hoang Tuan, H. P. Trung Nguyen **, Takenobu Suzuki, Yasutake Ohishi

Proceedings of CLEO2020 JTu - 2B.12 2020.5

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Experimental Demonstration of Mid-Infrared Spontaneous Four-wave Mixing with A Tellurite All-solid Hybrid Microstructured Fiber. Reviewed

H. P. T. Nguyen*, T. S. Saini*, Tong Hoang Tuan, G. Sakai **, M. Matsumoto **, Takenobu Suzuki, Yasutake Ohishi

Proceedings of CLEO2020 JTh2E.10 2020.5

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Experimental investigation of dispersive wave generation and evolution in a tellurite microstructured optical fiber Reviewed

T. Cheng **, F. Zhang **, X. Yan **, X. Zhang **, F. Wang **, S. Li **, Takenobu Suzuki, Yasutake Ohishi

Journal of Applied Physics 127 ( 20 ) 203102 - 1 2020.5

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Mid-infrared wavelength conversion using dispersion-engineered As₂S₅　microstructured optical fiber pumped with an ultrafast laser at 2 μm. Reviewed

T. S. Saini*, Tong Hoang Tuan, M. Matsumoto **, G. Sakai **, Takenobu Suzuki, Yasutake Ohishi

Optics Letters 45 ( 10 ) 2736 - 2739 2020.5

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Intracavity supercontinuum generation in mode-locked erbium-doped fiber laser based on the Mamyshev mechanism with highly nonlinear fiber. Reviewed

シンルオ, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

Optics Letters 45 ( 9 ) 2530 - 2533 2020.5

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Intracavity Supercntinuum Generation in Mode-Locked Er-Doped Fiber Laser Based on Mamyshev Mechanism Reviewed

Xing Luo, Tong Hoang Tuan, Hoa Phuoc Trung Nguyen, Takenobu Suzuki, Yasutake Ohishi

Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS 2020-May 2020.5 （ ISBN:9781943580767 ISSN:1092-8081 ）

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A supercontinuum mode-locked Er-doped laser based on Mamyshev mechanism with a piece of intracavity highly nonlinear fiber is experimentally demonstrated. This mode-locked laser realizes intracavity supercontinuum generation spanning from ∼1300 nm to ∼2100 nm directly.
Switchable dual-wavelength mode-locked fiber laser using Saganc loop mirror Reviewed

Xing Luo, Tong Hoang Tuan, Than Singh Saini, Hoa Phuoc Trung Nguyen, Takenobu Suzuki, Yasutake Ohishi

Optics Communications 463 125457 - 125457 2020.5 （ ISSN:0030-4018 ）

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Publishing type：Research paper (scientific journal) Publisher：Elsevier BV

DOI： 10.1016/j.optcom.2020.125457
Mid-infrared supercontinuum generation with high spectral flatness in dispersion flattened tellurite all-solid hybrid microstructured optical fibers. Reviewed

H. P. T. Nguyen*, Tong Hoang Tuan, M. Matsumoto **, G. Sakai **, Takenobu Suzuki, Yasutake Ohishi

Japanese Journal of Applied Physics 59 ( 4 ) 042002 - 1 2020.3

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All-Fiber Mode-Locked Laser Based on Mamyshev Mechanism With High-Energy Pulse Generation at 1550 nm. Reviewed

シンルオ, Tong Hoang Tuan, タンシンサイニ, H. P. T. Nguyen*, Takenobu Suzuki, Yasutake Ohishi

Journal of Lightwave Technology 38 ( 6 ) 1468 - 1473 2020.3

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Characteristics of vector beams in mid-infrared waveband in an As2Se3 photonic crystal fiber with small hollow core Reviewed

Weiqing Gao, Xiu Zhang, Wenhui Jiang, Zhengxiong Zhang, Panyun Gao, Liang Chen, Peng Wang, Wei Zhang, Rui Wang, Meisong Liao, Takenobu Suzuki, Yasutake Ohishi, Yong Zhou

Optical Fiber Technology 55 102152 - 102152 2020.3 （ ISSN:1068-5200 ）

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Publishing type：Research paper (scientific journal) Publisher：Elsevier BV

DOI： 10.1016/j.yofte.2020.102152
Coherent Mid-IR Supercontinuum Generation using Tapered Chalcogenide Step-Index Optical Fiber: Experiment and modelling. Reviewed

タンシンサイニ, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

Scientific Reports 10 2236 2020.2

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Demonstration of mid-IR supercontinuum generation using all-normal dispersion engineered tapered chalcogenide fiber. Reviewed

タンシンサイニ, H. P. T. Nguyen*, シンルオ, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE Photonics West 2020 112640A - 1 2020.2

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Fabrication of a tellurtie hollow-core optical fiber for mid-infrared transmission. Reviewed

Tong Hoang Tuan, N. Nishiharaguchi*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE Photonics West 2020 112761F - 1 2020.2

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Mid-infrared supercontinuum generation in an all-solid hybrid microstructured optical fiber. Reviewed

H. P. T. Nguyen*, Tong Hoang Tuan, タンシンサイニ, シンルオ, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE Photonics West 2020 112641T - 1 2020.2

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Publishing type：Research paper (international conference proceedings)
Linear Er-doped fiber Mamyshev regenerator with high pulse energy generation. Reviewed

シンルオ, Tong Hoang Tuan, タンシンサイニ, H. P. T. Nguyen*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE Photonics West 2020 1126602E - 1 2020.2

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Switchable dual-wavelength mode-locked fiber laser usimg Saganc loop mirror. Reviewed

シンルオ, Tong Hoang Tuan, タンシンサイニ, H. P. T. Nguyen*, Takenobu Suzuki, Yasutake Ohishi

Optics Communications 463 125457 - 1 2020.2

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Energy transfer in Cr and Nd co-doped Si-B-Na-Al-Ca-Zr-O glasses Reviewed

M.A. Hughes, H. Li, R.J. Curry, T. Suzuki, Y. Ohishi

Journal of Non-Crystalline Solids 530 119769 - 1 2020.2 （ ISSN:0022-3093 ）

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Publishing type：Research paper (scientific journal) Publisher：Elsevier BV

DOI： 10.1016/j.jnoncrysol.2019.119769
Theoretical Investigation of an Alcohol-Filled Tellurite Photonic Crystal Fiber Temperature Sensor Based on Four-Wave Mixing. Reviewed

Y. Sun **, X. Yan **, F. Wang **, X. Zhang **, S. Li **, Takenobu Suzuki, Yasutake Ohishi, T. Cheng **

Sensors 20 ( 4 ) 1007 - 1 2020.2

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Stimulated Brillouin scattering by the interaction between different-order optical and acoustical modes in an As<inf>2</inf>Se<inf>3</inf> photonic crystal fiber Reviewed

Weiqing Gao, Liang Chen, Wenhui Jiang, Zhengxiong Zhang, Xiu Zhang, Panyun Gao, Kang Xie, Wei Zhang, Yong Zhou, Meisong Liao, Takenobu Suzuki, Yasutake Ohishi

Chinese Optics Letters 18 ( 1 ) 2020.1 （ ISSN:1671-7694 ）

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Brillouin gain spectra (BGS) in an As2Se3 photonic crystal fiber (PCF) are investigated numerically. The profiles of the BGS are simulated by calculating the characteristics of different-order optical and acoustic waves in the PCFs with different core diameters. For the small-core PCF, there are two peaks in BGS, but there is only one peak for the large-core PCF. We also reveal that in the small-core PCF, the difference of Brillouin frequency shift between the LP01 and LP11 modes is obvious, while it is not obvious in the large-core PCF. The Brillouin threshold increases with the core diameter increasing.

DOI： 10.3788/COL202018.010602
Characteristics of vector beams in mid-infrared waveband in an As₂Se₃　photonic crystal fiber with small hollow core. Reviewed

W. Gao **, X. Zhang **, W. Jiang **, Z. Zhang **, P. Gao **, M. Liao **, Takenobu Suzuki, Yasutake Ohishi, Y. Zhou **, 他4名*

Optical Fiber Technology 55 102152 - 1 2020.1

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高非線形光ファイバによる広帯域中赤外光の発生 Reviewed

大石　泰丈, 鈴木　健伸

レーザー学会学術講演会第40回年次大会予稿集 S10 - 20ｐ 2020.1

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Authorship：Last author Publishing type：Research paper (international conference proceedings)
Numerical study on mid-infrared optical parametric amplification around 5 µm by injecting signal vector beams in As2Se3 MOFs Reviewed

Weiqing Gao, Peng Wang, Wenhui Jiang, Zhengxiong Zhang, Xiu Zhang, Panyun Gao, Wei Zhang, Meisong Liao, Takenobu Suzuki, Yasutake Ohishi, Yong Zhou

Journal of the Optical Society of America B 36 ( 12 ) 3348 - 3348 2019.12 （ ISSN:0740-3224 eISSN:1520-8540 ）

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Publishing type：Research paper (scientific journal) Publisher：The Optical Society

DOI： 10.1364/josab.36.003348
Fabrication of a tellurite hollow core optical fiber with six non-touching cladding air holes. Reviewed

Tong Hoang Tuan, Nobuhiko Nishiharaguchi*, Takenobu Suzuki, Yasutake Ohishi

Journal of the Ceramic Society of Japan 127 ( 12 ) 918 - 923 2019.12

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Numerical study on mid-infrared optical parametric amplification around 5 μm by injecting signal vector beams in As₂Se₃ MOFs. Reviewed

W. Gao **, P. Wang **, W. Jiang **, Z. Zhang **, X. Zhang **, M. Liao **, Takenobu Suzuki, Yasutake Ohishi, Y. Zhou **, 他2名*

Journal of the Optical Society of America B 36 ( 12 ) 3348 - 3356 2019.12

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Mid-infrared vector beams in selenide photonic crystal fiber with small hollow core and its application on supercontinuum generation Reviewed

Xiu Zhang, Wenhui Jiang, Zhengxiong Zhang, Panyun Gao, Liang Chen, Peng Wang, Wei Zhang, Yong Zhou, Meisong Liao, Takenobu Suzuki, Yasutake Ohishi, Weiqing Gao

Quantum and Nonlinear Optics VI 2019.11

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Publishing type：Research paper (international conference proceedings) Publisher：SPIE

DOI： 10.1117/12.2537281
Fabrication of a tellurite hollow core optical fiber for mid-infrared transmission. Reviewed

Tong Hoang Tuan, N. Nishiharaguchi*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of 6th International Workshop on Specialty Optical Fiber and Their Applications 112061K - 1 2019.11

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Noise-like pulse pumped all-fiber supercontinuum laser source. Reviewed

シンルオ, Tong Hoang Tuan, タンシンサイニ, H. P. T. Nguyen*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of 6th International Workshop on Specialty Optical Fiber and Their Applications 112061N - 1 2019.11

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Ultrafast All-Optical Signal Modulation Induced by Optical Kerr Effect in a Tellurite Photonic Bandgap Fiber. Reviewed

T. Cheng **, F. Zhang **, S. Tanaka*, S. Li **, X. Yan **, X. Zhang **, Takenobu Suzuki, Yasutake Ohishi

Photonics 6 ( 113 ) 2019.10

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Mid-infrared transmission by a tellurite hollow core optical fiber. Reviewed

Tong Hoang Tuan, N. Nishiharaguchi*, Takenobu Suzuki, Yasutake Ohishi

Optics Express 27 ( 21 ) 30576 - 30588 2019.10

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Highly coherent supercontinuum generation in chalcogenide all-solid hybrid microstructured optical fibers. Reviewed

H. P. T. Nguyen*, Tong Hoang Tuan, タンシンサイニ, Takenobu Suzuki, Yasutake Ohishi

Proceedings of OSA Laser Congress 2019 JM5A.18 2019.10

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Mid-infrared vector beams in slelenide photonic crystal fiber with small hollow core and their application on supercontinuum generation. Reviewed

X. Zhang **, W. Jiang **, Z. Zhang **, P. Gao **, L.Chen **, P. Wang **, Takenobu Suzuki, Yasutake Ohishi, W. Gao **, 他3名*

Proceedings of SPIE Photonics Asia 2019 111950V - 1 2019.10

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Highly coherent supercontinuum generation in chalcogenide all-solid hybrid microstructured optical fibers. Reviewed

H. P. T. Nguyen*, Tong Hoang Tuan, タンシンサイニ, Takenobu Suzuki, Yasutake Ohishi

Proceedings of OSA Laser Congress 2019 JM5A.18 2019.10

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Nd³⁺ - doped tellurite all solid photonic bandgap fiber with one-dimensional asymmetric periodic structure. Reviewed

Tong Hoang Tuan, K. Suzaki*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of OSA Laser Congress 2019 JW2A.5 2019.10

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Highly efficient second harmonic generation in a tellurite optical fiber. Reviewed

T. Cheng **, Y. Xiao **, S. Li **, X. Yan **, X. Zhang **, Takenobu Suzuki, Yasutake Ohishi

Optics Letters 44 ( 9 ) 4686 - 4689 2019.10

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Propagation of mid-infrared light in a tellurite hollow core optical fiber with non-touching capillary tubes. Reviewed

Tong Hoang Tuan, N. Nishiharaguchi*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of FiO+LS2019 FM3C.2 2019.9

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低融点ガラス特殊ファイバの作製と赤外応用 Reviewed

鈴木　健伸, 大石　泰丈

2019年電子情報通信学会通信ソサイエティ大会講演論文集 SS167 - SS168 2019.9

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Demonstration of an all-fiber dual-wavelength mode locked laser based on Lyot filtering effect. Reviewed

シンルオ, Tong Hoang Tuan, タンシンサイニ, H. Nguyen*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of FiO+LS2019 JW4A.40 2019.9

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Multi-wavelength fiber laser generated by Brillouin-comb assisted four-wave mixing Reviewed

Peng Wang, Liang Chen, Xiu Zhang, Panyun Gao, Zhengxiong Zhang, Wenhui Jiang, Wei Zhang, Yong Zhou, Meisong Liao, Takenobu Suzuki, Yasutake Ohishi, Weiqing Gao

Optics Communications 444 63 - 67 2019.8 （ ISSN:0030-4018 ）

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In this work, we demonstrate a wide-spectrum multi-wavelength fiber laser generated by Brillouin-comb assisted four-wave mixing (FWM). The mechanism of the laser is based on the combination of stimulated Brillouin scattering in cavity and multiple FWM process outside cavity. The experiment results demonstrate that Brillouin-comb assisting is an effective method to improve the FWM process and increase the line number. More than 110 lines are achieved in 10 nm spectral range with the wavelength spacing of ∼0.09 nm. The multi-wavelength fiber laser exhibits good stability on both the operating wavelengths and output power. The tunability of this multi-wavelength fiber laser is improved significantly by inserting a tunable filter in the cavity. The total line number is kept more than 110 in the whole tunable range of 30 nm from 1540 to 1570 nm.

DOI： 10.1016/j.optcom.2019.03.053
All-fiber supercontinuum source pumped by noise-like pulse mode locked laser. Reviewed

シンルオ, Tong Hoang Tuan, タンシンサイニ, H. P. T. Nguyen*, Takenobu Suzuki, Yasutake Ohishi

IEEE Photonics Technology Letters 31 ( 15 ) 1225 - 1228 2019.8

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The Reduction of 1.06-μm Emission in a Double Cladding Tellurite All-solid Photonic Bandgap Fiber Doped with Neodymium Ions. Reviewed

Tong Hoang Tuan, K. Suzaki*, N. Nishiharaguchi*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of ICETE2019(16th International Joint Conference on e-Business and Telecommunications) 271 - 274 2019.7

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Multi-wavelength Brillouin-erbium fiber laser with more than 95 lines based on a dual-ring structure. Reviewed

W. Gao **, P. Gao **, X. Zhang **, Z. Zhang **, W. Jiang **, Y. Zhou **, W. Zhang **, Yasutake Ohishi, Takenobu Suzuki, その他5名 **

Japanese Journal of Applied Physics 58 ( 8 ) 082003 - 1 2019.7

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Tellrite all-solid hybrid microstructured optical fibers for highly coherent mid-infrared supercontinuum generation. Reviewed

H.P. T. Nguyen*, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC) WP4 - C11 2019.7

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Tellurite all-solid hybrid microstructured optical fibers for highly coherent mid-infrared supercontinuum generation Reviewed

Hoa Phuoc Trung Nguyen, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC) 2019.7

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Publishing type：Research paper (international conference proceedings) Publisher：IEEE

DOI： 10.23919/ps.2019.8817845
A tellurite all-solid hybrid microstructured fiber with ultra-small chromatic dispersion fluctuation Reviewed

Hoa Phuoc Trung Nguyen, Hoang Tuan Tong, Than Singh Saini, Xing Luo, Takenobu Suzuki, Yasutake Ohishi

2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019 CD - P.30 2019.6 （ ISBN:9781728104690 ）

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We report a tellurite all-solid hybrid microstructured fiber with ultra-small chromatic dispersion fluctuation which has the potential as mid-infrared fiber optical parametric amplifier medium.

DOI： 10.1109/CLEOE-EQEC.2019.8872363
Dual –wavelength dual-comb mode locked Er-doped fiber laser based on Saganc fiber loop mirror. Reviewed

シンルオ, Tong Hoang Tuan, タンシンサイニ, H. Nguyen*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of CLEO Europe-EQEC 2019 CJ - P.56 2019.6

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Cascaded stimulated raman scattering in a chalcogenide optical fiber Reviewed

Tonglei Cheng, Shuguang Li, Xin Yan, Takenobu Suzuki, Yasutake Ohishi

2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019 CJ - P.36 2019.6 （ ISBN:9781728104690 ）

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Stimulated Raman scattering (SRS) is a nonlinear effect in the media which can transfer a fraction of power from one optical field to another and whose frequency is downshifted by an amount determined by the vibrational modes of the medium [1, 2]. When Raman gain of the optical fiber is high and pump power into it is sufficient, cascaded SRS effect can be achieved [3, 4]. In this paper, a low-loss chalcogenide optical fiber was designed and fabricated based on AS-S glass, and a 16 m long fiber was experimentally used to enhance Raman gain for boosting cascaded SRS generation. A nanosecond laser at ∼1545 nm was used as the pump source and mid-infrared cascaded SRS up to eight orders was observed.

DOI： 10.1109/CLEOE-EQEC.2019.8873171
Suppressing 1.06 μm emission of Nd³⁺ ions in tellurite all solid photonic bandgap fibers with double cladding Reviewed

Tong Hoang Tuan, Kou Miura, Nobuhiko Nishiharaguchi, Takenobu Suzuki, Yasutake Ohishi

2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019 CE - P.12 2019.6 （ ISBN:9781728104690 ）

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Neodymium (Nd3+) ion has been known as a potential rare-earth ion for optical fiber amplifiers operating near the 1.33-μm spectral region due to its 4F3/2→4I13/2 transition [1, 2]. However, the use of the 1.33-μm emission from Nd3+ ions has faced a major problem due to the existence of the amplified spontaneous emission (ASE) at 1.06 μm due to the 4F3/2→4I11/2 transition whose branching ratio is about 5 times larger. Recently, an all-solid photonic bandgap fiber (ASPBF) was demonstrated with prohibited transmission bands of the propagated light. The control of photonic bandgap (PB) enables a variety of applications ranging from tunable bandpass filters to nonlinear optical devices [3]. In addition, ASPBFs are easier to be fabricated and have higher mechanical stability due to the absence of air-hole structures as compared to conventional holey photonic bandgap fibers. Therefore, we propose in this work tellurite ASPBFs with double cladding to suppress the 1.06-μm ASE of Nd3+ ions when they are excited by the pump around 0.8 μm.

DOI： 10.1109/CLEOE-EQEC.2019.8872843
Coherent Mid-IR Supercontinuum Generation using Tapered Chalcogenide Step-Index Fiber. Reviewed

H. P. T. Nguyen*, タンシンサイニ, シンルオ, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference CD - P.32 2019.6

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Dual-wavelength dual-comb mode locked Er-doped fiber laser based on saganc fiber loop mirror Reviewed

Xing Luo, Tong Hoang Tuan, Than Singh Saini, Hoa Phuoc Trung Nguyen, Takenobu Suzuki, Yasutake Ohishi

2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019 2019.6 （ ISBN:9781728104690 ）

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We report an all-fiber dual-wavelength dual-comb mode locked fiber laser based on a Sagnac fiber loop mirror. Two asynchronous mode locked pulse trains with repetition rate difference of 218 Hz was realized.

DOI： 10.1109/CLEOE-EQEC.2019.8872965
Broadband high-power mid-IR supercontinuum generation in tapered chalcogenide step-index optical fiber Reviewed

Than Singh Saini, Hoa Phuoc Trung Nguyen, Xing Luo, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

OSA Continuum 2 ( 5 ) 1652 - 1666 2019.5 （ eISSN:2578-7519 ）

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We report a design, analysis, and numerical modeling of a tapered chalcogenide step-index fiber for broadband high-power mid-infrared supercontinuum extending from the 1.5-14.5 μm molecular 'fingerprint region'. The reported tapered chalcogenide fiber structure is able to generate a broadband supercontinuum spectrum with output average power of 82mW (27.7mW for the wavelengths >5 μm) when it is pumped with 200 fs laser pulses with a repetition rate of 76MHz and average power of 200mW at 3.5 μm. Such a bright and broadband mid-infrared supercontinuum light source covering both the 3-5 μm and 8-13 μm atmospheric windows and most of the molecular fingerprint spectral region has practical applications in various fields, including mid-infrared spectroscopy, imaging, and biomedical diagnostics.

DOI： 10.1364/OSAC.2.001652
Erratum: Highly coherent supercontinuum generation in a tellurite all-solid hybrid microstructured fiber pumped at 2 μm (Applied Physics Express (2019) 12 (042010) DOI: 10.7567/1882-0786/ab0aac) Reviewed

Hoa Phuoc Trung Nguyen, Tuan Hoang Tong, Than Singh Saini, Xing Luo, Takenobu Suzuki, Yasutake Ohishi

Applied Physics Express 12 ( 5 ) 2019.5 （ ISSN:1882-0778 eISSN:1882-0786 ）

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Due to an oversight in the production process the unit of chromatic dispersion is incorrect in the above article. The correct unit is ps/km nm-1.

DOI： 10.7567/1882-0786/ab16c0
Tunable and switchable all-fiber dual-wavelength mode locked laser　based　on　Lyot　filtering　effect. Reviewed

シンルオ, Tong Hoang Tuan, タンシンサイニ, H. P. T. Nguyen*, Takenobu Suzuki, Yasutake Ohishi

Optics Express 27 ( 10 ) 14635 - 14647 2019.5

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Demonstration of the Coherent Mid-IR Supercontinuum Generation in Tapered Tellurite Fiber. Reviewed

タンシンサイニ, H. P. T. Nguyen*, シンルオ, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

Proceedings of CLEO2019 JW2A.93 2019.5

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Light propagation properties of a novel tellurite hollow-core fiber with single hexagonal air-hole layer. Reviewed

Tong Hoang Tuan, N. Nishiharaguchi*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of CLEO2019 JW2A.96 2019.5

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Experimental Demonstration of Highly Coherent Near to Mid-Infrared Supercontinuum Generation with All-solid Hybrid Microstructured Tellurite Fiber. Reviewed

H. P. T. Nguyen*, Tong Hoang Tuan, シンルオ, タンシンサイニ, Takenobu Suzuki, Yasutake Ohishi

Proceedings of CLEO2019 JW2A.109 2019.5

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Multi-octave-spanning supercontinuum generation in lead fluoride crystal. Reviewed

Y. Yang **, H. Cai **, M. Liao **, Yasutake Ohishi, W. Bi **, X. Li **, Takenobu Suzuki

Proceedings of CLEO2019 JTu2A.91 2019.5

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Highly coherent supercontinuum generation in a tellurite all-solid hybrid microstructured fiber pumped at 2 μm Reviewed

Hoa Phuoc Trung Nguyen, Tuan Hoang Tong, Than Singh Saini, Xing Luo, Takenobu Suzuki, Yasutake Ohishi

Applied Physics Express 12 ( 4 ) 042010 - 042010 2019.4 （ ISSN:1882-0778 eISSN:1882-0786 ）

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DOI： 10.7567/1882-0786/ab0aac

Other Link： http://iopscience.iop.org/article/10.7567/1882-0786/ab0aac/pdf
Fabrication of a novel tellurite hollow core optical fiber. Reviewed

Tong Hoang Tuan, N. Nishiharaguchi*, Takenobu Suzuki, Yasutake Ohishi

Journal of the Ceramic Society of Japan 127 ( 4 ) 187 - 190 2019.4

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Design and numerical investigation of a tapered tellurite step-index fiber for mid-IR supercontinuum generation Reviewed

Than Singh Saini, Trung Hoa Nguyen Phuoc, Xing Xing, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

Nonlinear Frequency Generation and Conversion: Materials and Devices XVIII 2019.3

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Publishing type：Research paper (international conference proceedings) Publisher：SPIE

DOI： 10.1117/12.2509028
Ultra-flattened chromatic dispersion in all-solid hybrid micro-structured optical fibers for mid-infrared lightwave generation Reviewed

Trung Hoa Nguyen Phuoc, Tong Hoang Tuan, Than Singh Saini, Xing Luo, Takenobu Suzuki, Yasutake Ohishi

Nonlinear Frequency Generation and Conversion: Materials and Devices XVIII 2019.3

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DOI： 10.1117/12.2509006
Correction to: Investigation on four-wave mixing toward mid-infrared waveband in tellurite photonic crystal fiber (Optical and Quantum Electronics, (2018), 50, 12, (415), 10.1007/s11082-018-1680-0) Reviewed

Peng Wang, Liang Chen, Xiu Zhang, Panyun Gao, Yong Zhou, Wei Zhang, Jigang Hu, Meisong Liao, Takenobu Suzuki, Yasutake Ohishi, Weiqing Gao

Optical and Quantum Electronics 51 ( 3 ) 2019.3 （ ISSN:0306-8919 eISSN:1572-817X ）

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After publication of the paper, the authors realized that the signal gain in Fig. 6b, d, f was calculated using Gs = 10ln[Ps(L)/Ps(0)].

DOI： 10.1007/s11082-019-1789-9
Ultra-ﬂattened chromatic dispersion in all-solid hybrid micro-structured optical fbers for mid-infrared lightwave generation. Reviewed

Hoa Phuoc Trung Nguyen*, Tong Hoang Tuan, タンシンサイニ, シンルオ, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE Photonics West 2019 10902 109021Q - 1 2019.3

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Group velocity locked vector soliton and polarization rotation vector soliton generation in a birefringence enhanced fber laser. Reviewed

シンルオ, Tong Hoang Tuan, タンシンサイニ, Hoa Phuoc Trung Nguyen*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE Photonics West 2019 108972G - 1 2019.3

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26. Trung Hoa Nguyen, Phuoc, Tong Hoang Tuan, Than Singh Saini, Xing Luo, Takenobu Suzuki, Yasutake Ohishi, “Ultra-ﬂattened chromatic dispersion in all-solid hybrid micro-structured optical fbers for mid-infrared lightwave generation”, Reviewed

Hoa Phuoc Trung Nguyen*, Tong Hoang Tuan, タンシンサイニ, シンルオ, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE Photonics West 2019 109021Q - 1 2019.3

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Tailoring bandgap transmission spectra of new neodymium-doped tellurite all-solid photonic bandgap fbers with double cladding layers. Reviewed

Tong Hoang Tuan, Kohei Suzaki*, Nobuhiko Nishiharaguchi*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE Photonics West 2019 109141O - 1 2019.3

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Numerical investigation on local confnement of infrared light in chalcogenide transversely-disordered optical fbers. Reviewed

Takenobu Suzuki, Asuka Nakatani*, Tong Hoang Tuan, Yasutake Ohishi

Proceedings of SPIE Photonics West 2019 109141J - 1 2019.3

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W-type co-axial chalcogenide optical fber for coherent mid-IR supercontinuum generation. Reviewed

タンシンサイニ, Hoa Phuoc Trung Nguyen*, シンルオ, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE Photonics West 2019 109081A - 1 2019.3

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Design and numerical investigation of a tapered tellurite step-index fber for mid-IR supercontinuum generation. Reviewed

タンシンサイニ, Hoa Phuoc Trung Nguyen*, シンルオ, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE Photonics West 2019 109021R - 1 2019.3

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Highly coherent supercontinuum generation in a tellurite all-solid hybrid microstructured fiber pumped at 2 µm. Reviewed

Hoa Phuoc Trung Nguyen*, Tong Hoang Tuan, タンシンサイニ, シンルオ, Takenobu Suzuki, Yasutake Ohishi

Applied Physics Express 12 042010 - 1 2019.3

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Highly coherent supercontinuum generation in a tellurite all-solid hybrid microstructured fiber pumped at 2 µm. Reviewed

Hoa Phuoc Trung Nguyen*, Tong Hoang Tuan, タンシンサイニ, シンルオ, Takenobu Suzuki, Yasutake Ohishi

Applied Physics Express 12 042010 - 1 2019.3

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Group velocity locked vector soliton and polarization rotation vector soliton generation in a birefringence enhanced fber laser. Reviewed

シンルオ, Tong Hoang Tuan, タンシンサイニ, Hoa Phuoc Trung Nguyen*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE Photonics West 2019 10897 108972G - 1 2019.3

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Design and numerical investigation of a tapered tellurite step-index fber for mid-IR supercontinuum generation. Reviewed

タンシンサイニ, Nguyen Phuoc Trung Hoa*, シンルオ, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE Photonics West 2019 10902 109021R - 1 2019.3

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W-type co-axial chalcogenide optical fber for coherent mid-IR supercontinuum generation. Reviewed

タンシンサイニ, Hoa Phuoc Trung Nguyen*, シンルオ, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE Photonics West 2019 10908 109081A - 1 2019.3

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Numerical investigation on local confnement of infrared light in chalcogenide transversely-disordered optical fbers. Reviewed

Takenobu Suzuki, Asuka Nakatani*, Tong Hoang Tuan, Yasutake Ohishi

Proceedings of SPIE Photonics West 2019 10914 109141J - 1 2019.3

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Tailoring bandgap transmission spectra of new neodymium-doped tellurite all-solid photonic bandgap fbers with double cladding layers. Reviewed

Tong Hoang Tuan, Kohei Suzaki*, Nobuhiko Nishiharaguchi*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE Photonics West 2019 10914 109141O - 1 2019.3

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Numerical investigation on local confinement of infrared light in chalcogenide transversely disordered optical fibers Reviewed

Takenobu Suzuki, Asuka Nakatani, Tong Hoang Tuan, Yasutake Ohishi

Optical Components and Materials XVI 2019.2

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Publishing type：Research paper (international conference proceedings) Publisher：SPIE

DOI： 10.1117/12.2507089
Tailoring bandgap transmission spectra of new neodymium-doped tellurite all-solid photonic bandgap fibers with double cladding layers Reviewed

Hoang Tuan Tong, Kohei Suzaki, Nobuhiko Nishiharaguchi, Takenobu Suzuki, Yasutake Ohishi

Optical Components and Materials XVI 2019.2

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Publishing type：Research paper (international conference proceedings) Publisher：SPIE

DOI： 10.1117/12.2508186
Group velocity locked vector soliton and polarization rotation vector soliton generation in a highly birefringent fiber laser Reviewed

Xing Luo, Tong Hoang Tuan, Than Singh Saini, Hoa Phuoc Trung Nguyen, Takenobu Suzuki, Yasutake Ohishi

Japanese Journal of Applied Physics 58 ( 2 ) 020910 - 020910 2019.2 （ ISSN:0021-4922 eISSN:1347-4065 ）

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Publishing type：Research paper (scientific journal) Publisher：IOP Publishing

DOI： 10.7567/1347-4065/aafc1e

Other Link： http://stacks.iop.org/1347-4065/58/i=2/a=020910?key=crossref.a1f6ce74827cfd930e11f9932394e5e5
Characteristics of forward stimulated Brillouin scattering effect in silica fibers with different microstructures Reviewed

Liang Chen, Wei Zhang, Panyun Gao, Peng Wang, Xiu Zhang, Yong Zhou, Jigang Hu, Meisong Liao, Takenobu Suzuki, Yasutake Ohishi, Weiqing Gao

Optik 179 82 - 88 2019.2 （ ISSN:0030-4026 ）

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Publishing type：Research paper (scientific journal) Publisher：Elsevier BV

DOI： 10.1016/j.ijleo.2018.10.185
Characterization of an all-solid disordered tellurite glass optical fiber and its NIR optical image transport. Reviewed

Tong Hoang Tuan, Shunei Kuroyanagi*, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

Japanese Journal of Applied Physics 58 032005 - 1 2019.2

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Tapered tellurite step-index optical fiber for coherent near-to-mid-IR supercontinuum generation: experiment and modeling Reviewed

Than Singh Saini, Nguyen Phuoc Trung Hoa, Tong Hoang Tuan, Xing Luo, Takenobu Suzuki, Yasutake Ohishi

Applied Optics 58 ( 2 ) 415 - 421 2019.1 （ ISSN:1559-128X eISSN:2155-3165 ）

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Publishing type：Research paper (scientific journal) Publisher：The Optical Society

DOI： 10.1364/ao.58.000415
Group velocity locked soliton and polarization rotation vector soliton generation in a highly birefringent fiber laser. Reviewed

シンルオ, Tong Hoang Tuan, タンシンサイニ, Hoa Phuoc Trung Nguyen*, Takenobu Suzuki, Yasutake Ohishi

Japanese Journal of Applied Physics 58 020910 - 1 2019.1

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赤外イメージ伝送用ランダム断面構造光ファイバ Reviewed

鈴木　健伸, 畔柳駿介*, Tong Hoang Tuan, 大石　泰丈

The 29th Meeting on Glasses for Photonics　講演予稿集 5 - 6 2019.1

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フォトニックバンドギャップの動的制御による超高速光変調 Reviewed

大石　泰丈, 田中駿太*, Tong Hoang Tuan, Tonglei Cheng*, 鈴木　健伸

The 29th Meeting on Glasses for Photonics　講演予稿集 3 - 4 2019.1

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フォトニックバンドギャップの動的制御による超高速光変調 Reviewed

大石　泰丈, 田中駿太*, Tong Hoang Tuan, Tonglei Cheng*, 鈴木　健伸

The 29th Meeting on Glasses for Photonics　講演予稿集 3 - 4 2019

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赤外イメージ伝送用ランダム断面構造光ファイバ Reviewed

鈴木　健伸, 畔柳駿介*, Tong Hoang Tuan, 大石　泰丈

The 29th Meeting on Glasses for Photonics　講演予稿集 5 - 6 2019

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Group velocity locked vector soliton and polarization rotation vector soliton generation in a birefringence enhanced fiber laser Reviewed

Xing Luo, Tong Hoang Tuan, Than Singh Saini, Hoa Phuoc Trung Nguyen, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE - The International Society for Optical Engineering 10897 2019 （ ISBN:9781510624368 ISSN:0277-786X eISSN:1996-756X ）

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A linear mode-locked fiber laser based on the semiconductor saturable absorption mirror was demonstrated to realize mode locking in group velocity locked vector soliton regime and polarization rotation vector soliton regime. The highly fixed birefringence was introduced into the linear fiber laser cavity by using a piece of polarization maintaining Erdoped fiber. The vector nature of pulse of the mode-locked fiber laser was experimentally studied. It turned out that, this birefringence enhanced mode-locked fiber laser can generate both group velocity locked vector soliton and polarization rotation vector soliton though slightly changing the birefringence of the laser cavity. The experimental results reveal the fundamental physics of group-velocity locked vector soliton and polarization rotation vector soliton generation and demonstrate that the linear birefringence enhanced fiber laser is a good platform for investigating the vector soliton.

DOI： 10.1117/12.2509035
Nd3+-doped tellurite all solid photonic bandgap fiber with one-dimensional asymmetric periodic structure Reviewed

Tong Hoang Tuan, Kohei Suzaki, Takenobu Suzuki, Yasutake Ohishi

Laser Congress 2019 (ASSL, LAC, LS&C) 2019

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Publishing type：Research paper (international conference proceedings) Publisher：OSA

DOI： 10.1364/assl.2019.jw2a.6
W-type co-axial chalcogenide optical fiber for coherent mid-IR supercontinuum generation Reviewed

Than Singh Saini, Hoa Phuoc Trung Nguyen, Xing Luo, Tong Hoang Tong, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE - The International Society for Optical Engineering 10908 2019 （ ISBN:9781510624580 ISSN:0277-786X eISSN:1996-756X ）

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A W-type co-axial chalcogenide optical fiber structure is designed and numerically analysed for the broadband and highly coherent supercontinuum sources in the mid-IR region. The structural parameters of the designed W-type optical fiber are optimized to obtain small absolute group velocity dispersion in broad spectral range in the mid-IR region. The proposed W-type fiber structure possesses a flat dispersion profile with the flatness of the dispersion of ±2.45 ps/nm/km in the spectral range of 4.9 - 12.6 μm. The broadband and coherent mid-IR supercontinuum spectrum extending from 2.28 μm to 15.52 μm at -40 dB level is obtained using a 4 cm long chalcogenide W-type fiber pumped by 200 fs laser pulse of peak power of 10 kW at 7 μm. The average coherence property of the supercontinuum spectrum is almost unity in the full spectral range for the chalcogenide W-type fiber. Such broad and highly coherent mid-IR supercontinuum spectrum is very important because most of the biological tissue possesses their molecular fingerprints within this spectral range. Therefore, this region of electromagnetic spectrum is extremely useful to determine a tissue spectral map which provides very important information concerning the existence of the critical diseases such as cancer. The W-type chalcogenide fiber structure reported in this paper is a promising candidate for the development of the coherent broadband mid-IR supercontinuum sources which have potential applications in early cancer diagnostic, food quality control, gas sensing, and imaging.

DOI： 10.1117/12.2509023
Practical sensing approach based on surface plasmon resonance in a photonic crystal fiber Reviewed

Xue Zhou, Tonglei Cheng, Shuguang Li, Takenobu Suzuki, Yasutake Ohishi

OSA Continuum 1 ( 4 ) 1332 - 1340 2018.12 （ eISSN:2578-7519 ）

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Publishing type：Research paper (scientific journal) Publisher：The Optical Society

DOI： 10.1364/osac.1.001332
Chalcogenide W-type co-axial optical fiber for broadband highly coherent mid-IR supercontinuum generation. Reviewed

タンシンサイニ, Nguyen Puoc Trung Hoa*, シンルオ, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

Journal of Applied Physics 124 ( 21 ) 213101 - 1 2018.12

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Investigation on four-wave mixing toward mid-infrared waveband in tellurite photonic crystal fiber Reviewed

Peng Wang, Liang Chen, Xiu Zhang, Panyun Gao, Yong Zhou, Wei Zhang, Jigang Hu, Meisong Liao, Takenobu Suzuki, Yasutake Ohishi, Weiqing Gao

Optical and Quantum Electronics 50 ( 12 ) 2018.12 （ ISSN:0306-8919 eISSN:1572-817X ）

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Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media LLC

DOI： 10.1007/s11082-018-1680-0

Other Link： http://link.springer.com/content/pdf/10.1007/s11082-018-1680-0.pdf
Brillouin comb generation in a ring cavity with tellurite single mode fiber Reviewed

Xing Luo, Tong Hoang Tuan, Than Singh Saini, Hoa Phuoc Trung Nguyen, Takenobu Suzuki, Yasutake Ohishi

Optics Communications 426 54 - 57 2018.11 （ ISSN:0030-4018 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：Elsevier B.V.

We experimentally demonstrate tunable Brillouin comb generation in a ring cavity composed of a piece of tellurite single mode fiber. The tunable Brillouin comb lines are separated with frequency space of 7.9 GHz, which is equal to the Brillouin frequency shift in the tellurite fiber. Due to the high Brillouin gain coefficient of the tellurite fiber, a tellurite fiber as short as 200 m was inserted into the ring cavity. Cascaded stimulated Brillouin Stokes and anti-Stokes lines are generated in the ring cavity leading to multi-wavelength Brillouin comb generation bi-directionally. By tuning the narrow-linewidth tunable laser, we can tune the Brillouin comb in the wide range of 1533 nm to 1565 nm.

DOI： 10.1016/j.optcom.2018.05.024
Brillouin Comb Generation in a Half-open Fiber Laser with a Tellurite Single-Mode Fiber. Reviewed

シンルオ, Tong Hoang Tuan, タンシンサイニ, Hoa Phuoc Trung Nguyen*, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest (Optical Society of America, 2018) ATh2A.32 2018.11

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Experimental Demonstration of the Coherent Mid-IR Supercontinuum Source Using All-normal Dispersion Engineered Tellurite Fiber. Reviewed

タンシンサイニ, Tong Hoang Tuan, Nguyen Phuoc Trang Hoa*, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest (Optical Society of America, 2018) ATu2A.26 2018.11

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Maintaining high performance of optical parametric amplification in a chalcogenide hybrid microstructured optical fiber. Reviewed

Tong Hoang Tuan, Nguyen Phuoc Trung Hoa*, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest (Optical Society of America, 2018) ATu2A 2018.11

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Dispersion-Engineered Step-Index Tellurite Fibers for Mid-Infrared Coherent Supercontinuum Generation from 1.5 to 4.5 μm with Sub-Nanojoule Femtosecond Pump Pulses Reviewed

Paul Froidevaux, Arnaud Lemière, Bertrand Kibler, Frédéric Désévédavy, Pierre Mathey, Grégory Gadret, Jean-Charles Jules, Kenshiro Nagasaka, Takenobu Suzuki, Yasutake Ohishi, Frédéric Smektala

Applied Sciences 8 ( 10 ) 1875 - 1875 2018.10 （ eISSN:2076-3417 ）

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Publishing type：Research paper (scientific journal) Publisher：MDPI AG

Mid-infrared supercontinuum generation from 1.5 to 4.5 µm with sub-nanojoule femtosecond pump pulses is demonstrated by using a short segment of dispersion-engineered step-index tellurite fiber with very low OH content. Distinct group-velocity dispersion regimes in a simple design of step-index tellurite fiber are also reported, which allows to choose the nonlinear pulse propagation regime according to the required tailoring of the supercontinuum source. Numerical simulations based on the generalized nonlinear Schrödinger equation are used to determine optimized fiber parameters before experimental demonstrations. We also analyse the coherence properties of the resulting supercontinuum sources.

DOI： 10.3390/app8101875
テルライト中空コア光ファイバの伝搬特性 Reviewed

西原口寅彦*, Tong Hoang Tuan, 鈴木　健伸, 大石　泰丈

第79回応用物理学会秋季学術講演会　講演予稿集 2018.9

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Frequency combs generation in a linear half-open erbium Brillouin fiber laser with a tellurite single mode fiber. Reviewed

シンルオ, Tong Hoang Tuan, タンシンサイニ, H.P.T. Nguyen*, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

Book of Abstracts: Advanced Architectures in Photonics 2018 M11+ 2018.9

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Propagation of a supercontinuum light source in a novel tellurite hollow core optical fiber. Reviewed

Tong Hoang Tuan, Nobuhiko Nishiharaguchi*, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest (Optical Society of America, 2018) JTu3A.72 2018.9

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Coherent Mid-infrared Supercontinuum Generation Using All Solid Hybrid Micro-structured Tellurite Fibers. Reviewed

Hoa Phuoc Trung Nguyen*, Tong Hoang Tuan, タンシンサイニ, シンルオ, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest (Optical Society of America, 2018) JW3A.42 2018.9

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Design and Modeling of a Chalcogenide Taper Fiber for High Average Power Supercontinuum Generation. Reviewed

タンシンサイニ, Nguyen Phuoc Trung Hoa*, Tong Hoang Tuan, シンルオ, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest (Optical Society of America, 2018) JW4A.39 2018.9

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Brillouin Comb Generation in a Highly Nonlinear Tellurite Single Mode Fiber. Reviewed

シンルオ, Tong Hoang Tuan, タンシンサイニ, Hoa Phuoc Trung Nguyen*, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest (Optical Society of America, 2018) JW4A.33 2018.9

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Coherent mid-infrared supercontinuum spectrum using a step-index tellurite fiber with all-normal dispersion. Reviewed

タンシンサイニ, Tong Hoang Tuan, シンルオ, Nguyen Phuoc Trung Hoa*, Takenobu Suzuki, Yasutake Ohishi

Applied Physics Express 11 10251 - 1 2018.8

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Spacing-adjustable multi-wavelength erbium-doped fiber laser using a fiber Michelson interferometer Reviewed

シンルオ, Tong Hoang Tuan, タンシンサイニ, Hoa Phuoc Trung Nguyen*, Takenobu Suzuki, Yasutake Ohishi

Applied Physics Express 11 082501 - 1 2018.7

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Highly coherent supercontinuum in the mid-infrared region with cascaded tellurite and chalcogenide fibers. Reviewed

Hoa Phuoc Trung Nguyen*, Kenshiro Nagasaka*, Tong Hoang Tuan, タンシンサイニ, シンルオ, Takenobu Suzuki, Yasutake Ohishi

Applied Optics 57 ( 21 ) 6153 - 6163 2018.7

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Fabrication of a Novel Tellurite Hollow Core Optical Fiber and Supercontinuum Light Propagation in Its Hollow Core. Reviewed

Tong Hoang Tuan, Nobuhiko Nishiharaguchi*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of Optics 2018 OPTICS18 - PP 2018.7

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Multi-wavelength Eribium-doped Fiber Laser with Tunable Wavelength Spacing. Reviewed

シンルオ, Tong Hoang Tuan, タンシンサイニ, Hoa Phuoc Trung Nguyen*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of Optics 2018 OPTICS18 - PP 2018.7

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Highly coherent mid-infrared supercontinuum generation by chalcogenide optical fiber. Reviewed

Yasutake Ohishi, Kenshiro Nagasaka*, Tong Hoang Tuan, Takenobu Suzuki, Morio Matsumoto **, Shigeki Cho **

Proceedings of PNCS-ESG 2018 186028 2018.7

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All-solid tellurite photonic bandgap fiber fabrication for dynamic photonic bandgap control. Reviewed

Yasutake Ohishi, Tonglei Cheng*, Tong Hoang Tuan, Shunta Tanaka*, Takenobu Suzuki

Proceedings of PNCS-ESG 2018 186029 2018.7

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Tailoring optical bandgap properties of a Nd-doped tellurite all solid bandgap optical fiber to suppress the 1.06-µm emission of Nd³⁺ ions. Reviewed

Tong Hoang Tuan, Daisuke Demichi*, Takenobu Suzuki, Yasutake Ohishi

Symposium Program of ISNOG2018 114 2018.6

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Near-infrared optical image transport through an all-solid tellurite optical glassw rod with transversely-disordered refractive index profile. Reviewed

Tong Hoang Tuan, Shunei Kuroyanagi*, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

Optics Express 26 ( 13 ) 16054 - 16062 2018.6

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New prospect of highly nonlinear optical fibers. Reviewed

Yasutake Ohishi, Takenobu Suzuki

Symposium Program of ISNOG2018 82 2018.6

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Experimental Investigation of All-optical Dynamic Photonic Bandgap Control in an All-solid Tellurite Photonic Bandgap Fiber. Reviewed

Tonglei Cheng*, Shunta Tanaka*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of CLEO2018 JTu2A.117 2018.5

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Near-infrared to Mid-infrared wavelength conversion by chalcogenide suspended-core fiber. Reviewed

Kenshiro Nagasaka*, Tong Hoang Tuan, Hoa Phuoc Trung Nguyen*, Morio Matsumoto **, Shigeki Cho **, Takenobu Suzuki, Yasutake Ohishi

Proceedings of CLEO2018 JTu2A.126 2018.5

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Highly Coherent Mid-infrared Supercontinuum Spanning From 1.8-10 μm Pumped By A 2-μm Laser. Reviewed

Hoa Phuoc Trung Nguyen*, Kenshiro Nagasaka*, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

Proceedings of CLEO2018 JTu2A.127 2018.5

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Coherent Mid-infrared Supercontinuum Generation using Rib Wavelength Pumped with Femtosecond Laser. Reviewed

タンシンサイニ, Nguyen Phuoc Trung Hoa*, Kenshiro Nagasaka*, シンルオ, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

Proceedings of CLEO2018 JTu2A.143 2018.5

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Localization of light and transport of infrared optical image in a tellurite optical fiber with transversely-disordered regractive index profile. Reviewed

Tong Hoang Tuan, Shunei Kuroyanagi*, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of CLEO2018 JTu2A.131 2018.5

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Mid-infrared cascated stimulated Raman Scattering up to eight orders in As-S optical fiber. Reviewed

Tonglei Cheng **, Shuguang Li **, Xin Yan **, Tong Hoang Tuan, Morio Matsumoto **, Shigeki Cho **, Takenobu Suzuki, Yasutake Ohishi

Optics Express 26 ( 9 ) 12007 - 12015 2018.4

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Mid-infrared cascaded stimulated Raman scattering up to eight orders in As-S optical fiber Reviewed

Tonglei Cheng, Shuguang Li, Xin Yan, Tong Hoang Tuan, Morio Matsumoto, Shigeki Cho, Takenobu Suzuki, Yasutake Ohishi

Optics Express 26 ( 9 ) 12007 - 12015 2018.4 （ ISSN:1094-4087 eISSN:1094-4087 ）

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Mid-infrared cascaded stimulated Raman scattering (SRS) is experimentally investigated in an As-S optical fiber which is fabricated based on As38S62 and As36S64 glasses and whose fiber loss is ∼0.08 dB/m at1545 nm. Using a nanosecond laser operated at ∼1545 nm as the pump source, mid-infrared cascaded SRS up to eight orders is obtained in a 16 m As-S fiber. To the best of our knowledge, this is the first demonstration of SRS of such high order in non-silica optical fibers, and it may contribute to developing tunable mid-infrared Raman fiber lasers using C-band pump sources.

DOI： 10.1364/OE.26.012007
Cascaded Cross-Phase Modulation Instability in the Normal Dispersion Regime of a Birefringent Tellurite Microstructured Optical Fiber. Reviewed

Tonglei Cheng **, Shuguang Li +*, Takenobu Suzuki, Yasutake Ohishi

IEEE Photonics Journal 10 ( 2 ) 7101508 2018.4

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Coherent midinfrared supercontinuum generation using a rib waveguide pumped with 200 fs laser pulses at 2.8 μm Reviewed

Than Singh Saini, Nguyen Phuoc Trung Hoa, Kenshiro Nagasaka, Xing Luo, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

Applied Optics 57 ( 7 ) 1689 - 1693 2018.3 （ ISSN:2155-3165 eISSN:2155-3165 ）

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A rib waveguide structure in As2Se3 chalcogenide glass has been designed and numerically analyzed for on-chip coherent supercontinuum generation in the midinfrared region. The waveguide structure possesses an all-normal dispersion profile with dispersion value of −13.22 ps∕nm · km at the pump wavelength. Coherent midinfrared supercontinuum spectrum spanning 1.2 to 7.2 μm has been obtained using a 2.5 mm long rib waveguide when pumped with 200 fs laser pulses of a peak power of 2.5 kW and a repetition rate of 1 kHz at 2.8 μm. Such highly nonlinear subwavelength size rib waveguide structures are highly applicable for the power efficient on-chip midinfrared coherent supercontinuum sources. Coherent midinfrared supercontinuum sources are very important in frequency metrology, nonlinear microscopy, nondestructive testing, molecular spectroscopy, and optical coherence tomography.

DOI： 10.1364/AO.57.001689
太陽光励起ファイバレーザ用Cr³⁺, Nd³⁺共添加 Li₂O-Ga₂O₃-Al₂O₃-SiO₂ 系結晶化ガラスの発光特性 Reviewed

梅村侑史*, 熊澤正樹*, 鈴木　健伸, 大石　泰丈

日本セラミックス協会2018年年会講演予稿集 2018.3

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Coherent midinfrared supercontinuum generation using a rib waveguide pumped with 200 fs laser pulses at 2.8µm. Reviewed

タンシンサイニ, Nguyen Phuoc Trung Hoa*, Kenshiro Nagasaka*, シンルオ, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

Applied Optics 57 ( 7 ) 1689 - 1693 2018.3

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低フォノンエネルギーCaO-Al₂O₃-Ga₂O₃ガラスの作製 Reviewed

野田海斗*, 鈴木　健伸, 大石　泰丈

第65回応用物理学会春季学術講演会　講演予稿集 2018.3

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Experimental investigation cascaded stimulated Raman in chalcogenide optical fiber. Reviewed

トンレイ　チャン, Shuguang Li **, Xin Yan **, Tong Hoang Tuan, Morio Matsumoto **, Shigeki Cho **, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE Photonics West 2018 10528 105281J - 1 2018.2

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Far-detuned four-wave mixing for mid-infrared wavelength conversion in chalcogenide As₂S₅ suspended core fiber. Reviewed

Kenshiro Nagasaka*, Tong Hoang Tuan, Hoa Phuoc Trung Nguyen*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE Photonics West 2018 10528 105281M - 1 2018.2

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Mid-infrared frequency conversion via normal dispersion modulation instability in chalcogenide fibers. Reviewed

ライ　リュウ, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE Photonics West 2018 10528 105281S - 1 2018.2

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Tailoring Nd³⁺ emission spectrum by a neodymium-doped tellurite all-solid photonic bandgap fiber. Reviewed

Tong Hoang Tuan, Daisuke Demichi*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE Photonics West 2018 10528 105281P - 1 2018.2

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All-solid tellurite optical fiber with transversely disordered refractive index profile and its optical image transport performance. Reviewed

Tong Hoang Tuan, Shunei Kuroyanagi*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE Photonics West 2018 10528 105281O - 1 2018.2

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Numerical study on supercontinuum generation by different optical modes in AsSe2-As2S5 chalcogenide Microstructured Fiber. Reviewed

Li Chen **, Weiqing Gao **, Liang Chen **, Peng Wang **, Chenquan Ni **, Xiangcai Chen **, Yong Zhou **, Takenobu Suzuki, Yasutake Ohishi, 他3名*

Applied Optics 57 ( 3 ) 382 - 390 2018.1

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Suppressing 1.06-μm spontaneous emission of neodymium ions using a novel tellurite all-solid photonic bandgap fiber. Reviewed

Tong Hoang Tuan, Daisuke Demichi*, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

Optics Communications 415 87 - 92 2018.1

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Experimental investigation of all-optical dynamic photonic bandgap control in an all-solid tellurite photonic bandgap fiber Reviewed

Tonglei Cheng, Shunta Tanaka, Takenobu Suzuki, Yasutake Ohishi

Optics InfoBase Conference Papers 2018 JTu2A.117 2018 （ ISBN:9781557528209 ）

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Language：English Publishing type：Research paper (international conference proceedings) Publisher：OSA - The Optical Society

All-optical dynamic photonic bandgap control by optical Kerr effect is investigated in an all-solid double-clad tellurite photonic bandgap fiber. This is the first demonstration of alloptical dynamic PBG control in optical fibers.

DOI： 10.1364/CLEO_AT.2018.JTu2A.117
Coherent mid-infrared supercontinuum generation using rib waveguide pumped with femtosecond laser Reviewed

Than Singh Saini, Nguyen Phuoc Trung Hoa, Kenshiro Nagasaka, Xing Luo, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

Optics InfoBase Conference Papers 2018 2018 （ ISBN:9781557528209 ）

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Coherent mid-infrared supercontinuum spectrum spanning 1.2 to 7.2 μm has been reported using an As2Se3-chalcogenide rib waveguide pumped with 200 fs laser pulses of a moderately low peak power of 2.5 kW at 2.8 μm.

DOI： 10.1364/CLEO_AT.2018.JTu2A.143
Relationship between near-infrared emission of Bi-doped glass and preparation conditions Reviewed

Hirokazu Masai, Takenobu Suzuki, Yasutake Ohishi

Sensors and Materials 30 ( 7 ) 1533 - 1538 2018 （ ISSN:0914-4935 ）

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We have examined the effects of Bi concentration, annealing in air, and addition of reducing agent on the near-infrared (NIR) emission of Bi-doped TiO2-ZnO-B2O3-Al2O3 (TZBA) glass. Since the decay constants of the NIR emission are independent of the Bi concentration and the preparation conditions, it is expected that a small part of Bi species can act as effective activators in the glass. Annealing affects the blue shift and broadening of the NIR emission. The change in the bandwidth upon Bi or AlN addition can be explained from the viewpoint of the viscosity of the glass melt, which seems to be one of the important factors for obtaining broadband-emitting materials.

DOI： 10.18494/SAM.2018.1924
Multi-wavelength Erbium-doped Fiber Laser with Tunable Wavelength Spacing Reviewed

Xing Luo, Tong Hoang Tuan, Than Singh Saini, Hoa Phuoc Trung Nguyen, Takenobu Suzuki, Yasutake Ohishi

Proceedings of the 15th International Joint Conference on e-Business and Telecommunications 2018

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DOI： 10.5220/0006886302410245
Tailoring Nd3+ emission spectrum by a neodymium-doped tellurite all-solid photonic bandgap fiber Reviewed

Hoang Tuan Tong, Daisuke Demichi, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE - The International Society for Optical Engineering 10528 2018 （ ISBN:9781510615410 ISSN:1996-756X eISSN:1996-756X ）

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Language：English Publishing type：Research paper (international conference proceedings) Publisher：SPIE

A tellurite all-solid photonic bandgap fiber (ASPBF) whose cladding consists of 60 high-index rods arranged periodically around a central core was successfully fabricated. The diameter of high-index rod was about 5.0 μm and the distance between the center of two adjacent high-index rods was approximately 8.0 μm. The high-index rod was made of the TeO2-Li2O-WO3-MoO3-Nb2O5 (TLWMN) glass, the cladding was made of the TeO2-ZnO-Na2O-La2O3 (TZNL) glass as the background glass material and the central core was made of TZNL glass doped with 0.5 wt% of Nd2O3. A supercontinuum light from 0.6 to 2.4 μm was coupled into the core of fiber which is 2.2 cm long to measure its transmission spectrum. High transmission bands were obtained in the vicinity of 0.75 and 1.3 μm but the transmission was suppressed in the wavelength range from 1.0 to 1.06 μm. When a titanium Sapphire laser source at 0.75 μm was used, the emission spectrum was obtained with two peaks at 1.06 and 1.33 μm which are attributed to the 4F3/2→4I11/2 and 4F3/2→4I13/2 transitions of Nd3+ ion, respectively. The intensities of those emission peaks were compared with those obtained from a bulk glass having the same doping concentration of Nd3+. The results showed that by using tellurite ASPBF, the intensity of the 1.06-μm emission was suppressed by one-twelfth but the intensity of the 1.33-μm emission was maintained. This feature is very advantageous to filter out the 1.06-μm emission of Nd3+ ion in order to realize practical amplifier devices at 1.3 μm.

DOI： 10.1117/12.2289280
Intense blue upconversion emission in Tm³⁺, Yb³⁺ co-doped NaYSiO₄ phosphors. Reviewed

Xiaojie Xue*, Takenobu Suzuki, Yasutake Ohishi

Program and Abstracts of PRE'17 169 2017.12

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Energy transfer Cr³⁺→Er³⁺ in transparent oxyfluoride glass-ceramics. Reviewed

Takenobu Suzuki, Satoshi Takemoto*, Yasutake Ohishi

Program and Abstracts of PRE'17 158 2017.12

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Tailoring 1.33-µm spontaneous emission of Neodymium-ion by a novel tellurite all-solid photonic bandgap fiber. Reviewed

Tong Hoang Tuan, Daisuke Demichi*, Takenobu Suzuki, Yasutake Ohishi

Program and Abstracts of PRE'17 161 2017.12

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Fabrication and supercontinuum generation in a tellurite hybrid microstructured optical fiber with near-zero and flattened chromatic dispersion control Reviewed

Tong Hoang Tuan, Z. Duan **, D. Deng **, Takenobu Suzuki, Yasutake Ohishi

Journal of the Ceramic Society of Japan 125 ( 12 ) 876 - 880 2017.12

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ランダム断面構造光ファイバの作製と赤外イメージ伝送 Reviewed

畔柳俊英*, Tong Hoang Tuan, 長坂憲士朗*, 鈴木　健伸, 大石　泰丈

第58回ガラスおよびフォトニクス材料討論会　予稿集 PA - 27 2017.11

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Theoretical investigation on mid-infrared cascaded Raman fiber laser based on tellurite fiber Reviewed

Chenquan Ni, Weiqing Gao, Xiangcai Chen, Li Chen, Yong Zhou, Wei Zhang, Jigang Hu, Meisong Liao, Takenobu Suzuki, Yasutake Ohishi

APPLIED OPTICS 56 ( 33 ) 9171 - 9178 2017.11 （ ISSN:1559-128X eISSN:2155-3165 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：OPTICAL SOC AMER

A numerical simulation of third-order cascaded Raman fiber laser based on tellurite fiber at the 2-5 mu m waveband is presented. The Raman fiber laser can be optimized with the most suitable tellurite fiber length of 0.5-1.0 m and the most reasonable reflectivity of the third-order Stokes output FBG32 of 10%-20%. We demonstrate numerically that the third-order Stokes wave can reach the maximum average power of 45.2 W and the maximum optical conversion efficiency of 45.2%, corresponding to the FBG32 reflectivity of 10% and the tellurite fiber length of 0.3 m with the attenuation of 0.85 dB/m, when pumped by 2 mu m light with the average power of 100 W. Our simulated results provide valuable theoretical guidance for the design and experiment of tellurite Raman fiber laser at a mid-infrared waveband. (C) 2017 Optical Society of America

DOI： 10.1364/AO.56.009171
カルコゲナイドファイバを用いた中赤外スーパーコンティニューム光発生 Reviewed

長坂憲士朗*, Tong Hoang Tuan, トンレイ　チャン, 鈴木　健伸, 大石　泰丈

レーザー学会第511回研究会「ファイバーレーザー技術」プログラム 4 2017.11

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低フォノンエネルギーアルカリ土類アルミノガレートガラスの作製 Reviewed

野田海斗*, 鈴木　健伸, 大石　泰丈

第58回ガラスおよびフォトニクス材料討論会　予稿集 PA - 26 2017.11

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Suppressing chromatic dispersion fluctuation for broadband optical parametric gain in highly nonlinear tellurite microstructured optical fibers. Reviewed

Tong Hoang Tuan, N. P. T. Hoa*, Takenobu Suzuki, Yasutake Ohishi

Optical Review 24 ( 6 ) 757 - 764 2017.10

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Stimulated Raman Scattering in Hybrid Chalcogenide Microstructured Optical Fibers. Reviewed

Weiqing Gao **, Chenquan Ni **, Xiangcai Chen **, Li Chen **, Zhengqiang Wen **, トンレイ　チャン, Takenobu Suzuki, Yasutake Ohishi

Proceedings of OSA Laser Congress 2017(ASSL, LAC) JTu2A.18 2017.10

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Infrared image transport through an all-solid tellurite optical glass rod with transversely-disordered refractive index profile. Reviewed

Tong Hoang Tuan, Shunei Kuroyanagi*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of OSA Laser Congress 2017(ASSL, LAC) JTh2A.1 2017.10

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Suppressing 1.06-mm spontaneous emission of Neodymium by using a tellurite all-solid photonic bandgap fiber. Reviewed

Tong Hoang Tuan, Daisuke Demichi*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of Frontiers in Optics 2017 JTu2A.33 2017.9

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Effects of Fluctuations of Pulse Duration and Peak Power on the Coherence Properties of Supercontinuum Spectra. Reviewed

ライ　リュウ, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of Frontiers in Optics 2017 JW4A.122 2017.9

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Optical Temperature Sensing in NaYSiO₄:Er³⁺/Yb³⁺ Upconversion Phosphors. Reviewed

Xiaojie Xue*, トンレイ　チャン, Takenobu Suzuki, Yasutake Ohishi

Proceedings of Frontiers in Optics 2017 JW4A.106 2017.9

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Fabrication and characterization of an All-solid Double-clad Tellurite Photonic Bandgap Fiber. Reviewed

トンレイ　チャン, Shunta Tanaka*, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

Proceedings of Frontiers in Optics 2017 JW4A.77 2017.9

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The Second-Order Raman Stokes Stronger Than the First-Order Raman Stokes Due to Inverse Raman Scattering in a Single Mode Tellurite Fiber Reviewed

Tonglei Cheng, Xiaojie Xue, Weiqing Gao, Takenobu Suzuki, Yasutake Ohishi

IEEE JOURNAL OF QUANTUM ELECTRONICS 53 ( 4 ) 6800504 2017.8 （ ISSN:0018-9197 eISSN:1558-1713 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

The evolution Raman effect in a single-mode tellurite fiber (SMTF) was investigated by pumping a nanosecond laser operated at similar to 1545 nm. With the increase of the average pump power, inverse Raman scattering (IRS) effect was first observed in a 2.5-m-long SMTF, which induced a steadily growing second-order Raman Stokes that finally exceeded the first-order Raman Stokes. When the length of the SMTF was reduced to 0.5 m, no IRS effect was obtained due to the lower Raman gain.

DOI： 10.1109/JQE.2017.2711249
Supercontinuum generation in chalcogenide double-clad fiber with near zero-flattened normaldispersion profile. Reviewed

Kenshiro Nagasaka*, ライ　リュウ, Tong Hoang Tuan, トンレイ　チャン, Morio Matsumoto **, Hiroshige Tezuka **, Takenobu Suzuki, Yasutake Ohishi

Journal of Optics 19 095502 2017.8

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Mid-infrared Supercontinuum Generation in Chalcogenide Optical Fibers. Reviewed

Yasutake Ohishi, トンレイ　チャン, Kenshiro Nagasaka*, Tong Hoang Tuan, Takenobu Suzuki, Morio Matsumoto **, Hiroshige Tezuka **

Proceedings of 2017 CLEO Pacific Rim Conference S2622 2017.8

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Fourth-order cascaded Raman shift in a birefringence ZBLAN fluoride fiber Reviewed

Tonglei Cheng, Weiqing Gao, Xiaojie Xue, Takenobu Suzuki, Yasutake Ohishi

OPTICAL FIBER TECHNOLOGY 36 245 - 248 2017.7 （ ISSN:1068-5200 eISSN:1095-9912 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE INC

We investigate fourth-order cascaded Raman shift in a birefringence ZrF4-BaF2-LaF3-AlF3-NaF (ZBLAN) fluoride fiber, which is the first demonstration of cascaded Raman shift in fluoride fibers. The pump source is a commercially available 1064 nm picosecond fiber laser. At the average pump power of similar to 7W, fourth-order cascaded Raman shift is observed if the pump pulse is polarized to the slow axis, and third-order cascaded Raman shift is obtained if the pump pulse is polarized to the fast axis. The Raman shift generation is simulated by the generalized nonlinear Schrodinger equation (GNLSE), and the results are in good agreement with the experiments. (C) 2017 Elsevier Inc. All rights reserved.

DOI： 10.1016/j.yofte.2017.04.005
Suppressing the Effect of Dispersion Fluctuation on Broadband Optical Parametric Amplification using Highly Nonlinear Tellurite Microstructured Optical Fibers. Reviewed

Tong Hoang Tuan, Harutaka Kawamura*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of the 14th International Joint Conference on e-Business and Telecommunications 5 54 - 58 2017.7

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Numerical investigation of highly coherent mid-infrared supercontinuum generation in chalcogenide double-clad fiber Reviewed

Kenshiro Nagasaka, Lai Liu, Tong Hoang Tuan, Tonglei Cheng, Morio Matsumoto, Hiroshige Tezuka, Takenobu Suzuki, Yasutake Ohishi

OPTICAL FIBER TECHNOLOGY 36 82 - 91 2017.7 （ ISSN:1068-5200 eISSN:1095-9912 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE INC

It is shown that chalcogenide double-clad fibers (Ch-DCFs) have large potential to realize the highly coherent mid-infrared (MIR) supercontinuum generation. We design the Ch-DCFs with flatter chromatic dispersion and smaller effective mode diameter than chalcogenide step index fibers in the MIR region. We numerically investigate MIR supercontinuum generation in designed Ch-DCFs. It is numerically demonstrated that highly coherent MIR supercontinuum extending from 3.3 to 10.4 lm in the Ch-DCFs can be generated by pumping with hyperbolic secant pulse at 6 lm, the peak power of 2 kW, and the full width at half maximum of 300 fs. (C) 2017 Elsevier Inc. All rights reserved.

DOI： 10.1016/j.yofte.2017.03.002
All-optical dynamic photonic bandgap control in an all-solid double-clad tellurite photonic bandgap fiber. Reviewed

トンレイ　チャン, Shunta Tanaka*, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

Optics Letters 42 ( 12 ) 2354 - 2357 2017.6

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Flat Supercontinuum Generation in a Silica Photonic Crystal Fiber by Triple Wavelength Pumping. Reviewed

Weiqing Gao **, Chenquan Ni **, Xiangcai Chen **, Li Chen **, Zhengqiang Wen **, Wei Zhang **, Xiaojie Xue*, トンレイ　チャン, Takenobu Suzuki, Yasutake Ohishi

Proceedings of CLEO/Europe-EQEC 2017 ca - p 2017.6

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Dynamic bandgap control in a double cladding tellurite photonic bandgap fiber Reviewed

Tong Hoang Tuan, Shunta Tanaka*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of CLEO/Europe-EQEC 2017 ce - p 2017.6

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Modeling of dispersion flattened chalcogenide double clad fibers for midinfrared light generation. Reviewed

Kenshiro Nagasaka*, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

Proceedings of CLEO/Europe-EQEC 2017 cf - p 2017.6

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Chromatic dispersion fluctuation and optical parametric amplification performance in a tellurite hybrid microstructured optical fiber with buffer layer. Reviewed

Tong Hoang Tuan, Nguyeb Phuoc Trung Hoa*, Harutaka Kawamura*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of CLEO2017 JTu5A.120 2017.5

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Experimental Investigation of Inverse Raman Scattering in a Single Mode Tellurite Fiber. Reviewed

トンレイ　チャン, Xiaojie Xue*, Tong Hoang Tuan, Weiqing Gao*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of CLEO2017 JW2A.43 2017.5

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Mid-infrared Supercontinuum Generation in Chalcogenide Double Clad Fiber. Reviewed

Kenshiro Nagasaka*, Tong Hoang Tuan, Morio Matsumoto **, Hiroshige Tezuka **, Takenobu Suzuki, Yasutake Ohishi

Proceedings of CLEO2017 JW2A.44 2017.5

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Supercontinuum generation in the normal dispersion regime using chalcogenide double-clad fiber Reviewed

Kenshiro Nagasaka, Tong Hoang Tuan, Tonglei Cheng, Morio Matsumoto, Hiroshige Tezuka, Takenobu Suzuki, Yasutake Ohishi

APPLIED PHYSICS EXPRESS 10 ( 3 ) 032103 - 1 2017.3 （ ISSN:1882-0778 eISSN:1882-0786 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：IOP PUBLISHING LTD

We experimentally demonstrate mid-infrared (MIR) supercontinuum (SC) generation in a 2.8-cm-long chalcogenide double-clad fiber (Ch-DCF). The Ch-DCF made of As2Se3, AsSe2, and As2S5 glasses has near-zero chromatic dispersion in the normal dispersion regime. We pump the Ch-DCF using a 200 fs pulse laser at 10 mu m, and obtain MIR SC extending from 2 to 14 mu m. Numerical results show that the Ch-DCF has the potential of generating a highly coherent MIR SC light source. (C) 2017 The Japan Society of Applied Physics

DOI： 10.7567/APEX.10.032103
Highly nonlinear chalcogenide hybrid microstructured optical fibers with buffer layer and their potential performance of supercontinuum generation. Reviewed

Tong Hoang Tuan, Nguyen Phuoc Trung Hoa*, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE Photonics West 2017 10100 101001N - 1 2017.2

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Mid-infrared supercontinuum generation up to 15.1µm in a chalcogenide step-index optical fiber. Reviewed

トンレイ　チャン, Kenshiro Nagasaka*, Tong Hoang Tuan, Morio Matsumoto Furukawa Denshi Co., Ltd.*, Hiroshige Tezuka Furukawa Denshi Co., Ltd.*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of Photonics West 2017 2017.2

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Stimulated Raman scattering in AsSe₂-As₂S₅ microstructured optical fiber Reviewed

Weiqing Gao*, Chenquan Ni **, Qiang Xu **, Xue Li **, Xiangcai Chen **, トンレイ　チャン, シュエ　シャオジエ, Takenobu Suzuki, Yasutake Ohishi, 他2名*

Proceedings of Photonics West 2017 10100 101001O - 1 2017.2

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Luminescent properties and phase transition in Er³⁺-Yb³⁺- co-doped NaYF₄/SiO₂ core-shell nanoparticles Reviewed

シュエ　シャオジエ, トンレイ　チャン, Weiqing Gao*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of Photonics West 2017 10100 101001Y - 1 2017.2

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Experimental Investifation of Mid-infrared Supercontinuum Generation in Chalcogenide Step-index Optical Fibers Reviewed

トンレイ　チャン, Dinghuan Deng*, Kenshiro Nagasaka*, Tong Hoang Tuan, Morio Matsumoto **, Hiroshige Tezuka **, Takenobu Suzuki, Yasutake Ohishi

Proceedings of Photonics West 2017 10088 100880B - 1 2017.2

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Experimental Observation of Stimulated Raman Scattering in a Fluoride Fiber Reviewed

トンレイ　チャン, Weiqing Gao*, シュエ　シャオジエ, Takenobu Suzuki, Yasutake Ohishi

Proceedings of Photonics West 2017 10100 101001Z - 1 2017.2

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Mid-infrared roque wave generation in chalcogenide fibers Reviewed

ライ　リュウ, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of Photonics West 2017 10100 10010020 - 1 2017.2

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Mid-infrared supercontinuum generation in chalcogenide multi-step index fibers with nrmal chromatic dispersion. Reviewed

Kenshiro Nagasaka*, Tong Hoang Tuan, ライ　リュウ, Morimoto Matsumoto **, Hiroshige Tezuka **, Takenobu Suzuki, Yasutake Ohishi

Proceedings of Photonics West 2017 10100 1010021 - 1 2017.2

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Mid-infrared rogue wave generation in chalcogenide fibers Reviewed

Lai Liu, Kenshiro Nagasaka, Takenobu Suzuki, Yasutake Ohishi

OPTICAL COMPONENTS AND MATERIALS XIV 10100 2017 （ ISSN:0277-786X ）

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Language：English Publishing type：Research paper (international conference proceedings) Publisher：SPIE-INT SOC OPTICAL ENGINEERING

The supercontinuum generation and rogue wave generation in a step-index chalcogenide fiber are numerically investigated by solving the generalized nonlinear Schrodinger equation. Two noise models have been used to model the noise of the pump laser pulses to investigate the consistency of the noise modeling in rogue wave generation. First noise model is 0.1% amplitude noise which has been used in the report of rogue wave generation. Second noise model is the widely used one-photon-per-mode-noise and phase diffusion-noise. The results show that these two commonly used noise models have a good consistency in the simulations of rogue wave generation. The results also show that if the pump laser pulses carry more noise, the chance of a rogue wave with a high peak power becomes higher. This is harmful to the SC generation by using picosecond lasers in the chalcogenide fibers.

DOI： 10.1117/12.2251950
Interactive Segmentation of Pancreases in Abdominal Computed Tomography Images and Its Evaluation Based on Segmentation Accuracy and Interaction Costs Reviewed

Hotaka Takizawa, Takenobu Suzuki, Hiroyuki Kudo, Toshiyuki Okada

BIOMED RESEARCH INTERNATIONAL 2017 （ ISSN:2314-6133 eISSN:2314-6141 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：HINDAWI LTD

The present paper proposed an interactive segmentation method of pancreases in abdominal computed tomography (CT) images based on the anatomical knowledge of medical doctors and the statistical information of pancreas shapes. This segmentation method consisted of two phases: training and testing. In the training phase, pancreas regions were manually extracted from sample CT images for training, and then a probabilistic atlas (PA) was constructed from the extracted regions. In the testing phase, a medical doctor selected seed voxels for a pancreas and background in a CT image for testing by use of our graphical user interface system. The homography transformation was used to fit the PA to the seeds. The graph cut technique whose data term was weighted by the transformed PA was applied to the test image. The seed selection, the atlas transformation, and the graph cut were executed iteratively. This doctor-in-the-loop segmentation method was applied to actual abdominal CT images of fifteen cases. The experimental results demonstrated that the proposed method was more accurate and effective than the conventional graph cut.

DOI： 10.1155/2017/5094592
Investigation on optical and acoustic fields of stimulated Brillouin scattering in As2S3 suspended-core microstructured optical fibers Reviewed

Qiang Xu, Weiqing Gao, Xue Li, Chenquan Ni, Xiangcai Chen, Li Chen, Wei Zhang, Jigang Hu, Yuan Li, Meisong Liao, Tonglei Cheng, Takenobu Suzuki, Yasutake Ohishi

OPTIK 133 51 - 59 2017 （ ISSN:0030-4026 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER GMBH, URBAN & FISCHER VERLAG

The optical and acoustic fields of stimulated Brillouin scattering (SBS) and the interaction between them are investigated in the As2S3 chalcogenide suspended-core microstructured optical fibers (MOFs) by the finite-element method (FEM). The optical and acoustic fundamental modes are analyzed at 1550 nm. The core diameters of the MOFs vary from 1.0 to 6.0 mu m. For each case, the holes of the MOFs are filled with different materials such as trichlormethane (CHCL3), alcohol and water. When the core diameter is 6.0, 4.5, 3.0, 2.0 and 1.0 mu m, the ratios of difference for optical fields are similar to 0.66%, 0.97%, 1.48%, 1.94% and 3.55%, respectively, while the ratios of difference for acoustic fields are similar to 0.13%, 0.24%, 0.34%, 0.74% and 29.13%, respectively. The overlap factors between optical and acoustic fields are calculated, which change with the core diameter and the filled material. The results will be helpful to strengthen or suppress the SBS effect in practical applications. (C) 2017 Elsevier GmbH. All rights reserved.

DOI： 10.1016/j.ijleo.2017.12.003
Luminescent properties and phase transition in Er3+-Yb3+ co-doped NaYF4/SiO2 core-shell nanoparticles Reviewed

Xiaojie Xue, Tonglei Cheng, Weiqing Gao, Takenobu Suzuki, Yasutake Ohishi

OPTICAL COMPONENTS AND MATERIALS XIV 10100 2017 （ ISSN:0277-786X eISSN:1996-756X ）

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We successfully synthesized Er3+-Yb3+ doped cubic phase NaYF4 nanocrystals by a facile solvethermal method. The average size of the as-prepared nanocrystals was about 12 nm based on the observation of scanning electron microscope and transmission electron microscope. NaYF4/SiO2 nanoparticles were prepared. The thickness of shell layer was about 7 nm. The as-prepared samples were annealed at different temperature. The cubic phase NaYF4 did not transit to hexagonal phase, but to amorphous phase as the annealing temperature increased to 700 degrees C. When temperature further increased to 1100 degrees C, the amorphous NaYF4 reacted with SiO2 shell and formed a new phase, NaYSiO4. Under the excitation by a 976 nm laser, the Er3+-Yb3+ doped NaYF4, NaYF4/SiO2, and NaYSiO4 nanoparticles showed intense visible upconversion emissions. Since the host materials changed from fluoride crystals to amorphous fluoride, then to silicate crystals, the spectral profiles were different. Fluorescent lifetimes obtained from decay curves were applied to analyze the multi-phonon relaxation processes in different hosts. The Er3+-doped upconversion phosphors will be useful for light converting in solar cell applications in the future.

DOI： 10.1117/12.2251737
Experimental Investigation of Mid-infrared Supercontinuum Generation in Chalcogenide Step-index Optical Fibers Reviewed

Tonglei Cheng, Dinghuan Deng, Kenshiro Nagasaka, Tong Hoang Tuan, Morio Matsumoto, Hiroshige Tezuka, Takenobu Suzuki, Yasutake Ohishi

NONLINEAR FREQUENCY GENERATION AND CONVERSION: MATERIALS AND DEVICES XVI 10088 2017 （ ISSN:0277-786X ）

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We experimentally investigate mid-infrared (MIR) supercontinuum (SC) generation in chalcogenide step-index optical fibers. The pump source is generated by the difference frequency generation with a pulse width of similar to 170 fs, a repetition rate of similar to 1000 Hz, and a wavelength range tunable from 2.5 to 11 mu m. The wide MIR SC will be applied in sensing, medical and biological imaging areas.

DOI： 10.1117/12.2255680
Mid-infrared supercontinuum generation in chalcogenide multi-step index fibers with normal chromatic dispersion Reviewed

K. Nagasaka, Tong Hoang Tuan, Lai Liu, Morio Matsumoto, Hiroshige Tezuka, Takenobu Suzuki, Yasutake Ohishi

OPTICAL COMPONENTS AND MATERIALS XIV 10100 2017 （ ISSN:0277-786X ）

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We experimentally demonstrate mid-infrared supercontinuum (SC) generation in chalcogenide multi-step index fibers (MSIF) pumped by a femtosecond laser. The fabricated chalcogenide MSIF is composed of a high refractive index core (C1) in the center, which is enclosed by a lower refractive index core layer (C2) and an outer cladding. This fiber structure is advantageous to tailor the chromatic dispersion with higher freedom and to keep the effective mode area small at long wavelengths. The high refractive index core, low refractive index core, and the outer cladding materials are As2Se3, AsSe2 and As2S5, respectively. When the diameter of C1 and C2 are 7.8 and 30 mu m, respectively, the zero-dispersion wavelength (ZDW) of the fiber is 12.5 mu m. The chromatic dispersion profile is near-zero and flattened within the range of +/- 20 ps/km/nm in the wavelength range from 4 to 17 mu m and a broad normal dispersion region is obtained in the wavelength range shorter than the ZDW. In practice, a 2.8 cm long fiber is pumped at 10 mu m by using a femtosecond laser whose pulse width is similar to 200 fs. The SC generation extending from 2 to 14 mu m is obtained. Most of its spectrum is in the normal dispersion region of the fiber. These results are promising for the highly coherent mid-infrared SC generation.

DOI： 10.1117/12.2251984
Stimulated Raman scattering in AsSe2-As2S5 microstructured optical Reviewed

Weiqing Gao, Chenquan Ni, Qiang Xu, Xue Li, Xiangcai Chen, Li Chen, Zhengqiang Wen, Tonglei Cheng, Xiaojie Xue, Takenobu Suzuki, Yasutake Ohishi

OPTICAL COMPONENTS AND MATERIALS XIV 10100 2017 （ ISSN:0277-786X ）

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We demonstrate the effects of stimulated Raman scattering (SRS) in the all-solid-core chalcogenide microstructured optical fibers (MOFs) with AsSe2 core and As2S5 cladding, which are fabricated by the rod-in-tube drawing technique. The core diameters of the MOFs are similar to 6.3 (Fiber I), 3.0 (Fiber II), 2.6 (Fiber III) and 2.2 (Fiber IV) mu m, respectively. The chromatic dispersion of the fundamental mode in Fibers I-IV is simulated by the full-vectorial mode solver technique. The first-order Stokes wave is investigated in the fibers with different core diameters pumped by the picosecond pulses at 1958 nm. In Fiber I, no obvious Raman peak is observed with the pump power increasing, because the effective nonlinearity is not high. In Fiber II, a Raman Stokes peak at similar to 2065 nm begins to emerge at the pump power of 110 mW. The conversion efficiency is as weak as -36.6 dB at 150 mW pumping. In Fiber III, the first-order Raman peak at similar to 2060 nm begins to emerge at 40 mW pumping. The conversion efficiency is -15.0 dB, which is 21.6 dB higher than that in Fiber II. In Fiber IV, the Stokes peak at 2070 nm begins to appear at 56 mW pumping. The maximum conversion efficiency of the first-order Stokes wave is obtained in the MOF with the core diameter of 2.6 mu m. The evolution of the first-order Stokes wave with pump power and fiber length is investigated. This is the first demonstration of Raman effects in the AsSe2-As2S5 MOF, to the best of our knowledge.

DOI： 10.1117/12.2246516
Suppressing 1.06-μm spontaneous emission of neodymium by using a tellurite all-solid photonic bandgap fiber Reviewed

Tong Hoang Tuan, Demichi Daisuke, Takenobu Suzuki, Yasutake Ohishi

Optics InfoBase Conference Papers 2017 2017 （ ISBN:9781557528209 ）

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Language：English Publishing type：Research paper (international conference proceedings) Publisher：OSA - The Optical Society

We demonstrate a suppression of the 1.06-μm emission which corresponds to the 4F3/2→4I11/2 transition of Nd3+ ion doped in a tellurite all-solid photonic bandgap fiber by employing the light-guiding properties of its photonic bandgap structure.

DOI： 10.1364/FIO.2017.JTu2A.33
Supercontinuum generation in a step-index chalcogenide fiber with AsSe2 core and As2S5 cladding Reviewed

Weiqing Gao, Qiang Xu, Xue Li, Wei Zhang, Jigang Hu, Yuan Li, Xiangdong Chen, Zijun Yuan, Meisong Liao, Xia Li, Wanjun Bi, Tonglei Cheng, Takenobu Suzuki, Yasutake Ohishi

JAPANESE JOURNAL OF APPLIED PHYSICS 55 ( 12 ) 2016.12 （ ISSN:0021-4922 eISSN:1347-4065 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：IOP PUBLISHING LTD

We demonstrate the supercontinuum (SC) generation in a chalcogenide step-index fiber with AsSe2 core and As2S5 cladding. The characteristics of fiber are analyzed using the full-vectorial mode solver technique. The fiber has two zero-dispersion wavelengths at 2898 and 5140 nm. The evolving of SC spectra with fiber length and pump wavelength is investigated experimentally. The maximum SC range covering one octave from 1550 to 3300 nm is obtained when the 20 cm long fiber is pumped by 2000 nm pulses in normal dispersion region. The fiber can push forward the nonlinear application based on the stimulated Raman effect, stimulated Brillouin effect, four-wave mixing, supercontinuum generation, and so on in the mid-infrared waveband. The SCs are simulated by the nonlinear Schrodinger equation. The simulated results agree well with the experiments. (C) 2016 The Japan Society of Applied Physics

DOI： 10.7567/JJAP.55.122201
Experimental investigation on supercontinuum generation by single, dual, and triple wavelength pumping in a silica photonic crystal fiber Reviewed

Weiqing Gao **, Qiang Xu **, Xue Li **, Wei Zhang **, Meisong Liao **, トンレイ　チャン, シュエ　シャオジエ, Takenobu Suzuki, Yasutake Ohishi, 他4名*

Applied Optics 55 ( 33 ) 9514 - 9520 2016.11

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Laser Power density dependent energy transfer between Tm³⁺ and Tb³⁺: tunable upconversion emissions in NaYF₄: Tm³⁺, Tb³⁺, Yb³⁺, microsrystals. Reviewed

シュエ　シャオジエ, Makhin Thitsa **, トンレイ　チャン, Weiqing Gao **, Dinghuan Deng*, Takenobu Suzuki, Yasutake Ohishi

Optics Express 24 ( 23 ) 26307 - 26321 2016.11

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Experimental investigation of multiple Raman peak properties in a hundred-meter tellurite fiber Reviewed

トンレイ　チャン, Weiqing Gao **, シュエ　シャオジエ, Takenobu Suzuki, Yasutake Ohishi

Optical Materials Express 6 ( 11 ) 3438 - 3445 2016.11

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低フォノンエネルギーアルカリ土類アルミノガレートガラスの作製 Reviewed

野田海斗*, 鈴木　健伸, 大石　泰丈

第58回ガラスおよびフォトニクス材料討論会　予稿集 PA - 26 2016.11

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Wavelength Conversion Performance in a Tellurite Step-Index Optical Fiber Reviewed

Tong Hoang Tuan, レイ　チャン, Takenobu Suzuki, Yasutake Ohishi

Proceedings of Laser Applications Conference 2016 JTh2A.22 2016.11

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Fabrication of an all-solid tellurite disordered optical rod for transverse localization of light Reviewed

Tong Hoang Tuan, トンレイ　チャン, Shunei Kuroyanagi*, Shunta Tanaka*, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of Laser Applications Conference 2016 JTh2A.21 2016.11

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Second-order Raman Shift with Multiple Peaks in a Hundred-meter Tellurite Fiber Reviewed

トンレイ　チャン, Weiqing Gao*, シュエ　シャオジエ, Takenobu Suzuki, Yasutake Ohishi

Proceedings of Laser Applications Conference 2016 JTh2A.5 2016.11

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Supercontinuum and Parametric Amplification using Soft Glass Highly Nonlinear Optical Fibers Reviewed

Yasutake Ohishi, Takenobu Suzuki

Proceedings of CerSJ-GOMD Joint SYmposium on Glass Science and Technologies co-located with The 57th Meeting on Glass and Photonic Materials & The 12th Symposium of Glass Industry Conferences of Japan 116 2016.11

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Laser power density dependent energy transfer between Tm3+ and Tb3+: tunable upconversion emissions in NaYF4:Tm3+,Tb3+,Yb3+ microcrystals Reviewed

Xiaojie Xue, Makhin Thitsa, Tonglei Cheng, Weiqing Gao, Dinghuan Deng, Takenobu Suzuki, Yasutake Ohishi

OPTICS EXPRESS 24 ( 23 ) 26307 - 26321 2016.11 （ ISSN:1094-4087 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：OPTICAL SOC AMER

Energy transfer between Tm3+ and Tb3(+) dependent on the power density of pump laser was investigated in NaYF4: Tb3+, Tm3+, Yb3+ microcrystals. Under the excitation of a 976-nm near-infrared laser at various power densities, Tb3+-Tm3+-Yb3+ doped samples exhibited intense visible emissions with tunable color between green and blue. The ratio of blue and green emission were determined by energy transfer between Tm3+ and Tb3+. When the power density of pump laser was low, the energy transfer process from Tm3+ (F-3(4)) to Tb3+ (F-7(0)) occurred efficiently. Upconversion processes in Tm3+ were inhibited, only visible emissions from Tb3+ with green color were observed. When the power density increased, energy transfer from the F-3(4) (Tm3+) to F-7(0) level (Tb3+) was restrained and population on high energy levels of Tm3+ was increased. Contribution of upconversion emissions from Tm3+ gradually became dominant. The emission color was tuned from green to blue with increasing the power density. Energy transfer processes between low-lying levels of activators, such as Tm3+ will greatly reduce the population on certain levels for further high-order upconversion processes. The Tb3+-Tm3+-Yb3+ doped phosphors are promising materials for detecting the condition of power density of the invisible near-infrared laser. (C) 2016 Optical Society of America

DOI： 10.1364/OE.24.026307
Chromatic dispersion engineering in chalcogenide multi-step index fiber for mid-infrared supercontinuum generation Reviewed

Kenshiro Nagasaka*, Tong Hoang Tuan, ライ　リュウ, Takenobu Suzuki, Yasutake Ohishi

Proceedings of Frontiers in Optics/ Laser Science 2016 JTh2A.39 2016.10

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Experimental and Numerical Study on Stimulated Raman Scattering in AsSe₂-As₂S₅ Microstructured Optical Fiber Reviewed

Weiqing Gao **, Xue Li **, Qiang Xu **, Xiangcai Chen **, Chenquan Ni **, トンレイ　チャン, シュエ　シャオジエ, Takenobu Suzuki, Yasutake Ohishi, 他2名*

Proceedings of Frontiers in Optics/ Laser Science 2016 JW4A.188 2016.10

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Supercontinuum Generation in an AsSe₂-As₂S₅ Step-Index Fiber Reviewed

Weiqing Gao **, Qiang Xu **, Xue Li **, Li Chen **, Xiancai Chen **, トンレイ　チャン, シュエ　シャオジエ, Yasutake Ohishi, Takenobu Suzuki, 他2名*

Proceedings of Frontiers in Optics/ Laser Science 2016 JWA.199 2016.10

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Mid-infrared Dispersive Waves Generation in an All-solid AsSe₂-As₂S₅ Microstructured Optical Fiber Reviewed

トンレイ　チャン, Tong Hoang Tuan, ライ　リュウ, シュエ　シャオジエ, Morio Matsumoto **, Hiroshige Tezuka **, Takenobu Suzuki, Yasutake Ohishi

Proceedings of Frontiers in Optics/ Laser Science 2016 JTh2A.38 2016.10

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Fabrication and characterization of a tellurite all-solid photonic bandgap fiber with three rings of high index rods Reviewed

Tong Hoang Tuan, Kenichi Hashimoto*, Shunta Tanaka*, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of Frontiers in Optics/ Laser Science 2016 JTh2A.42 2016.10

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Luminescent Properties of Nd³⁺/Cr³⁺-doped LiCaAIF₆ Flower-like Microcrystals Reviewed

シュエ　シャオジエ, トンレイ　チャン, Takenobu Suzuki, Yasutake Ohishi

Proceedings of Frontiers in Optics/ Laser Science 2016 JTh2A.100 2016.10

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Amplified spontaneous emission in self-written waveguide containing KY₃F₁₀:Er³⁺/Yb³⁺ nanocrystals Reviewed

シュエ　シャオジエ, Takenobu Suzuki, Yasutake Ohishi

Proceedings of AAP2016 33 2016.9

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Experimental Observation of Mid-infrared Supercontinuum Generation in an As₂Se₃-AsSe₃ Fiber Reviewed

トンレイ　チャン, Kenshiro Nagasaka*, Tong Hoang Tuan, シュエ　シャオジエ, Morio Matsumoto **, Hiroshige Tezuka **, Takenobu Suzuki, Yasutake Ohishi

Proceedings of ECOC2016 713 - 715 2016.9 （ ISBN:978-3-8007-4274-5 ）

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ファイバブラッググレーティングを用いたNd³⁺添加ZBLANガラスファイバの太陽光励起レーザー発振 Reviewed

鈴木　健伸, 津本尚紀*, 大石　泰丈, M. Bernier **, R. Valee **

第77回応用物理学会秋季学術講演会予稿集 14a - A25 2016.9

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Chalcogenide hybrid microstructured optical fibers with dispersive characteristic invariant to fiber structure fluctuation Reviewed

Tong Hoang Tuan, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of AAP2016 34 2016.9

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Wavelength conversion performance in a tellurite step-index optical fiber Reviewed

Tong Hoang Tuan, レイ　チャン, Takenobu Suzuki, Yasutake Ohishi

Optics Communications 381 282 - 285 2016.7

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Optical Parmetric Amplification Performance in AsSe₂-based Hybrid Microstructured Optical Fibers Reviewed

Tong Hoang Tuan, Kenshiro Nagasaka*, Morio Matsumoto **, Hiroshige Tezuka **, Takenobu Suzuki, Yasutake Ohishi

Proceedings of OPTICS 2016 59 - 63 2016.7

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Optical solitons and supercontinuum generation in a tellurite microstructured optical fiber Reviewed

トンレイ　チャン, Tong Hoang Tuan, シュエ　シャオジエ, Dinghuan Deng*, Takenobu Suzuki, Yasutake Ohishi

Optics Communications 369 159 - 163 2016.6

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Solar pumped lasing of Nd-doped ZBLAN double-clad fiber with silica fiber Bragg gratings Reviewed

Takenobu Suzuki, Naoki Tsumoto*, Yasutake Ohishi

Proceedings of CLEO2016 JTh2A.19 2016.6

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Quantum Yield Measurements of KY₃F₁₀ : Er³⁺/Yb³⁺ Nanocrystals Excited by a 976 nm Laser Reviewed

シュエ　シャオジエ, トンレイ　チャン, Takenobu Suzuki, Yasutake Ohishi

Proceedings of CLEO2016 JTh2A.79 2016.6

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Experimental Observation of Multiple Four-wave Mixing Induced by Optical Solitons in a Tellurite Microstructured Optical Fiber Reviewed

トンレイ　チャン, ライ　リュウ, シュエ　シャオジエ, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of CLEO2016 JTu5A.102 2016.6

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The suppression of chromatic dispersion fluctuation in chalcogenide hybrid microstructured optical fibers and their parametric amplification performance Reviewed

Tong Hoang Tuan, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of CLEO2016 JTu5A.115 2016.6

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Femtosecond Four-Wave Mixing from Near-Infrared to Mid-Infrared in a Tellurite Step-Index Fiber Reviewed

レイ　チャン, Tong Hoang Tuan, Harutaka Kawamura*, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of CLEO2016 978 - 1 2016.6

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Highly efficient picosecond degenerate four-wave mixing in a tellurite microstructured optical fiber Reviewed

Lei Zhang, Tong Hoang Tuan, Harutaka Kawamura, Kenshiro Nagasaka, Takenobu Suzuki, Yasutake Ohishi

APPLIED PHYSICS EXPRESS 9 ( 6 ) 2016.6 （ ISSN:1882-0778 eISSN:1882-0786 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：IOP PUBLISHING LTD

Wavelength-tunable picosecond degenerate four-wave mixing was demonstrated in a tellurite microstructured optical fiber (TMOF). The zero-dispersion wavelength of the TMOF was shifted to 1570nm by introducing a single ring of air holes in the cladding. The anti-Stokes signal sideband can be generated from 1490 to 1500 nm, and the Stokes idler sideband can emit from 1595 to 1645 nm. Because of the high nonlinearity of the TMOF and the large peak power of the picosecond pump, a maximal signal gain of 31.2 dB and an idler conversion efficiency of +35 dB were achieved. (C) 2016 The Japan Society of Applied Physics

DOI： 10.7567/APEX.9.062501
Experimental observation of mid-infrared higher-order soliton fission in a tapered tellurite microstructured optical fiber Reviewed

トンレイ　チャン, シュエ　シャオジエ, ライ　リュウ, Takenobu Suzuki, Yasutake Ohishi

Japanese Journal of Applied Physics 55 ( 6 ) 060302 - 1 2016.5

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Mid-infrared supercontinuum generation spanning 2.0 to 15.1 μm in a chalcogenide step-index fiber Reviewed

トンレイ　チャン, Kenshiro Nagasaka*, Tong Hoang Tuan, シュエ　シャオジエ, Morio Matsumoto **, Hiroshige Tezuka **, Takenobu Suzuki, Yasutake Ohishi

Optics Letters 41 ( 9 ) 2117 - 2120 2016.5

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Mid-infrared Supercontinuum Generation using Soft Glass Fibers. Reviewed

Yasutake Ohishi, トンレイ　チャン, D. Deng*, レイ　チャン, ライ　リュウ, Takenobu Suzuki

Proceedings of APLS2016 74 2016.5

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Recent status of lightwave generation and processing using soft glass specialty optical fibers Reviewed

Yasutake Ohishi, Takenobu Suzuki

Abstracts of Glass & Optical Materials Division Meeting 2016 23 2016.5

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Broadband optical parametric amplifier formed by two pairs of adjacent four-wave mixing sidebands in a tellurite microstructured optical fibre Reviewed

Lei Zhang, Tong-Hoang Tuan, Harutaka Kawamura, Kenshiro Nagasaka, Takenobu Suzuki, Yasutake Ohishi

JOURNAL OF OPTICS 18 ( 5 ) 2016.5 （ ISSN:2040-8978 eISSN:2040-8986 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：IOP PUBLISHING LTD

A broadband fibre-optical parametric amplifier (FOPA) operating at a novel wavelength region that is far from the pump wavelength has been demonstrated by exploiting two pairs of adjacent four-wave mixing (FWM) sidebands generated simultaneously in a tellurite microstructured optical fibre (TMOF). Owing to the large nonlinearity of the TMOF and the high pump peak power provided by a picosecond laser, a maximal average gain of 65.1 dB has been obtained. When the FOPA is operated in a saturated state, a flat-gain amplification from 1424 nm to 1459 nm can be achieved. This broadband and high-gain FOPA operating at new wavelength regions far from the pump offers the prospect of all-optical signal processing.

DOI： 10.1088/2040-8978/18/5/055502
Mid-infrared supercontinuum generation spanning 2.0 to 15.1 mu m in a chalcogenide step-index fiber Reviewed

Tonglei Cheng, Kenshiro Nagasaka, Tong Hoang Tuan, Xiaojie Xue, Morio Matsumoto, Hiroshige Tezuka, Takenobu Suzuki, Yasutake Ohishi

OPTICS LETTERS 41 ( 9 ) 2117 - 2120 2016.5 （ ISSN:0146-9592 eISSN:1539-4794 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：OPTICAL SOC AMER

We experimentally demonstrate mid-infrared (MIR) super-continuum (SC) generation spanning similar to 2.0 to 15.1 mu m in a 3 cm-long chalcogenide step-index fiber. The pump source is generated by the difference frequency generation with a pulse width of similar to 170 fs, a repetition rate of similar to 1000 Hz, and a wavelength range tunable from 2.4 to 11 mu m. To the best of our knowledge, this is the broadest MIR SC generation observed so far in optical fibers. It facilitates fiber-based applications in sensing, medical, and biological imaging areas. (C) 2016 Optical Society of America

DOI： 10.1364/OL.41.002117
Broadband Fiber Optical Parametric Amplifier Formed by Two Pairs of Four-Wave Mixing in a Tellurite Microstructured Optical Fiber. Reviewed

レイ　チャン, Tong Hoang Tuan, Harutaka Kawamura*, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest (online) Optical Fiber Communication Conference 2016 M3D.2 2016.3

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A silica optical fiber doped with yttrium aluminosilicate nanoparticles for supercontinuum generation Reviewed

Tonglei Cheng, Meisong Liao, Xiaojie Xue, Jiang Li, Weiqing Gao, Xia Li, Danping Chen, Shupei Zheng, Yubai Pan, Takenobu Suzuki, Yasutake Ohishi

OPTICAL MATERIALS 53 39 - 43 2016.3 （ ISSN:0925-3467 eISSN:1873-1252 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

We design and fabricate a silica optical fiber doped with yttrium aluminosilicate (YAS, Y2O3-Al2O3-SiO2) nanoparticles in the core. The optical fiber is drawn directly from a silica tube with YAG (Y3Al5O12) ceramics and silica powders (the molar ratio 1:18) in the core at the temperature of similar to 1950 degrees C. The YAS nanoparticles are formed during the optical fiber drawing process. Supercontinuum (SC) generation in the optical fiber is investigated at different pump wavelength. At the pump wavelength of similar to 1750 nm which is in the deep anomalous dispersion region, SC spectrum evolution is mainly due to multiple soli tons and dispersive waves (DWs), and three pairs of multiple optical solitons and DWs are observed. When the pump wavelength shifts to similar to 1500 nm which is close to the zero-dispersion wavelength (ZDW), flattened SC spectrum with +/- 7 dB uniformity is obtained at the wavelength region of similar to 990-1980 nm, and only one obvious soliton and DW are observed. At the pump wavelength of similar to 1100 nm, a narrow SC spectrum from similar to 1020 to 1180 nm is obtained in the normal dispersion region due to self phase modulation (SPM) effect. (C) 2016 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.optmat.2016.01.018
Stimulated Raman scattering in AsSe₂-As₂S₅ chalcogenide microstructured optical fiber with all-solid core. Reviewed

Weiqing Gao Hefei University of Technology*, トンレイ　チャン, シュエ　シャオジエ, ライ　リュウ, レイ　チャン, Meisong Liao Shanghai Institute of Technology*, Takenobu Suzuki, Yasutake Ohishi

Optics Express 24 ( 4 ) 3278 - 3293 2016.2

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Coherent mid-infrared supercontinuum generation in all-solid chalcogenide microstructured fibers with all-normal dispersion. Reviewed

ライ　リュウ, トンレイ　チャン, Kenshiro Nagasaka*, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

Proc. of SPIE Optical Compnents and Materials XIII 9744 974414 - 1 2016.2

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Supercontinuum generation in a suspended core birefringent tellurite microstructured optical fiber pumped in telecommunication band by a picosecond laser. Reviewed

レイ　チャン, Tong Hoang Tuan, Harutaka Kawamura*, Takenobu Suzuki, Yasutake Ohishi

Proc. of SPIE Optical Compnents and Materials XIII 9744 974415 - 1 2016.2

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KY₃F₁₀:Er³⁺/Yb³⁺ nanocrystals doped laser-induced self-written waveguide for optical amplification in the C-band. Reviewed

シュエ　シャオジエ, トンレイ　チャン, Takenobu Suzuki, Yasutake Ohishi

Proc. of SPIE Optical Compnents and Materials XIII 9744 97440R - 1 2016.2

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Highly nonlinear chalcogenide optical fibers with flattened chromatic dispersion invariant to the core fluctuation and their performances of parametric amplification. Reviewed

Tong Hoang Tuan, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

Proc. of SPIE Optical Compnents and Materials XIII 9744 97440Q - 1 2016.2

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Evolution of the mid-infrared higher-order soliton fission in a tapered tellurite microstructured optical fiber. Reviewed

トンレイ　チャン, シュエ　シャオジエ, ライ　リュウ, Weiqing Gao*, Takenobu Suzuki, Yasutake Ohishi

Proc. of SPIE Optical Compnents and Materials XIII 9744 97441B - 1 2016.2

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Stimulated Raman scattering in AsSe2-As2S5 chalcogenide microstructured optical fiber with all-solid core Reviewed

Weiqing Gao, Tonglei Cheng, Xiaojie Xue, Lai Liu, Lei Zhang, Meisong Liao, Takenobu Suzuki, Yasutake Ohishi

OPTICS EXPRESS 24 ( 4 ) 3278 - 3293 2016.2 （ ISSN:1094-4087 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：OPTICAL SOC AMER

The effects of stimulated Raman scattering (SRS) is demonstrated in chalcogenide microstructured optical fiber (MOF) with allsolid AsSe2 core and As2S5 cladding. The first-order Raman Stokes wave is investigated in the MOFs with different core diameters pumped by the picosecond pulses at 1958 nm. The maximum conversion efficiency of -15.0 dB from the pump to first-order Raman Stokes wave is obtained in the MOF with the core diameter of 2.6 mu m. The conversion efficiency decreases when the core diameter deviates from 2.6 mu m. When the fiber core is larger, the effective nonlinearity is decreased. When the fiber core is smaller, the mode field is difficult to be confined in the core. The walk-off length between the pump and Stokes wave is crucial to the process of SRS according to the analysis of the experimental data. The Raman effects are simulated numerically. The simulated results can agree well with the experiments. It is the first time to demonstrate the Raman effect in AsSe2-As2S5 MOF, to the best of our knowledge. (C) 2016 Optical Society of America

DOI： 10.1364/OE.24.003278
Coherent mid-infrared supercontinuum generation in all-solid chalcogenide microstructured fibers with all-normal dispersion. Reviewed

ライ　リュウ, トンレイ　チャン, Kenshiro Nagasaka*, Tong Hoang Tuan, Guanshi Qin Jilin University*, Takenobu Suzuki, Yasutake Ohishi

Optics Letters 41 ( 2 ) 392 - 395 2016.1

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Fabrication of all-solid AsSe₂–As₂S₅ microstructured optical fiber with two zero-dispersion wavelengths for generation of mid-infrared dispersive waves Reviewed

Tonglei Cheng, Tong Hoang Tuan, Lai Liu, Xiaojie Xue, Morio Matsumoto, Hiroshige Tezuka, Takenobu Suzuki, Yasutake Ohishi

Applied Physics Express 9 ( 2 ) 022502 - 022502 2016.1 （ ISSN:1882-0778 eISSN:1882-0786 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：IOP Publishing

Abstract

We design and fabricate an all-solid chalcogenide microstructured optical fiber (MOF) with four rods in the cladding, in order to generate mid-infrared (MIR) dispersive waves (DWs). The high-index background is made of AsSe₂ glass, and the four low-index rods are made of As₂S₅ glass. This MOF has two zero-dispersive wavelengths: ∼3,720 and 4,230 nm. The propagation loss is ∼1.9 dB/m at 2,000 nm, and the nonlinear coefficient is ∼4 × 10³ km⁻¹ W⁻¹ at 3,000 nm. Using a pulse of ∼80 MHz and ∼200 fs emitted from an optical parametric oscillator as the pump source, the resulting MIR DWs are investigated at different pump wavelengths.

DOI： 10.7567/apex.9.022502

Other Link： https://iopscience.iop.org/article/10.7567/APEX.9.022502/pdf
Mid-infrared supercontinuum covering 3-10 µm using a As₂Se₃ core and As₂S₅ cladding step-index chalcogenide fiber Reviewed

ディンハン　デン, ライ　リュウ, Tong Hoang Tuan, Yasuhiro Kanou*, Morio Matsumoto Furukawa Denshi Co., Ltd.*, Hiroshige Tezuka Furukawa Denshi Co., Ltd.*, Takenobu Suzuki, Yasutake Ohishi

Journal of the Ceramic Society of Japan 124 ( 1 ) 103 - 105 2016.1

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Coherence property of mid-infrared supercontinuum generation in tapered chalcogenide fibers with different structures Reviewed

Lai Liu, Kenshiro Nagasaka, Guanshi Qin, Takenobu Suzuki, Yasutake Ohishi

APPLIED PHYSICS LETTERS 108 ( 1 ) 011101 - 1 2016.1 （ ISSN:0003-6951 eISSN:1077-3118 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：AMER INST PHYSICS

We have numerically investigated the coherence property of mid-infrared supercontinuum generation in tapered step-index chalcogenide fibers with different structures. The pump source is a 4 mu m laser with pulse width of 500 fs and peak power of 1 kW. The length ratio is the ratio of transition region length near the laser input to the other transition region length near the output. We calculate the bandwidth and the spectrally averaged coherence of the supercontinuum spectra generated in fibers with different length ratios under the same pumping condition. Numerical results show that as the length ratio increases, the bandwidth decreases from 4.84 lm to 4.11 lm while the spectrally averaged coherence increases from 0.53 to 0.9 and then jitters near the maximum. The length ratio within 1-1.5 is preferable to keep a balance between bandwidth and coherence. (C) 2016 AIP Publishing LLC.

DOI： 10.1063/1.4939187
遷移金属添加透明結晶化ガラスの作製とその発光特性 Reviewed

熊澤正樹*, 鈴木　健伸, 大石　泰丈

The 26th Meeting on Glasses for Photonics講演予稿集 2 - 3 2016.1

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Fabrication of all-solid AsSe₂-As₂S₅ microstructured optical fiber with two zero-dispersion wavelengths for generation of mid-infrared dispersive waves. Reviewed

トンレイ　チャン, Tong Hoang Tuan, ライ　リュウ, シュエ　シャオジエ, Morio Matsumoto Furukawa Denshi Co., Ltd.*, Hiroshige Tezuka Furukawa Denshi Co., Ltd.*, Takenobu Suzuki, Yasutake Ohishi

Applied Physics Express 9 022502 - 1 2016.1

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Mid-infrared supercontinuum covering 3-10 mu m using a As2Se3 core and As2S5 cladding step-index chalcogenide fiber Reviewed

Dinghuan Deng, Lai Liu, Tong Hoang Tuan, Yasuhiro Kanou, Morio Matsumoto, Hiroshige Tezuka, Takenobu Suzuki, Yasutake Ohishi

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN 124 ( 1 ) 103 - 105 2016.1 （ ISSN:1882-0743 eISSN:1348-6535 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：CERAMIC SOC JAPAN-NIPPON SERAMIKKUSU KYOKAI

A high numerical aperture (NA) step-index fiber with As2Se3 core and As2S5 cladding was fabricated for deep mid-infrared (MIR) transmission over 10 mu m. MIR supercontinuum generation covering the wavelength from 3 to 10 mu m was successfully demonstrated in this fiber using a MIR pulsed laser source with mu J-level energy output around 7 mu m. A 4-cm-long fiber sample is sufficient to enable a spectral broadening spreading from 3 to 10 mu m in a 20 dB dynamic range. (C) 2016 The Ceramic Society of Japan. All rights reserved.

DOI： 10.2109/jcersj2.15203
KY3F10:Er3+/Yb3+ nanocrystals doped laser-induced self-written waveguide for optical amplification in the C-band Reviewed

Xiaojie Xue, Tonglei Cheng, Takenobu Suzuki, Yasutake Ohishi

OPTICAL COMPONENTS AND MATERIALS XIII 9744 2016 （ ISSN:0277-786X ）

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Language：English Publishing type：Research paper (international conference proceedings) Publisher：SPIE-INT SOC OPTICAL ENGINEERING

We successfully synthesized Er3+/Yb3+ co-doped KY3F10 nanocrystals by a facile hydrothermal method. The average size of the as-prepared nanocrystals was about 60 nm based on the observation of scanning electron microscope. Under the excitation of a 976 nm laser, the Er3+/Yb3+ doped KY3F10 nanocrystals showed intense near-infrared emission band centered at 1539 nm. The optimal concentrations of Er3+ were carefully selected according to the quantum yield measurement for a stronger emission in the C-band. The as-prepared nanocrystals were dispersed into a monomer, bisphenol A ethoxylate diacrylates, in which self-written waveguides can be fabricated under the irradiation of an induced laser at 450 nm. The KY3F10: Er3+/Yb3+ nanocrystals embedded polymer waveguide were fabricated by laser-induced self-written technique. Two pieces of single mode fiber were well connected with the waveguide in the fabrication procedure. Under a 976 nm laser pumping, amplified spontaneous emission at 1539 nm was observed in the KY3F10:Er3+/Yb3+ nanocrystals doped waveguide.

DOI： 10.1117/12.2212124
Experimental observation of mid-infrared supercontinuum generation in an As<inf>2</inf>Se<inf>3</inf>-AsSe<inf>2</inf> fiber Reviewed

Tonglei Cheng, Kenshiro Nagasaka, Tong Hoang Tuan, Xiaojie Xue, Morio Matsumoto, Hiroshige Tezuka, Takenobu Suzuki, Yasutake Ohishi

European Conference on Optical Communication, ECOC 713 - 715 2016 （ ISBN:9783800742745 ）

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We experimentally investigate supercontinuum generation spanning ∼2.0 to 15.1 μm in a 3 mm-long As2Se3-AsSe2 fiber with the mid-infrared femtosecond pulse pump source.
Optical Parametric Amplification Performance in AsSe2-based Hybrid Microstructured Optical Fibers Reviewed

Hoang Tuan Tong, Kenshiro Nagasaka, Morio Matsumoto, Hiroshige Tezuka, Takenobu Suzuki, Yasutake Ohishi

OPTICS: PROCEEDINGS OF THE 13TH INTERNATIONAL JOINT CONFERENCE ON E-BUSINESS AND TELECOMMUNICATIONS - VOL. 3 59 - 63 2016

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Language：English Publishing type：Research paper (international conference proceedings) Publisher：SCITEPRESS

The performance of fiber-optical parametric amplification is studied by employing the AsSe2-based hybrid microstructured optical fiber (HMOF). By adding a buffer layer around the core with appropriate diameter and refractive index difference, the chromatic dispersion profile of chalcogenide HMOFs can be tailored to have a near-zero and flattened anomalous dispersion regime in the mid-infrared window. A very broad gain bandwidth can be achieved from 3.0 to 9.0 mu m by pumping at 4.7 mu m. The signal gain can be as high as 32 dB. In addition, the HMOF with buffer layer can suppress the chromatic dispersion variation caused by the fiber structure fluctuation and maintain the signal gain spectrum.

DOI： 10.5220/0005992300590063
Quantum Yield Measurements of KY3F10: Er3+/Yb3+ Nanocrystals Excited by a 976 nm Laser Reviewed

Xiaojie Xue, Tonglei Cheng, Takenobu Suzuki, Yasutake Ohishi

2016 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) 2016 （ ISSN:2160-9020 ）

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Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

Optimized concentrations of Er3+/Yb3+ and energy transfer process in KY3F10 nanocrystals were investigated by quantum yield (QY) measurements. Low Yb3+ concentration will enhance QY while high concentration will dramatically reduce QY.
高効率Er³⁺添加フッ化物ナノ結晶の作製 Reviewed

馬渡崇志*, シュエ　シャオジエ, 鈴木　健伸, 大石　泰丈

平成27年度日本セラミックス協会東海支部学術研究発表会　講演要旨集 13 2015.12

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遷移金属添加γ-Ga₂O₃透明結晶化ガラスの作製とその発光特性 Reviewed

熊澤正樹*, 鈴木　健伸, 大石　泰丈

平成27年度日本セラミックス協会東海支部学術研究発表会　講演要旨集 11 2015.12

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Upconversion emissions from high energy levels of Tb3+ under near-infrared laser excitation at 976 nm Reviewed

Xiaojie Xue, Tonglei Cheng, Takenobu Suzuki, Yasutake Ohishi

OPTICAL MATERIALS EXPRESS 5 ( 12 ) 2768 - 2776 2015.12 （ ISSN:2159-3930 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：OPTICAL SOC AMER

Ultraviolet upconversion emissions from high energy levels (D-5(1), L-5(8), L-5(9), (5)G(5), and L-5(10)) of Tb3+ were observed in the NaYF4:Tb3+, Yb3+ microcrystals under excitation of a 976 nm laser diode at room temperature. These energy levels were populated by energy transfer and excited state absorption processes. Power dependence measurements confirmed it was caused by a three-photon upconversion process. Concentration quenching did not strongly affect the population of these levels. (C) 2015 Optical Society of America

DOI： 10.1364/OME.5.002768
Soft Glass Highly Nonlinear Optical Fibers and Their Applications. Reviewed

Yasutake Ohishi, レイ　チャン, トンレイ　チャン, Tong Hoang Tuan, ライ　リュウ, Takenobu Suzuki

Conference CD of Workshop on Specialty Optical Fibers and Their Applications © OSA 2015 WF1A.5 2015.11

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Upconversion emissions from high energy levels of Tb³⁺ under near-infrared laser excitation at 976nm Reviewed

シュエ　シャオジエ, トンレイ　チャン, Takenobu Suzuki, Yasutake Ohishi

Optical Materials Express 5 ( 12 ) 2768 - 2776 2015.11

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低軟化ガラス光ファイバによる光波の発生と制御 Reviewed

大石　泰丈, 鈴木　健伸

レーザー学会第482回研究会報告 1 - 6 2015.11

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Widely tunable dispersive wave generation and soliton self-frequency shift in a tellurite microstructured optical fiber pumped near the zero dispersion wavelength Reviewed

レイ　チャン, Tong Hoang Tuan, ライ　リュウ, W.Gao*, H.Kawamura*, Takenobu Suzuki, Yasutake Ohishi

Journal of Optics 17 ( 12 ) 1 - 7 2015.10

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Tellurite Microstructured Optical Fiber Based Raman Soliton and Dispersive Wave Generation. Reviewed

レイ　チャン, Tong Hoang Tuan, Weiqing Gao*, Harutaka Kawamura*, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest (online) JW2A.28 2015.10

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Supercontinuum Generation in Fluoride Fibers Pumped By a 2 μm Q-switched Laser. Reviewed

ライ　リュウ, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest (online) JW2A.44 2015.10

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Invariant chromatic dispersion properties of tellurite hybrid microstructured optical fibers with buffer layer. Reviewed

Tong Hoang Tuan, Kouki Takenaka*, Harutaka Kawamura*, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest (online) JTu4A.28 2015.10

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Experimental Observation of Multiple Dispersive Waves and Mid-infrared Solitons in a Birefringence Tellurite Microstructured Optical Fiber. Reviewed

トンレイ　チャン, Tong Hoang Tuan, シュエ　シャオジエ, ディンハン　デン, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest (online) JTu4A.29 2015.10

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Highly Efficient Dispersive Wave Emission in a Tellurite Microstructured Optical Fiber. Reviewed

トンレイ　チャン, シュエ　シャオジエ, ディンハン　デン, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest (online) JW2A.29 2015.10

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Ultraviolet Emissions of Tb³⁺ by Three-photon Upconversion Process. Reviewed

シュエ　シャオジエ, トンレイ　チャン, ディンハン　デン, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest (online) JTu4A.4 2015.10

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Optical parametric oscillator based on degenerate four-wave mixing in suspended core tellurite microstructured optical fiber. Reviewed

レイ　チャン, Tong Hoang Tuan, Harutaka Kawamura*, Takenobu Suzuki, Yasutake Ohishi

Optics Express 23 ( 20 ) 26299 - 26304 2015.9

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Flexible wavelength conversion based on four-wave mixing in tellurite microstructured optical fibre Reviewed

L. Zhang, T. H. Tuan, H. Kawamura, D. Sega, D. Deng, T. Suzuki, Y. Ohishi

Electronics Letters 51 ( 19 ) 1519 - 1521 2015.9 （ ISSN:0013-5194 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：Institution of Engineering and Technology

On the basis of the tuned four-wave mixing generated in a tellurite microstructured optical fibre, flexible and efficient wavelength conversion can be realised. The signal at 1494 nm can be converted to any wavelength in the band from 1598 to 1641.5 nm by tuning the pump wavelength. A 27.6 dB maximum idler conversion efficiency has been achieved.

DOI： 10.1049/el.2015.1130
Coexistence of Photonic Bandgap Guidance and Total Internal Reflection in Photonic Crystal Fiber Based on a High-Index Array With Internal Air Holes. Reviewed

Peng Lin*, Yanfeng Li*, トンレイ　チャン, Takenobu Suzuki, Yasutake Ohishi

IEEE Journal of Selected Topics in Quantum Electronics 22 ( 2 ) 4900606 2015.9

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近赤外広帯域波長可変レーザーの実現に向けたCr⁴⁺ : CaYGO₄の作製 Reviewed

中村聖奈*, 鈴木　健伸, 大石　泰丈

日本セラミックス協会第28回秋季シンポジウム講演予稿集 2PN03 2015.9

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Multi-peak-spectra Generation with Multiple Dispersive Waves and Solitons in a Birefringence Tellurtie Microstructured Optical Fiber. Reviewed

トンレイ　チャン, Tong Hoang Tuan, シュエ　シャオジエ, ディンハン　デン, Takenobu Suzuki, Yasutake Ohishi

Proceedings of 41st European Conference on Optical Communication (ECOC2015) 1 - 3 2015.9

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Tellurite Microstructured Fiber Based Optical Parametric Amplifier. Reviewed

レイ　チャン, Tong Hoang Tuan, ディンハン　デン, Harutaka Kawamura*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of 41st European Conference on Optical Communication (ECOC2015) 1 - 4 2015.9

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Experimental observation of multiple dispersive waves emitted by multiple mid-infrared solitons in a birefringence tellurite microstuctured optical fiber Reviewed

Tonglei Cheng, Tong Hoang Tuan, Xiaojei Xue, Lai Liu, Dinghuan Deng, Takenobu Suzuki, Yasutake Ohishi

OPTICS EXPRESS 23 ( 16 ) 20647 - 20654 2015.8 （ ISSN:1094-4087 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：OPTICAL SOC AMER

We experimentally demonstrate multiple dispersive waves (DWs) emitted by multiple mid-infrared solitons in a birefringence tellurite microstuctured optical fiber (BTMOF). To the best of our knowledge, this is the first demonstration of multiple DWs in the non-silica fibers. By using a pulse of similar to 80 MHz and similar to 200 fs emitted from an optical parametric oscillator (OPO) as the pump source, DWs and solitons are investigated on the fast and slow axes of the BTMOF at the pump wavelength of similar to 1800 nm. With the average pump power increasing from similar to 200 to 450 mW, the center wavelength of the 1st DW decreases from similar to 956 to 890 nm, the 2nd DW from similar to 1039 to 997 nm, the 3rd DW from similar to 1101 to 1080 nm, and the 4th DW from similar to 1160 to 1150 nm. Meanwhile, obvious multiple soliton self-frequency shifts (SSFSs) are observed in the mid-infrared region. Furthermore, DWs and solitons at the pump wavelength of similar to 1400 and 2000 nm are investigated at the average pump power of similar to 350 mW. (C) 2015 Optical Society of America

DOI： 10.1364/OE.23.020647
Experimental observation of multiple dispersive waves emitted by multiple mid-infrared solitons in a birefringence tellurite microstructured optical fiber. Reviewed

トンレイ　チャン, Tong Hoang Tuan, シュエ　シャオジエ, ライ　リュウ, ディンハン　デン, Takenobu Suzuki, Yasutake Ohishi

Optics Express 23 ( 16 ) 20647 - 20654 2015.7

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Tunable Soliton Generation in a Birefringent Tellurite Microstructured Optical Fiber. Reviewed

レイ　チャン, トンレイ　チャン, ディンハン　デン, Daisuke Sega*, ライ　リュウ, シュエ　シャオジエ, Takenobu Suzuki, Yasutake Ohishi

IEEE Photonics Technology Letters 27 ( 14 ) 1547 - 1549 2015.7

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Optical Pulse Shaping by Doublet Brillouin Gain Lines in a Single-mode Tellurite Fiber. Reviewed

ディンハン　デン, Kenshiro Nagasaka*, トンレイ　チャン, シュエ　シャオジエ, Takenobu Suzuki, Yasutake Ohishi

Proceedings of the 20th OptoElectronics and Communications Conference (OECC2015) PWe.10 2015.7

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Soliton Self-frequency Shift and Supercontinuum Generation in a Tellurite Microstructured Optical Fiber. Reviewed

トンレイ　チャン, Tong Hoang Tuan, シュエ　シャオジエ, ディンハン　デン, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest (online) NW4A.33 2015.7

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Flexible Four-Wave Mixing Based Wavelength Conversion in a Tellurite Microstructured Fiber. Reviewed

レイ　チャン, Tong Hoang Tuan, Daisuke Sega*, Harutaka Kawamura*, ディンハン　デン, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest (online) NW4A.32 2015.7

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Optical parametric amplification in dual-pumped tellurite hybrid microstructured optical fiber with engineered chromatic dispersion. Reviewed

Tong Hoang Tuan, Edmund Samuel*, トンレイ　チャン, Koji Asano*, Takenobu Suzuki, Yasutake Ohishi

Journal of Physics: Conference Series 619 1 - 4 2015.6

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Laser Power Density Dependent Emission in Tb³⁺, Tm³⁺, Yb³⁺ Co-doped NaYF₄ Upconversion Phosphors. Reviewed

シュエ　シャオジエ, トンレイ　チャン, ディンハン　デン, レイ　チャン, ライ　リュウ, Takenobu Suzuki, Yasutake Ohishi

Proceedings of CLEO/Europe-EQEC 2015 ce - 12 2015.6

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Optical pulse shaping by modulated Brillouin gain in a tellurite fiber. Reviewed

ディンハン　デン, Kenshiro Nagasaka*, トンレイ　チャン, シュエ　シャオジエ, Takenobu Suzuki, Yasutake Ohishi

Proceedings of CLEO/Europe-EQEC 2015 cj - 43 2015.6

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Experimental observation of tunable third-harmonic generation in a tellurite microstructured optical fiber. Reviewed

トンレイ　チャン, ディンハン　デン, シュエ　シャオジエ, Morio Matsumoto Furukawa Denshi Co., Ltd.*, Hiroshige Tezuka Furukawa Denshi Co., Ltd*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of CLEO/Europe-EQEC 2015 cj - 45 2015.6

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Fabrication and characterization of an all-solid tellurite-phosphate photonic bandgap fiber. Reviewed

トンレイ　チャン, Yukiko Sakai*, Takenobu Suzuki, Yasutake Ohishi

Optics Letters 40 ( 9 ) 2088 - 2090 2015.5

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Multiple Raman Soliton Generation in a Birefringence Tellurtie Microstructured Optical Fiber. Reviewed

レイ　チャン, トンレイ　チャン, ディンハン　デン, D. Sega*, ライ　リュウ, Takenobu Suzuki, Yasutake Ohishi

CLEO: 2015 OSA Technical Digest FW4D.3 2015.5

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Tb³⁺-doped nanocrystal for visible laser media. Reviewed

Yasutake Ohishi, シュエ　シャオジエ, Takenobu Suzuki

AOPC2015 Applied Optics and Photonics China Invited Talks 8 2015.5

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Widely tunable Raman laser in a tellurite fiber ring cavity. Reviewed

ディンハン　デン, ライ　リュウ, トンレイ　チャン, シュエ　シャオジエ, レイ　チャン, Makoto Yamada Osaka Prefecture University*, Takenobu Suzuki, Yasutake Ohishi

CLEO: 2015 OSA Technical Digest JW2A.98 2015.5

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Hybrid Chalcogenide Microstructured Optical Fiber for Mid-infrared Soliton Self-frequency Shift. Reviewed

トンレイ　チャン, Y. Kanou*, シュエ　シャオジエ, ディンハン　デン, レイ　チャン, ライ　リュウ, M. Matsumoto Furukawa Denshi Co., Ltd.*, H. Tezuka Furukawa Denshi Co., Ltd*, Takenobu Suzuki, Yasutake Ohishi

CLEO: 2015 OSA Technical Digest JTu5A.20 2015.5

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Theoretical investigation of tunable pulse broadening cancellation via doublet Brillouin gain lines in an optical fiber. Reviewed

Kenshiro Nagasaka*, Qijin Tian Jilin University*, ライ　リュウ, Dan Zhao Jilin University*, Guanshi Qin Jilin University*, Weiping Qin Jilin University*, Takenobu Suzuki, Yasutake Ohishi

Optics Communications 351 35 - 39 2015.4

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Highly Efficient Tunable Dispersive Wave in a Tellurite Microstructured Optical Fiber Reviewed

Tonglei Cheng, Dinghuan Deng, Xiaojie Xue, Lei Zhang, Takenobu Suzuki, Yasutake Ohishi

IEEE PHOTONICS JOURNAL 7 ( 1 ) 2015.2 （ ISSN:1943-0655 eISSN:1943-0647 ）

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We demonstrate a highly efficient, stable, and tunable dispersive wave (DW) emitted by the soliton in a tellurite microstructured optical fiber. The dependence of the generated DW properties on the average pump power is experimentally investigated. By using the 80-MHz pulse emitted from an optical parametric oscillator as the pump source, the DW from similar to 1626 to 1685 nm is obtained with the average pump power changing from similar to 250 to 440 mW at the pump wavelength of similar to 1760 nm. The conversion efficiency is over similar to 65%. The full width at half maximum (FWHM) of DW pulse at the center wavelength of similar to 1626 nm is similar to 90 fs, which was measured by an intensity autocorrelator. The stable DW pulse can be used as a near-infrared femtosecond source.

DOI： 10.1109/JPHOT.2014.2381662
Ultra-flat and broad gain bandwidth of optical parametric amplification in highly-nonlinear tellurite hybrid microstructured optical fibers. Reviewed

トンレイ　チャン, T.H. Tong*, シュエ　シャオジエ, ディンハン　デン, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 2015.2

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Broadband cascaded four-wave mixing and supercontinuum generation in a tellurite microstructured optical fiber pumped at 2 μm. Reviewed

トンレイ　チャン, レイ　チャン, シュエ　シャオジエ, ディンハン　デン, Takenobu Suzuki, Yasutake Ohishi

Optics Express 23 ( 4 ) 4125 - 4134 2015.2

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Widely tunable third-harmonic generation in a tellurite microstructured optical fiber Reviewed

Tonglei Cheng, Dinghuan Deng, Xiaojie Xue, Morio Matsumoto, Hiroshige Tezuka, Takenobu Suzuki, Yasutake Ohishi

APPLIED OPTICS 54 ( 6 ) 1326 - 1330 2015.2 （ ISSN:1559-128X eISSN:2155-3165 ）

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We designed and fabricated a tellurite (76.5TeO(2)-6Bi(2)O(3)-11.5Li(2)O-6ZnO, mol. %) microstructured optical fiber (TMOF) with four air holes for widely tunable third-harmonic generation (THG). The loss of the TMOF is similar to 0.2 dB/m at 1550 nm. Widely tunable THG from similar to 567 to 902 nm is obtained when the TMOF is pumped by an optical parametric oscillator with the pump wavelength changing from similar to 1700 to 2700 nm. The mechanism of THG in this work is further investigated through the third-harmonic signal pattern, which is due to the high nonlinearity of the TMOF and the high pump power, not from the phase-matching process between the fundamental mode and the high-order TH mode. (C) 2015 Optical Society of America

DOI： 10.1364/AO.54.001326
Widely tunable soliton self-frequency shift and dispersive wave generation in a highly nonlinear fiber. Reviewed

ディンハン　デン, トンレイ　チャン, シュエ　シャオジエ, Tong Hoang Tuan*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 9359 935903 - 1 2015.2

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Flattened supercontinuum generation in tellurite-phosphate and chalcogenide-tellurite hybrid microstructured optical fibers with tailored charomatic dispersion profiles. Reviewed

Tong Hoang Tuan*, Zhongchao Duan*, シュエ　シャオジエ, トンレイ　チャン, ディンハン　デン, Morio Matsumoto Furukawa Denshi Co., Ltd.*, Hiroshige Tezuka Furukawa Denshi Co., Ltd*, Takenobu Suzuki, Yasutake Ohishi, 他2名*

Proceedings of SPIE 9359 93591I - 1 2015.2

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Chalcogenide amorphous nanoparticles doped poly (methyl mechacrylate) with high nonlinearity for optical waveguide. Reviewed

シュエ　シャオジエ, Kenshiro Nagasaka*, トンレイ　チャン, ディンハン　デン, レイ　チャン, ライ　リュウ, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 9359 935921 - 1 2015.2

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Broad and Ultra-flat Optical Parametric Gain in Tellurite Hybrid Microstructured Optical Fibers. Reviewed

トンレイ　チャン, Tong Hoang Tuan*, Edmund Samuel*, ディンハン　デン, シュエ　シャオジエ, Takenobu Suzuki, Yasutake Ohishi

Proceedings of 2015 Photonics West 9359 93591Q - 1 2015.2

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Broadband cascaded four-wave mixing and supercontinuum generation in a tellurite microstructured optical fiber pumped at 2 mu m Reviewed

Tonglei Cheng, Lei Zhang, Xiaojie Xue, Dinghuan Deng, Takenobu Suzuki, Yasutake Ohishi

OPTICS EXPRESS 23 ( 4 ) 4125 - 4134 2015.2 （ ISSN:1094-4087 ）

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We demonstrate the broadband cascaded four-wave mixing (FWM) and supercontinuum (SC) generation in a tellurite MOF which is made from 76.5TeO(2)-6ZnO-11.5Li(2)O-6Bi(2)O(3) (TZLB, mol%) glass. By using a 2-mu m picosecond laser with the center wavelength of similar to 1958 nm as the pump source, the broadband FWM with the frequency separation of similar to 1.1 THz is obtained. The bandwidth of the frequency comb spans a range of similar to 630 nm from similar to 1620 to 2250 nm at the average pump power of similar to 125 mW. With the average pump power increasing to similar to 800 mW, the broadband mid-infrared SC generation with the spectrum from similar to 900 to 3900 nm is observed. Changing the pump source to a femtosecond laser (optical parametric oscillator, OPO) with the center wavelength of similar to 2000 nm, solitons and dispersive waves (DWs) are obtained. (C) 2015 Optical Society of America

DOI： 10.1364/OE.23.004125
Fabrication of a Chalogenide-Tellurite Hybrid Microstructured Optical Fiber for Flattened and Broadband Supercontinuum Generation. Reviewed

トンレイ　チャン, Hiroyasu Kawashima*, シュエ　シャオジエ, ディンハン　デン, Morio Matsumoto*, Takashi Misumi*, Takenobu Suzuki, Yasutake Ohishi

Journal of Lightwave Technology 33 ( 2 ) 333 - 338 2015.1

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Numerical Investigation of Coherent Mid-infrared Supercontinuum Generation in Tapered Chalcogenide Fibers Reviewed

Lai Liu, Kenshiro Nagasaka, Takenobu Suzuki, Yasutake Ohishi

Advanced Solid State Lasers ATu2A.21 2015

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DOI： 10.1364/assl.2015.ath2a.21
Mid-infrared supercontinuum covering 3–10μm using a As₂Se₃ core and As₂S₅ cladding step-index chalcogenide fiber Reviewed

D.Deng*, ライ　リュウ, Tong Hoang Tuan, Y.Kanou*, M.Matsumoto*, H.Tezuka*, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest (online) 2015 Advanced Solid State Lasers Conference and Exhibition(ASSL) ATu2A.32 2015

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Optical Parametric Oscillator Based on Degenerate Four Wave Mixing in Tellurite Microstructured Optical Fiber Reviewed

レイ　チャン, Tong Hoang Tuan, H.Kawamura*, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest (online) 2015 Advanced Solid State Lasers Conference and Exhibition(ASSL) ATu2A.22 2015

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Fabrication of a Chalcogenide-Tellurite Hybrid Microstructured Optical Fiber for Flattened and Broadband Supercontinuum Generation Reviewed

トンレイ　チャン, M.Liao*, シュエ　シャオジエ, J.Li*, D.Deng*, X.Li*, D.Chen*, S.Zheng*, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest (online) 2015 Advanced Solid State Lasers Conference and Exhibition(ASSL) ATu2A.27 2015

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Flattened supercontinuum generation in tellurite-phosphate and chalcogenide-tellurite hybrid microstructured optical fibers with tailored charomatic dispersion spectra. Reviewed

Tong Hoang Tuan, Zhongchao Duan*, シュエ　シャオジエ, トンレイ　チャン, ディンハン　デン, Morio Matsumoto Furukawa Denshi Co., Ltd.*, Hiroshige Tezuka Furukawa Denshi Co., Ltd*, Takenobu Suzuki, Yasutake Ohishi, 他2名*

Proceedings of 2015 Photonics West 9359 93591I - 1 2015

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Widely tunable soliton self-frequency shift and dispersive wave generation in a highly nonlinear fiber Reviewed

Dinghuan Deng, Tonglei Cheng, Xiaojie Xue, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

OPTICAL COMPONENTS AND MATERIALS XII 9359 935903 - 1 2015 （ ISSN:0277-786X ）

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Widely wavelength tunable soliton self-frequency shift (SSFS) from 1.58 mu m to 2.07 mu m was experimentally demonstrated in a highly nonlinear fiber pumped with a mode-locked sub-100 fs Er-doped fiber laser. The maximum output spectrum (full width at half maximum, FWHM) around 2 mu m is 143 nm. Although the pulse width of SSFS was measured to be a few picoseconds, the large FWHM bandwidth of SSFS spectrum shows that soliton with sub-50 fs could be achieved if the giant chirped pulse is efficiently re-compressed to be transforms limited. Dispersive wave with a minimum pulse width of 50 fs was also observed.

DOI： 10.1117/12.2077865
Broad and Ultra-flat Optical Parametric Gain in Tellurite Hybrid Microstructured Optical Fibers Reviewed

Tonglei Cheng, Tong Hoang Tuan, Edmund Samuel, Dinghuan Deng, Xiaojie Xue, Takenobu Suzuki, Yasutake Ohishi

OPTICAL COMPONENTS AND MATERIALS XII 9359 93591Q - 1 2015 （ ISSN:0277-786X ）

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We present the broad and ultra-flat optical parametric gain in the highly nonlinear tellurite fibers with tailored chromatic dispersion. The effect of pump wavelengths and powers on dual-pump configuration of four-wave mixing ( FWM) are investigated. It is clarified that an ultra-flat gain bandwidth with 658 nm and. 0.01 dB fluctuation can be achieved at the dual-pumping power of 1.25 W. Moreover, a gain bandwidth with 1524 nm and 60 dB signal gain with gain ripples can be obtained at the dual-pumping power of 3.0 W in 25 cm-long hybrid tellurite microstructured optical fiber.

DOI： 10.1117/12.2078446
Chalcogenide amorphous nanoparticles doped poly (methyl mechacrylate) with high nonlinearity for optical waveguide. Reviewed

シュエ　シャオジエ, Kenshiro Nagasaka*, トンレイ　チャン, ディンハン　デン, レイ　チャン, ライ　リュウ, Takenobu Suzuki, Yasutake Ohishi

Proceedings of 2015 Photonics West 9359 935921 - 1 2015

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Chalcogenide amorphous nanoparticles doped poly (methyl methacrylate) with high nonlinearity for optical waveguide Reviewed

Xiaojie Xue, Kenshiro Nagasaka, Tonglei Cheng, Dinghuan Deng, Lei Zhang, Lai Liu, Takenobu Suzuki, Yasutake Ohishi

OPTICAL COMPONENTS AND MATERIALS XII 9359 2015 （ ISSN:0277-786X ）

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Nonlinear optical polymers show promising potential applications in photonics, for example, electro-optical devices. Poly (methyl methacrylate) (PMMA) is widely used in optical waveguides, integrated optics and optical fibers. However, PMMA has not been used for nonlinear optical waveguides since it has a low nonlinear refractive index. We successfully prepared chalcogenide amorphous nanoparticles doped PMMA that had a high nonlinearity. The As3S7 bulk glass was dissolved in propylamine to form a cluster solution. Then the As3S7/propylamine solution was added into methyl methacrylate (MMA) containing photoinitiator Irgacure 184 about 0.5 wt%. After well mixing the As3S7 nanoparticle doped MMA was transparent. Under the irradiation by a 365 nm UV lamp, As3S7 nanoparticles doped PMMA was obtained with yellow color. The third-order nonlinear optical susceptibility of As3S7 nanoparticles doped PMMA was investigated. An optical waveguide array based on the As3S7 nanoparticles doped PMMA composite of high nonlinearity was fabricated.

DOI： 10.1117/12.2081186
Flattened supercontinuum generation in tellurite-phosphate and chalcogenide-tellurite hybrid microstructured optical fibers with tailored chromatic dispersion spectra Reviewed

Tong Hoang Tuan, Hiroyasu Kawashima, Koji Asano, Zhongchao Duan, Xiaojie Xue, Tonglei Cheng, Dinghuan Deng, Morio Matsumoto, Hiroshige Tezuka, Takenobu Suzuki, Yasutake Ohishi

OPTICAL COMPONENTS AND MATERIALS XII 9359 2015 （ ISSN:0277-786X ）

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We report here flattened supercontinuum (SC) generated in tellurite-phosphate and chalcogenide-tellurite hybrid microstructured optical fibers (HMOFs) whose chromatic dispersion spectra are tailored with high freedom due to large refractive index difference (Delta n) between the core and cladding glasses. It is shown in the simulation that the tellurite-phosphate HMOF whose chromatic dispersion spectrum is near-zero and flattened with three zero-dispersion wavelengths (ZDWs) over a wide wavelength range from 1000 to 4000 nm is beneficial to obtain broad and flattened SC spectra. By using a large Delta n of 0.49, the tellurite-phosphate HMOF which has flattened chromatic dispersion and three ZDWs is successfully fabricated. When a 20-cm-long tellurite-phosphate HMOF is pumped at 1550 nm with a 1560-W peak power, an SC extended from similar to 800 to 2400 nm where similar to 5-dB spectral flatness in the wavelength ranges from 890 to 1425 nm and from 1875 to 2400 nm (similar to 1060-nm bandwidth in total) is observed. In addition, a flattened SC spectrum with similar to 6-dB spectral flatness over a broad wavelength range from 950 to 3350 nm (2400-nm bandwidth in total) is generated by pumping a 1-cm-long chalcogenide-tellurite HMOF at 2300 nm with a 40-MW peak power.

DOI： 10.1117/12.2077035
Multi-peak-spectra Generation with Multiple Dispersive Waves and Solitons in a Birefringence Tellurite Microstructured Optical Fiber Reviewed

Tonglei Cheng, Tong Hoang Tuan, Xiaojie Xue, Dinghuan Deng, Takenobu Suzuki, Yasutake Ohishi

ECOC 2015 41ST EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION 2015

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We demonstrate multiple dispersive waves emitted by multiple solitons in a birefringence tellurite microstuctured optical fiber. Obvious multiple soliton self-frequency shifts are observed in the mid-infrared region.
Multiple Raman Soliton Generation in a Birefringence Tellurite Microstructured Optical Fiber Reviewed

Lei Zhang, Tonglei Cheng, Dinghuan Deng, Daisuke Sega, Lai Liu, Takenobu Suzuki, Yasutake Ohishi

2015 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) 2015 （ ISSN:2160-9020 ）

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Based on a birefringence tellurite microstructured optical fiber, multiple solitons are generated by tuning the pump power and the polarization orientation. The central wavelength of the first soliton can be tuned over about 680 nm.
Fabrication of an Optical Fiber Doped with Amorphous Yttrium Aluminosilicate Nanoparticles in the Core for Supercontinuum Generation Reviewed

Tonglei Cheng, Meisong Liao, Xiaojie Xue, Jiang Li, Dinghuan Deng, Xia Li, Danping Chen, Shupei Zheng, Yubai Pan, Takenobu Suzuki, Yasutake Ohishi

Advanced Solid State Lasers 2015

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DOI： 10.1364/assl.2015.atu2a.27
Ultraviolet Emissions of Tb3+ by Three-photon Upconversion Process Reviewed

Xiaojie Xue, Tonglei Cheng, Dinghuan Deng, Takenobu Suzuki, Yasutake Ohishi

Frontiers in Optics 2015 2015

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DOI： 10.1364/fio.2015.jtu4a.4
Fabrication and characterization of a three-core chalcogenide-tellurite hybrid optical fiber. Reviewed

トンレイ　チャン, シュエ　シャオジエ, ディンハン　デン, Morio Matsumoto Furukawa Denshi Co., Ltd.*, Hiroshige Tezuka Furukawa Denshi Co., Ltd.*, Takenobu Suzuki, Yasutake Ohishi

Optics Communications 341 252 - 256 2014.12

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Solar-pumped Laser and its Application to Energy Conversion. Reviewed

Kazuo Hasegawa Toyota central R&D Labs.*, Hiroshi Ito Toyota central R&D Labs*, Shintaro Mizuno Toyota central R&D Labs*, Tadashi Ichikawa Toyota central R&D Labs*, Yasuhiko Takeda Toyota central R&D Labs*, Tomoyoshi Motohiro Nagoya University*, Mitsuo Yamaga Gifu University*, Yasutake Ohishi, Takenobu Suzuki

Proceedings of the OSA Light, Energy and the Environment Optics Congress RTh 2B.1 2014.12

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Mid-infrared soliton generation in a tapered As&#60;inf>2&#60;/inf>S&#60;inf>5&#60;/inf> microstructured optical fiber Reviewed

Tonglei Cheng, Ryo Usaki, Xiaojie Xue, Dinghuan Deng, Yasuhire Kanou, Morio Matsumoto, Takashi Misumi, Takenobu Suzuki, Yasutake Ohishi

Optics InfoBase Conference Papers 2014.10 （ ISBN:1557522863 ）

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Mid-infrared soliton is obtained when the tapered As<inf>2</inf>S<inf>5</inf> microstructured optical fiber is pumped by an optical parametric oscillator at ~1900 nm. At the same time a blue-shift dispersive wave is emitted by the soliton. © 2014 OSA.
Dispersion characterization of two orthogonal mods in a birefringence tellurite microstructured optical fiber. Reviewed

ディンハン　デン, Daisuke Sega*, トンレイ　チャン, Weiqing Gao*, シュエ　シャオジエ, Takenobu Suzuki, Yasutake Ohishi

Optics Express 22 ( 20 ) 23920 - 23927 2014.10

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Flattened supercontinuum generation in a tellurite hybrid microstructured optical fiber. Reviewed

Tong Hoang Tuan*, Zhongchao Duan*, ディンハン　デン, トンレイ　チャン, Takenobu Suzuki, Yasutake Ohishi

Proceedings of OSA Frontiers in Optics/Laser Science 2014 JTu3A.36 2014.10

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Mid-infrared soliton generation in a tapered As₂S₅ microstructured optical fiber. Reviewed

トンレイ　チャン, Ryo Usaki*, シュエ　シャオジエ, ディンハン　デン, Yasuhiro Kanou*, Morio Matsumoto Furukawa Denshi Co., Ltd.*, Takashi Misumi Furukawa Denshi Co., Ltd.*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of OSA Frontiers in Optics/Laser Science 2014 JTu3A.35 2014.10

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Wide-Range Third-Harmonic Generation in a Step-Index Tellurite Fiber. Reviewed

Weiqing Gao Hefei University of Technology*, トンレイ　チャン, ディンハン　デン, シュエ　シャオジエ, Takenobu Suzuki, Yasutake Ohishi

Proceedings of OSA Frontiers in Optics/Laser Science 2014 JTu3A.33 2014.10

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An Elliptical Core Birefringence Tellurite Microstructured Optical Fiber. Reviewed

ディンハン　デン, Daisuke Sega*, トンレイ　チャン, Weiqing Gao*, シュエ　シャオジエ, Takenobu Suzuki, Yasutake Ohishi

Proceedings of OSA Frontiers in Optics/Laser Science 2014 JW3A.21 2014.10

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Slow-light generation and waveform correction via Brillouin scattering in tellurite fiber. Reviewed

Kenshiro Nagasaka*, Guanshi Qin Jilin University*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of OSA Frontiers in Optics Laser Science 2014 JW3A.19 2014.10

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Dispersion characterization of two orthogonal modes in a birefringence tellurite microstructured optical fiber Reviewed

Dinghuan Deng, Daisuke Sega, Tonglei Cheng, Weiqing Gao, Xiaojie Xue, Takenobu Suzuki, Yasutake Ohishi

OPTICS EXPRESS 22 ( 20 ) 23920 - 23927 2014.10 （ ISSN:1094-4087 ）

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An elliptical core tellurite microstructured optical fiber with high birefringence was demonstrated and the chromatic dispersion of the two orthogonal modes in this fiber was experimentally characterized by a white light spectral interferometric technique over a wide spectral range. A series of spectral interferograms as a function of the optical path difference were recorded in the Mach-Zehnder interferometer. The birefringence dependence of the wavelength in the fiber was determined by interferograms. The measured and calculated dispersion matched well within the whole spectrum range under test. (C) 2014 Optical Society of America

DOI： 10.1364/OE.22.023920
Mid-infrared supercontinuum generation in a novel AsSe₂-As₂S₅ hybrid microstructured optical fiber. Reviewed

トンレイ　チャン, Yasuhiro Kanou*, シュエ　シャオジエ, ディンハン　デン, Morio Matsumoto Furukawa Denshi Co., Ltd.*, Takashi Misumi Furukawa Denshi Co., Ltd*, Takenobu Suzuki, Yasutake Ohishi

Optics Express 22 ( 19 ) 23019 - 23025 2014.9

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Solar-pumped fiber lasers and application to photovoltaics. Reviewed

S. Mizuno Toyota Central R&D Labs.*, H. Ito Toyota Central R&D Labs*, K. Hasegawa Toyota Central R&D Labs*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of Advanced Architectures in Photonics 2014 11 2014.9

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カルコゲナイドガラスハイブリッド微細構造光ファイバによるスーパーコンティニューム光の発生 Reviewed

加納靖大*, 浅野晃司*, トンレイ　チャン, 松本守男古河電子株式会社*, 三角孝古河電子株式会社*, 鈴木　健伸, 大石　泰丈

講演予稿集 03 - 591 2014.9

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Highly Efficient Fast Light Generation in a Tellurite Fiber Embedded in Brillouin Laser Ring Cavity Reviewed

Dinghuan Deng, Weiqing Gao, Tonglei Cheng, Edmund E. Samuel, Takenobu Suzuki, Yasutake Ohishi

IEEE PHOTONICS TECHNOLOGY LETTERS 26 ( 17 ) 1758 - 1761 2014.9 （ ISSN:1041-1135 eISSN:1941-0174 ）

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Highly efficient fast light propagation of optical pulse at negative group velocity was demonstrated in a single-mode tellurite fiber embedded in a Brillouin laser ring cavity. A maximum advancement of 385 ns and an average time advancement per unit power of 3.77 ns/mW were observed when the cavity was pumped with a 1-MHz sinusoidal wave signal at a power level of 102 mW. Pump loss of 7.9 dB was also monitored at the maximum fast light generation, showing an average slope efficiency of 48.7 ns/dB.

DOI： 10.1109/LPT.2014.2332470
Mid-infrared supercontinuum generation in a novel AsSe2-As2S5 hybrid microstructured optical fiber Reviewed

Tonglei Cheng, Yasuhire Kanou, Xiaojie Xue, Dinghuan Deng, Morio Matsumoto, Takashi Misumi, Takenobu Suzuki, Yasutake Ohishi

OPTICS EXPRESS 22 ( 19 ) 23019 - 23025 2014.9 （ ISSN:1094-4087 ）

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A novel AsSe2-As2S5 hybrid MOF (HMOF) is designed and fabricated by the rod-in-tube drawing technique. The core is made from AsSe2 glass and the cladding is made from As2S5 glass. The loss is similar to 1.2 dB/m at similar to 3000 nm. Zero dispersion wavelength (ZDW) of the HMOF is similar to 3380 nm. Supercontinuum (SC) generation in a 2 cm-long HMOF is investigated with the pump wavelengths of similar to 3062, 3241 and 3389 nm from a tunable optical parametric oscillator (OPO) system. Broadband mid-infrared (MIR) SC generation with the spectrum from similar to 1256 to 5400 nm is obtained with the peak power of similar to 1337 kW at the wavelength of similar to 3389 nm. (C) 2014 Optical Society of America

DOI： 10.1364/OE.22.023019
Mid-infrared supercontinuum generation in a four-hole As2S5 chalcogenide microstructured optical fiber Reviewed

Weiqing Gao, Zhongchao Duan, Koji Asano, Tonglei Cheng, Dinghuan Deng, Morio Matsumoto, Takashi Misumi, Takenobu Suzuki, Yasutake Ohishi

APPLIED PHYSICS B-LASERS AND OPTICS 116 ( 4 ) 847 - 853 2014.9 （ ISSN:0946-2171 eISSN:1432-0649 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：SPRINGER

We demonstrate the supercontinuum (SC) generation in a four-hole As2S5 chalcogenide microstructured optical fiber (MOF) experimentally. The As2S5 glass has better property of transmission than As2S3 glass in the visible range. The four-hole As2S5 MOF is fabricated by a rod-in-tube method. The SCs generated by different pump wavelengths at 2,000, 2,300 and 2,500 nm in the MOF whose length is from 2.3 to 20 cm are demonstrated. Those pump wavelengths correspond to the chromatic dispersion wavelength in the normal chromatic dispersion region, the anomalous chromatic dispersion region close to zero-dispersion wavelength (ZDW) and the anomalous chromatic dispersion region far from ZDW, respectively. Wider SCs can be obtained when pumped at a wavelength in the anomalous dispersion region close to ZDW. The widest SC range of 4,280 nm (from 1,370 to 5,650 nm) covering two octaves was obtained in a 4.8-cm-long fiber pumped at 2,300 nm.

DOI： 10.1007/s00340-014-5771-8
Third-harmonic generation with a more than 500 nm tunable spectral range in a step-index tellurite fiber Reviewed

Weiqing Gao, Tonglei Cheng, Dinghuan Deng, Xiaojie Xue, Takenobu Suzuki, Yasutake Ohishi

LASER PHYSICS LETTERS 11 ( 9 ) 2014.9 （ ISSN:1612-2011 eISSN:1612-202X ）

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We demonstrate third-harmonic generation (THG) with a tunable spectral range of more than 500 nm in a step-index tellurite fiber. Third-harmonic (TH) signals with a peak wavelength from 524 to 1043 nm are obtained in a 3 cm-long fiber when the fundamental wavelength shifts from 1560 to 3100 nm. To our knowledge, the tunable spectral range covering almost one octave is the widest tunable range of THG in fibers so far. The far-field patterns of the TH signals by 1560 nm to 2100 nm pumping are recorded by a charge coupled device camera, which are close to the fundamental mode profile. The THG in such a wide tunable range is attributable to the high nonlinearity of the tellurite fiber and the high pump peak power of the pump pulse.

DOI： 10.1088/1612-2011/11/9/095106
Optical parametric amplification in dual-pumped highly nonlinear tellurite hybrid microstructured optical fibers with engineered chromatic dispersion. Reviewed

Yasutake Ohishi, Hoang Tuan Tong*, Edmund Samuel*, トンレイ　チャン, Koji Asano*, Takenobu Suzuki

Proceedings of 6th International Conference on Optical, Optoelectronic and Photonic Materials and Applications 260 2014.8

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Tailoring charomatic dispersion in chalcogenide-tellurite microstructured optical fiber. Reviewed

Tomas Kohoutek*, Zhongchao Duan*, Hiroyasu Kawashima*, トンレイ　チャン, Takenobu Suzuki, Morio Matsumoto Furukawa Denshi Co., Ltd.*, Takashi Misumi Furukawa Denshi Co., Ltd*, Yasutake Ohishi

Optical Fiber Technology 20 ( 4 ) 409 - 413 2014.8

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Mid-Infrared Supercontinuum Generation in an AsSe₂ -As₂S₅ Hybrid Microstructured Optical Fiber. Reviewed

トンレイ　チャン, Yasuhiro Kanou*, ディンハン　デン, シュエ　シャオジエ, Morio Matsumoto Furukawa Denshi Co.,Ltd.*, Takashi Misumi Furukawa Denshi Co.,Ltd*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of 5th International Conference on Optical Communication Systems 77 - 82 2014.8

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Energy Transfer between Cr³⁺ and Nd³⁺ in LiCaAIF₆ for Solar-pumped Laser Media. Reviewed

Yasutake Ohishi, シュエ　シャオジエ, Takenobu Suzuki

Proceedings of 6th International Conference on Optical, Optoelectronic and Photonic Materials and Applications 259 2014.8

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Tailoring chromatic dispersion in chalcogenide-tellurite microstructured optical fiber Reviewed

Tomas Kohoutek, Zhongchao Duan, Hiroyasu Kawashima, Tonglei Cheng, Takenobu Suzuki, Morio Matsumoto, Takashi Misumi, Yasutake Ohishi

OPTICAL FIBER TECHNOLOGY 20 ( 4 ) 409 - 413 2014.8 （ ISSN:1068-5200 eISSN:1095-9912 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE INC

We report fabrication of a highly nonlinear hybrid microstructured optical fiber composed of chalcogenide glass core and tellurite glass cladding. The flattened chromatic dispersion can be achieved in such an optical fiber with near zero dispersion wavelength at telecommunication wavelengths lambda = 1.35-1.7 mu m, which cannot be achieved in chalcogenide glass optical fibers due to their high refractive index, i.e. n > 2.1. We demonstrate a hybrid 4-air hole chalcogenide-tellurite optical fiber (Delta n = 0.25) with flattened chromatic dispersion around lambda = 1.55 mu m. In optimized 12-air hole optical fiber composed of the same glasses, the chromatic dispersion values were achieved between -20 and 32 ps/nm/km in a broad wavelength range of 1.5-3.8 mu m providing the fiber with extremely high nonlinear coefficient 86,000 km(-1) W-1. Hybrid chalcogenide/tellurite fibers pumped with the near infrared lasers give good promise for broadband optical amplification, wavelength conversion, and supercontinuum generation in the near- to mid-infrared region. (C) 2014 Elsevier Inc. All rights reserved.

DOI： 10.1016/j.yofte.2014.05.004
Luminescent properties of Nd3+/Cr3+-doped LiCaAlF6 flower-like microcrystals Reviewed

Xiaojie Xue, Tonglei Cheng, Takenobu Suzuki, Yasutake Ohishi

Optics InfoBase Conference Papers 2014.7 （ ISBN:9781943580194 ）

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Language：English Publishing type：Research paper (international conference proceedings) Publisher：OSA - The Optical Society

Under the excitation of a 650 nm laser, the Nd3+/Cr3+-doped LiCaAlF6 flower-like microcrystals showed an intense near-infrared emission at 1045 nm attributed to sufficient energy transfer from Cr3+ to Nd3+.

DOI： 10.1364/FIO.2016.JTh2A.100
Experimental and numerical study on stimulated raman scattering in asSe2-as2S5 microstructured optical fiber Reviewed

Weiqing Gao, Xue Li, Qiang Xu, Xiangcai Chen, Chenquan Ni, Li Chen, Zhengqiang Wen, Tonglei Cheng, Xiaojie Xue, Takenobu Suzuki, Yasutake Ohishi

Optics InfoBase Conference Papers 2014.7 （ ISBN:9781943580194 ）

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Language：English Publishing type：Research paper (international conference proceedings) Publisher：OSA - The Optical Society

We demonstrate the stimulated Raman scattering effect in AsSe2-As2S5 microstructured optical fiber. The first-order Stokes wave is obtained with the conversion efficiency of -15.0 dB. The simulated results agree well with the experiments.

DOI： 10.1364/FIO.2016.JW4A.188
Supercontinuum generation in an AsSe2-As2S5 step-index fiber Reviewed

Weiqing Gao, Qiang Xu, Xue Li, Li Chen, Xiangcai Chen, Chenquan Ni, Zhengqiang Wen, Tonglei Cheng, Xiaojie Xue, Takenobu Suzuki, Yasutake Ohishi

Optics InfoBase Conference Papers 2014.7 （ ISBN:9781943580194 ）

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Language：English Publishing type：Research paper (international conference proceedings) Publisher：OSA - The Optical Society

We demonstrate the supercontinuum generation in an AsSe2-As2S5 step-index fiber. The SCs are investigated by changing the pump wavelength and the fiber length. The maximum spectral range covers one octave from 1550 to 3300 nm.

DOI： 10.1364/FIO.2016.JW4A.199
Waveguides in Ni-doped glass and glass-ceramic written with a 1 kHz femtosecond laser Reviewed

M. A. Hughes, K. P. Homewood, R. J. Curry, Y. Ohishi, T. Suzuki

OPTICAL MATERIALS 36 ( 9 ) 1604 - 1608 2014.7 （ ISSN:0925-3467 eISSN:1873-1252 ）

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We report waveguides in Ni-doped Li2O-Ga2O3-SiO2 (Ni:LGS) glass and glass-ceramic (GC) fabricated with a femtosecond (fs) laser with repetition rate of 1 kHz. When the glass is annealed to form a GC, the waveguides are erased. However, in the GC the waveguides are not erased by annealing. In Ni:LGS GC a 415 nm absorption band was created by fs laser waveguide writing due to the creation of Ni nanoparticles with an estimated diameter of a few nm. Raman and photoluminescence spectra of the bulk and waveguide structures were indistinguishable; however, fluorescence decay profiles indicated more long lifetime components in the waveguide compared to the bulk. (C) 2014 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.optmat.2014.04.042
Ultra-flat and broadband optical parametric amplification in highly nonlinear tellurite hybrid microsturctured optical fibers. Reviewed

Tong Hoang Tuan*, Edmund Samuel*, トンレイ　チャン, Zhongchao Duan*, Koji Asano*, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest of Advanced Photonics 2014 JM5A.22 2014.7

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Supercontinuum Generation in a Three-core Chalcogenide-tellurite Fiber. Reviewed

トンレイ　チャン, シュエ　シャオジエ, ディンハン　デン, Morio Matsumoto Furukawa Denshi Co., Ltd.*, Takashi Misumi Furukawa Denshi Co., Ltd*, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest of Advanced Photonics 2014 JM5A.14 2014.7

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Supercontinuum Generation in a Chalcogenide Hybrid Microstructured Optical Fiber. Reviewed

Hiroyasu Kawashima*, トンレイ　チャン, Morio Matsumoto Furukawa Denshi Co., Ltd.*, Takashi Misumi Furukawa Denshi Co., Ltd*, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest of Advanced Photonics 2014 SoW4B.5 2014.7

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SOLAR-PUMPED LASERS AND APPLICATION TO PHOTOVOLTAICS.(1) Reviewed

Kazuo Hasegawa Toyota Central R&D Labs., Inc.*, Shintaro MIzuno Toyota Central R&D Labs., Inc*, Hiroshi Ito Toyota Central R&D Labs., Inc*, Tadashi Ichikawa Toyota Central R&D Labs., Inc*, Tomoyoshi Motohiro Nagoya University*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of Grand Renewable Energy 2014 International Conference and Exhibition P - Pv 2014.7

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Third-harmonic generation with a more than 500nm tunable spectral range in a step-index tellurtie fiber. Reviewed

Weiqing Gao Hefei University of Technology*, トンレイ　チャン, ディンハン　デン, シュエ　シャオジエ, Takenobu Suzuki, Yasutake Ohishi

Laser Physics Letters 11 ( 9 ) 1 - 5 2014.7

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Quenching effect of surface adsorbed ligands on luminescence of alpha-NaYF4:Nd3+ nanocrystals Reviewed

Xiaojie Xue, Takenobu Suzuki, Rajanish N. Tiwari, Masamichi Yoshimura, Yasutake Ohishi

JAPANESE JOURNAL OF APPLIED PHYSICS 53 ( 7 ) 2014.7 （ ISSN:0021-4922 eISSN:1347-4065 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：IOP PUBLISHING LTD

Oleate-capped alpha-NaYF4:1% Nd3+ nanocrystals (NCs) of various sizes were successfully synthesized by a solvothermal method. Citrate-capped and Polyethylenimine (PEI)-capped alpha-NaYF4:1%Nd3+ NCs were prepared via ligand exchange reactions of oleate-capped samples. Under the excitation at 808 nm, all samples showed intense near-infrared (NIR) emissions. Quantum efficiencies (QEs) and emission lifetimes of samples of various sizes and different adsorbed ligands were measured. The quenching effects of the adsorbed ligands were investigated using a quenching model. It was observed that the ligands with long methylene groups strengthened the quenching effect that led to low QEs and short emission lifetimes. (C) 2014 The Japan Society of Applied Physics

DOI： 10.7567/JJAP.53.075001
Continuous-wave four-wave mixing in a single-mode tellurite fiber Reviewed

Tonglei Cheng, Dinghuan Deng, Xiaojie Xue, Takenobu Suzuki, Yasutake Ohishi

APPLIED PHYSICS LETTERS 104 ( 25 ) 251903 - 1 2014.6 （ ISSN:0003-6951 eISSN:1077-3118 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：AMER INST PHYSICS

Four-wave mixing in a 6-m long single-mode tellurite (78TeO(2)-5Bi(2)O(3)-5ZnO-12Na(2)O, mol%, TBZN) fiber was experimentally observed with the continuous-wave (CW) pump wavelengths changing from similar to 1530 to 1565 nm. Conversion efficiency of similar to-20 dB was obtained with the CW signal input power of similar to 5 mW at the pump wavelength of similar to 1565 nm. The optical signal gain in the TBZN tellurite fiber was numerically simulated, and the result agreed well with the experiment. (C) 2014 AIP Publishing LLC.

DOI： 10.1063/1.4884651
Quenching effect of surface adsorbed ligands on luminescence of α-NaYF₄:Nd³⁺ nanocrystals. Reviewed

シュエ　シャオジエ, Takenobu Suzuki, Rajanish N. Tiwari*, 吉村　雅満, Yasutake Ohishi

Japanese Journal of Applied Physics 53 075001 - 1 2014.6

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Experimental Observation Tunable Second-harmonic Generation in a Chalcogenide-tellurite Hybrid Optical Fiber. Reviewed

トンレイ　チャン, Weiqing Gao*, Hiroyasu Kawashima*, ディンハン　デン, Meisong Liao*, Morio Matsumoto Furukawa Denshi Co., Ltd.*, Takashi Misumi Furukawa Denshi Co., Ltd.*, Takenobu Suzuki, Yasutake Ohishi

CLEO:2014 Technical Digest © OSA SM4N.5 2014.6

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Optical properties of Er-doped fluoride glasses for solar-pumped laser applications. Reviewed

Takenobu Suzuki, Yasuyuki Iwata*, Yasutake Ohishi

CLEO:2014 Technical Digest © OSA JW2A.60 2014.6

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Highly Efficient Fast Light Generation in a Single-mode Tellurite Fiber Embedded in a Brillouin Laser Ring Cavity. Reviewed

ディンハン　デン, Weiqing Gao*, トンレイ　チャン, E. E. Samuel*, Takenobu Suzuki, Yasutake Ohishi

CLEO:2014 Technical Digest © OSA JTu4A.65 2014.6

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Supercontinuum Generation in an As₂S₅ Chalcogenide Microstructured Optical Fiber. Reviewed

Weiqing Gao Hefei University of Technology*, Zhongchao Duan*, Koji Asano*, トンレイ　チャン, ディンハン　デン, Morio Matsumoto Furukawa Denshi Co., Ltd.*, Takashi Misumi Furukawa Denshi Co., Ltd.*, Takenobu Suzuki, Yasutake Ohishi

CLEO:2014 Technical Digest © OSA STh3N.3 2014.6

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Fabrication and characterization of a hybrid four-hole AsSe2-As2S5 microstructured optical fiber with a large refractive index difference Reviewed

Tonglei Cheng, Yasuhire Kanou, Dinghuan Deng, Xiaojie Xue, Morio Matsumoto, Takashi Misumi, Takenobu Suzuki, Yasutake Ohishi

OPTICS EXPRESS 22 ( 11 ) 13322 - 13329 2014.6 （ ISSN:1094-4087 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：OPTICAL SOC AMER

A hybrid four-hole AsSe2-As2S5 microstructured optical fiber (MOF) with a large refractive index difference is fabricated by the rod-intube drawing technique. The core and the cladding are made from the AsSe2 glass and As2S5 glass, respectively. The propagation loss is similar to 1.8 dB/m and the nonlinear coefficient is similar to 2.03 x 10(4) km(-1)W(-1)at 2000 nm. Raman scattering is observed in the normal dispersion regime when the fiber is pumped by a 2 mu m mode-locked picosecond fiber laser. Additionally, soliton is generated in the anomalous dispersion regime when the fiber is pumped by an optical parametric oscillator (OPO) at the pump wavelength of similar to 3000 nm. (C) 2014 Optical Society of America

DOI： 10.1364/OE.22.013322
Design and optimizaion of tellurite hybrid microstructured optical fiber with high nonlinearity and low flattened chromatic dispersion for optical parametric amplification. Reviewed

トンレイ　チャン, Koji Asano*, Zhongchao Duan*, Tong Hoang Tuan*, Weiqing Gao*, ディンハン　デン, Takenobu Suzuki, Yasutake Ohishi

Optics Communications 318 105 - 111 2014.5

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Fabrication and characterization of a hybrid four-hole AsSe₂-As₂S₅ microstructured optical fiber with a large refrative index difference. Reviewed

トンレイ　チャン, Yasuhiro Kanou*, ディンハン　デン, シュエ　シャオジエ, Morio Matsumoto Furukawa Denshi Co., Ltd.*, Takashi Misumi Furukawa Denshi Co., Ltd*, Takenobu Suzuki, Yasutake Ohishi

Optics Express 22 ( 11 ) 13322 - 13329 2014.5

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Design and optimization of tellurite hybrid microstructured optical fiber with high nonlinearity and low flattened chromatic dispersion for optical parametric amplification Reviewed

Tonglei Cheng, Koji Asano, Zhongchao Duan, Tong Hoang Tuan, Weiqing Gao, Dinghuan Deng, Takenobu Suzuki, Yasutake Ohishi

OPTICS COMMUNICATIONS 318 105 - 111 2014.5 （ ISSN:0030-4018 eISSN:1873-0310 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

The linear phase-mismatch and the optical signal gain in the highly nonlinear tellurite hybrid microstructured optical fiber based on the degenerate four-wave mixing are numerically simulated. The core and the cladding of this fiber are designed by TeO2-Li2O-WO3-MoO3-Nb2O5 and TeO2-ZnO-Na2CO3-P2O5 glass, respectively. This fiber has high nonlinearity and at the same time the chromatic dispersion is flattened and close to zero. High optical signal gain and broad band can be obtained by using a short length of this fiber with low pump power. (C) 2014 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.optcom.2013.12.073
Widely tunable second-harmonic generation in a chalcogenide-tellurite hybrid optical fiber. Reviewed

トンレイ　チャン, Weiqing Gao*, Hiroyasu Kawashima*, ディンハン　デン, Meisong Liao*, Morio Matsumoto Furukawa Denshi Co., Ltd.*, Takashi Misumi Furukawa Denshi Co., Ltd.*, Takenobu Suzuki, Yasutake Ohishi

Optics Letters 39 ( 7 ) 2145 - 2147 2014.4

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Soliton self-frequency shift and dispersive wave in a hybrid four-hole A_sSe₂-As₂S₅ microstructured optical fiber Reviewed

トンレイ　チャン, Yasuhire Kanou*, Koji Asano*, ディンハン　デン, Meisong Liao*, Morio Matsumoto*, Takashi Misumi*, Takenobu Suzuki, Yasutake Ohishi

Applied Physics Letters 104 ( 12 ) 121911 - 1 2014.3

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Tunable Third-harmonic Generation in a Novel Chalcogenide-tellurite Hybrid Optical Fiber. Reviewed

トンレイ　チャン, ディンハン　デン, ガオウェイチン, ゾオンチャオ　デュアン, Takenobu Suzuki, Yasutake Ohishi

Optical Fiber Communication Conference, OSA technical Digest Th2A.65 2014.3

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Negative group velocity propagation by combination of an EDFA and a SBS laser ring cavity. Reviewed

ディンハン　デン, ガオウェイチン, ゾオンチャオ　デュアン, トンレイ　チャン, Takenobu Suzuki, Yasutake Ohishi

Optical Fiber Communication Conference, OSA technical Digest Th2A.46 2014.3

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Soliton self-frequency shift and dispersive wave in a hybrid four-hole AsSe2-As2S5 microstructured optical fiber Reviewed

Tonglei Cheng, Yasuhire Kanou, Koji Asano, Dinghuan Deng, Meisong Liao, Morio Matsumoto, Takashi Misumi, Takenobu Suzuki, Yasutake Ohishi

APPLIED PHYSICS LETTERS 104 ( 12 ) 2014.3 （ ISSN:0003-6951 eISSN:1077-3118 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：AMER INST PHYSICS

A hybrid four-hole AsSe2-As2S5 microstructured optical fiber (MOF) is fabricated by the rod-in-tube drawing technique. The core is made of AsSe2 glass and the cladding is made of As2S5 glass. The material refractive indices of the core and the cladding are similar to 2.832 and similar to 2.219 at the wavelength of similar to 2.8 mu m, respectively. The calculated zero-dispersion wavelength of the AsSe2-As2S5 MOF is 2.759 mu m. Soliton self-frequency shift with a soliton central wavelength from 2.986 to 3.419 mu m is observed when the AsSe2-As2S5 MOF is pumped by an optical parametric oscillator at the pump wavelength of similar to 2.8 mu m. At the same time a blue-shift dispersive wave is emitted by the soliton. (C) 2014 AIP Publishing LLC.

DOI： 10.1063/1.4869756
Soliton self-frequency shift and third-harmonic generation in a four-hole As₂S₅ microstructured optical fiber. Reviewed

トンレイ　チャン, ゾオンチャオ　デュアン, ガオウェイチン, ディンハン　デン, Meisong Liao*, Morio Matsumoto Furukawa Denshi Co., Ltd.*, Takashi Misumi Furukawa Denshi Co., Ltd*, Takenobu Suzuki, Yasutake Ohishi, 他2名*

Optics Express 22 ( 4 ) 3740 - 3746 2014.2

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Tunable third-harmonic generation in a chalcogenide-tellurite hybrid optical fiber with high refractive index difference. Reviewed

トンレイ　チャン, ガオウェイチン, Meisong Liao*, ゾオンチャオ　デュアン, ディンハン　デン, Morio Matsumoto Furukawa Denshi Co., Ltd.*, Takashi Misumi Furukawa Denshi Co., Ltd.*, Takenobu Suzuki, Yasutake Ohishi

Optics Letters 39 ( 4 ) 1005 - 1007 2014.2

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Mid-infrared supercontinuum generation in a four-hole As₂S₅ chalcogenide microstructured optical fiber. Reviewed

ガオウェイチン, ゾオンチャオ　デュアン, Koji Asano*, トンレイ　チャン, ディンハン　デン, Morio Matsumoto Furukawa Denshi Co., Ltd.*, Takashi Misumi Furukawa Denshi Co., Ltd.*, Takenobu Suzuki, Yasutake Ohishi

Applied Physics B 2014.2

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Theoretical investigation of pulse-dependent optical parametric amplification for microstructured optical fiber. Reviewed

エドモンド　サミュエル, T. H. Tong*, K. Asano*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 8982 89821ｘ - 1 2014.2

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Light-induced self-written waveguides based on NaYF4/polymer composites for the C-band amplification. Reviewed

シュエ　シャオジエ, T. Yamashita Toyota Central R&D Labs.,Inc.,*, ガオウェイチン, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 8982 89821ｗ - 1 2014.2

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A highly-nonlinear three-core chalcogenide-tellurite fiber. Reviewed

トンレイ　チャン, ゾオンチャオ　デュアン, N. Asyikin*, ガオウェイチン, ディンハン　デン, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 8982 89821Ｐ - 1 2014.2

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Superluminal propagation in a highly-nonlinear fiber embedded in a Brillouin laser ring cavity. Reviewed

D. Deng, W. Gao, M. Liao, Z. Duan, T. Cheng, T. Suzuki, and Y. Ohishi

Proceedings of SPIE 8982 89821J - 1 2014.2

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Experimental and theoretical study of supercontinuum generation in an As₂S₃ chalcogenide microstructured optical fiber. Reviewed

W. Gao, M. E. Amraoui, M. Liao, H. Kawashima, Z. Duan, D. Deng, T. Cheng, T. Suzuki, Y. Messaddeq, and Y. Ohishi

Proceedings of SPIE 8982 89821ｋ - 1 2014.2

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Broadband optical parametric gain by novel highly-nonlinear tellurite hybrid microstructured optical fiber with four zero-dispersion wavelengths. Reviewed

T. H. Tuan*, トンレイ　チャン, K. Asano*, ゾオンチャオ　デュアン, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 8982 89821Ｌ - 1 2014.2

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Dispersive wave generation in a tellurite hybrid microstructured optical fiber with two zero dispersion wavelengths. Reviewed

ゾオンチャオ　デュアン, ディンハン　デン, T. H. Tong*, シュエ　シャオジエ, トンレイ　チャン, ガオウェイチン, Meisong Liao*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 2014.2

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Soliton self-frequency shift and third-harmonic generation in a four-hole As2S5 microstructured optical fiber Reviewed

Tonglei Cheng, Ryo Usaki, Zhongchao Duan, Weiqing Gao, Dinghuan Deng, Meisong Liao, Yasuhire Kanou, Morio Matsumoto, Takashi Misumi, Takenobu Suzuki, Yasutake Ohishi

OPTICS EXPRESS 22 ( 4 ) 3740 - 3746 2014.2 （ ISSN:1094-4087 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：OPTICAL SOC AMER

Soliton self-frequency shift (SSFS) and third-harmonic generation (THG) are observed in a four-hole As2S5 chalcogenide microstructured optical fiber (MOF). The As2S5 MOF is tapered to offer an ideal environment for SSFS. After tapering, the zero-dispersion wavelength (ZDW) shifts from 2.02 to 1.61 mu m, and the rate of SSFS can be enhanced by increasing the energy density of the pulse. By varying the average input power from 220 to 340 mW, SSFS of a soliton central wavelength from 2.206 to 2.600 mu m in the mid-infrared is observed in the tapered segment, and THG at 632 nm is observed in the untapered segment. (C) 2014 Optical Society of America

DOI： 10.1364/OE.22.003740
Mid-infrared soliton generation in a tapered As2S5 microstructured optical fiber Reviewed

Tonglei Cheng, Ryo Usaki, Xiaojie Xue, Dinghuan Deng, Yasuhire Kanou, Morio Matsumoto, Takashi Misumi, Takenobu Suzuki, Yasutake Ohishi

Frontiers in Optics 2014 2014

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Publishing type：Research paper (international conference proceedings) Publisher：OSA

DOI： 10.1364/fio.2014.jtu3a.35
Experimental and theoretical study of supercontinuum generation in an As2S3 chalcogenide microstructured optical fiber Reviewed

Weiqing Gao, Mohammed El Amraoui, Meisong Liao, Hiroyasu Kawashima, Zhongchao Duan, Dinghuan Deng, Tonglei Cheng, Takenobu Suzuki, Younes Messaddeq, Yasutake Ohishi

OPTICAL COMPONENTS AND MATERIALS XI 8982 2014 （ ISSN:0277-786X eISSN:1996-756X ）

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Language：English Publishing type：Research paper (international conference proceedings) Publisher：SPIE-INT SOC OPTICAL ENGINEERING

Alternative materials to silica glass are necessary for supercontinuum (SC) generation at longer wavelengths in the mid-infrared (MIR) region. The alternative materials should possess the properties of wide transmission window and high nonlinearity, simultaneously. Chalcogenide glass is the suitable candidate due to its excellent properties of transmission and nonlinearity in MIR region. In this paper, we demonstrate the SC generation in a suspended-core As2S3 chalcogenide microstructured optical fiber (MOF). The variation of SC is investigated by changing the fiber length, pump peak power and pump wavelength. In the case of long fibers (20 and 40 cm), the SC ranges are discontinuous and stop at the wavelengths shorter than 3500 nm, due to fiber absorption. In the case of short fiber as 2.4 cm, the SC range is continuous and can extend to the wavelengths longer than 4 m. The process of SC broadening is observed when the pump peak power increases from 0.24 to 1.32 kW at 2500 nm in the 2.4 cm long fiber. The variation of SC range with the pump wavelength changing from 2200 to 2600 nm is studied. The selected wavelengths correspond to the dispersion of As2S3 MOF from the normal to anomalous region. The SC generation is simulated by the generalized nonlinear Schrodinger equation. The simulation includes the SC difference between 1.3 and 2.4 cm long fiber at 2500 nm pumping and the variation of SC with pump peak power in 2.4 cm long fiber. The simulation agrees well with the experiment.

DOI： 10.1117/12.2037183
Mid-infrared supercontinuum generation in an AsSe<inf>2</inf>-As<inf>2</inf>S<inf>5</inf> hybrid microstructured optical fiber Reviewed

Tonglei Cheng, Yasuhire Kanou, Dinghuan Deng, Xiaojie Xue, Morio Matsumoto, Takashi Misumi, Takenobu Suzuki, Yasutake Ohishi

OPTICS 2014 - Proceedings of the 5th International Conference on Optical Communication Systems, Part of ICETE 2014 - 11th International Joint Conference on e-Business and Telecommunications 77 - 82 2014 （ ISBN:9789897580444 ）

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A four-hole AsSe2-As2S5 hybrid microstructured optical fiber (HMOF) with a large refractive index difference is fabricated by the rod-in-tube drawing technique. The core and the cladding are made from the AsSe2 glass and As2S5 glass, respectively. The propagation loss is ∼1.2 dB/m and the nonlinear coefficient is ∼4.937×104 km-1W-1at ∼3000 nm. Zero dispersion wavelength (ZDW) of the HMOF is ∼3380 nm. Supercontinuum (SC) generation in the HMOF is investigated by pumping a 2 cm-long AsSe2-As2S5 HMOF with the wavelengths of ∼3062, 3241 and 3389 nm from a tunable optical parametric oscillator (OPO) system. Broadband mid-infrared SC generation with the spectrum from ∼1256 to 6385 nm is obtained with the peak power of ∼1337 kW at the wavelength of ∼3389 nm.
Ultra-flat and broadband optical parametric amplification in highly nonlinear tellurite hybrid microstructured optical fibers Reviewed

Tong Hoang Tuan, Edmund Samuel, Tonglei Cheng, Zhongchao Duan, Koji Asano, Takenobu Suzuki, Yasutake Ohishi

Advanced Photonics 2014

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Publishing type：Research paper (international conference proceedings) Publisher：OSA

DOI： 10.1364/bgpp.2014.jm5a.22
Supercontinuum Generation in an As2S5 Chalcogenide Microstructured Optical Fiber Reviewed

Weiqing Gao, Zhongchao Duan, Koji Asano, Tonglei Cheng, Dinghuan Deng, Morio Matsumoto, Takashi Misumi, Takenobu Suzuki, Yasutake Ohishi

2014 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) 2014 （ ISSN:2160-9020 ）

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Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

We demonstrate the supercontinuum generation in an As2S5 microstructured optical fiber experimentally. The SC bandwidth of 4280 nm wider than two octaves covering from 1370 to 5650 nm is obtained in 4.8 cm long fiber. (C) 2013 Optical Society of America
Supercontinuum generation in two kinds of chalcogenide microstructured optical fibers Reviewed

Weiqing Gao, Jigang Hu, Yuan Li, Huaili Qiu, Zijun Yuan, Feng Gao, Zhongchao Duan, Takenobu Suzuki, Yasutake Ohishi

OPTOELECTRONIC DEVICES AND INTEGRATION V 9270 2014 （ ISSN:0277-786X ）

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Language：English Publishing type：Research paper (international conference proceedings) Publisher：SPIE-INT SOC OPTICAL ENGINEERING

Chalcogenide microstructured fibers (MOFs) have great advantages for supercontinuum (SC) generation in mid-infrared (MIR) region, because they possess the properties of high nonlinearity and wide transmission window, simultaneously. The nonlinear parameters of chalcogenide MOFs can be higher by several tens or hundreds than those of silica, fluoride and tellurite fibers depending on the material components and fiber structures. Chalcogenide MOF can be transparent from visible up to the infrared region of 12 or 15 mu m depending on the compositions. In this paper, we demonstrate the SC generation in two kinds of suspended-core chalcogenide MOFs with different material components and fiber structures. One is an As2S3 MOF with three-hole structure (Fiber I). The other is an As2S5 MOF with four-hole structure (Fiber II). For Fiber I, the SC range of 3020 nm (from 1510 to 4530 nm) were obtained in a 2.4 cm fiber, when pumped by the wavelength at 2500 nm. The SC extends to the wavelengths longer than 4 mu m. For Fiber II, the SC range of 4280 nm (from 1370 to 5650 nm) is generated in a 4.8 cm fiber when pumped by the wavelength at 2300 nm, which covers more than two octaves. Compared to the SC generated in Fiber I, the SC spectral range in Fiber II has been increased by more than 1200 nm due to the better transmission property of the As2S5 glass; the SC extends to the wavelengths longer than 5 mu m.

DOI： 10.1117/12.2073353
高非線形ハイブリッド微細構造光ファイバによる広帯域光波制御 Reviewed

浅野　晃司*, Tong Hoang Tuan*, ゾオンチャオ　デュアン, 鈴木　健伸, 大石　泰丈

講演要旨集 89 2013.12

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Negative group velocity propagation in a highly nonlinear fiber embedded in a stimulated Brillouin scattering laser ring cavity Reviewed

Dinghuan Deng, Weiqing Gao, Meisong Liao, Zhongchao Duan, Tonglei Cheng, Takenobu Suzuki, Yasutake Ohishi

APPLIED PHYSICS LETTERS 103 ( 25 ) 251110 - 1 2013.12 （ ISSN:0003-6951 eISSN:1077-3118 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：AMER INST PHYSICS

Superluminal propagation at negative group velocity was demonstrated in a highly nonlinear fiber embedded in a stimulated Brillouin scattering laser ring cavity. A maximum advancement of 369 ns and strong Stokes lasing power of 482mW were observed when the cavity was pumped with a 1MHz sinusoidal wave modulated signal at the power level of 1W. The frequency dependence of fast light in this fiber ring cavity was examined with modulation frequencies of 1 kHz to 15 MHz, a maximum fractional advancement of 0.54 was achieved at 10 kHz, and a maximum negative group index of -9480 was demonstrated at 1 kHz. (C) 2013 AIP Publishing LLC.

DOI： 10.1063/1.4852735
微細構造光ファイバの波長分散特性 Reviewed

瀬賀　大輔*, ディンハン　デン, 鈴木　健伸, 大石　泰丈

講演要旨集 88 2013.12

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テーパー化した微細構造光ファイバを用いたスーパーコンティニューム光発生 Reviewed

宇崎　良*, トンレイ　チャン, 鈴木　健伸, 大石　泰丈

講演要旨集 90 2013.12

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カルコゲナイド微細構造光ファイバを用いたスーパーコンティニューム光発生 Reviewed

川島　浩靖*, トンレイ　チャン, 鈴木　健伸, 大石　泰丈

講演要旨集 92 2013.12

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Er³⁺添加ガラスを用いた太陽光励起ファイバレーザの実現可能性 Reviewed

岩田　靖之*, Takenobu Suzuki, 大石　泰丈

講演要旨集 91 2013.12

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Ultra-Broadband Mid-Infrared Supercontinuum Generation in Fluoride Glass. Reviewed

Meisong Liao*, ガオウェイチン, トンレイ　チャン, Xiaojie Xue*, ゾオンチャオ　デュアン, ディンハン　デン, Hiroyasu Kawashima*, Takenobu Suzuki, Yasutake Ohishi

Advanced Solid-State Lasers Congress Technical Digest (c)OSA 2013 MW1C.9 2013.10

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Linearly Polarized Third-Harmonic Generation in an Elliptical-Core Fluoride Fiber. Reviewed

ガオウェイチン, Kazuhiko Ogawa Fiber Labs Inc.*, Xiaojie Xue*, Meisong Liao*, ディンハン　デン, トンレイ　チャン, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest (online) FTu3A.27 2013.10

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Size-dependent Luminescence of Nd³⁺-doped LiYF₄ Nanocrystals. Reviewed

Xiaojie Xue*, Takenobu Suzuki, ラジャニシュ　ティワリ, 吉村　雅満, Yasutake Ohishi

OSA Technical Digest (online) FTu3A.19 2013.10

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Tunable Brillouin Comb Lasing Based on a Single-Mode Tellurite Fiber in a Composite Cavity. Reviewed

ガオウェイチン, Meisong Liao*, トンレイ　チャン, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest (online) FTu3A.33 2013.10

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Linearly Polarized Third-Harmonic Generation in an Elliptical-Core Fluoride Fiber. Reviewed

ガオウェイチン, Kazuhiko Ogawa Fiber Labs. Inc.*, Xiaojie Xue*, Meisong Liao*, ディンハン　デン, トンレイ　チャン, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest (online) FTu3A.27 2013.10

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New phospho-tellurite glasses with optimization of transition temperature and refractive index for hybrid microstructured optical fibers Reviewed

Zhongchao Duan, Hoang Tuan Tong, Meisong Liao, Tonglei Cheng, Motillon Erwan, Takenobu Suzuki, Yasutake Ohishi

OPTICAL MATERIALS 35 ( 12 ) 2473 - 2479 2013.10 （ ISSN:0925-3467 eISSN:1873-1252 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

The glass formation and compositional dependences of glass thermal properties and optical properties were investigated in TeO2-ZnO-Na2O-P2O5 system. The refractive index at 1.55 gm and glass transition temperature varied in a wide range from 1.513 to 2.036 and from 265 degrees C to 376 degrees C by controlling of the TeO2/P2O5 and ZnO/Na2O content, respectively. These properties enable phospho-tellurite glasses with large freedom in designing and fabrication of hybrid microstructured optical fiber. The structures of glasses were investigated by Raman spectra to understand their dependence of structure on composition. Using the present glasses, some hybrid microstructured optical fibers with various dispersion profiles were designed. (C) 2013 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.optmat.2013.07.001
As₂S₅ 微細構造光ファイバによるスーパーコンティニュウム光の発生。 Reviewed

加納靖大*, 浅野晃司*, ゾオンチャオ　デュアン, ガオウェイチン, 松本守男古河電子㈱*, 三角孝古河電子㈱*, 鈴木　健伸, 大石　泰丈

講演予稿集 05 - 112 2013.9

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Quantum efficiency of Nd³⁺-doped phosphate glass under simulated sunlight. Reviewed

Kohei Nogata*, Takenobu Suzuki, Yasutake Ohishi

Optical Materials 35 ( 11 ) 1918 - 1921 2013.9

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Experimental Observation of Third-Harmonic Generation in a ZBLAN Fluoride Fiber with Elliptical Core. Reviewed

ガオウェイチン, Kazuhiko Ogawa FiberLabs Inc.*, Xiaojie Xue*, Meisong Liao*, ディンハン　デン, トンレイ　チャン, Takenobu Suzuki, Yasutake Ohishi

Conference Proceedings 1 - 2 2013.9

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Optical parametric gain and badwidth in highly nonlinear tellurite hybrid microstructured optical fiber with four zero-dispersion wavelengths. Reviewed

Tong Hoan Tuan*, トンレイ　チャン, Koji Asano*, ゾオンチャオ　デュアン, ガオウェイチン, ディンハン　デン, Takenobu Suzuki, Yasutake Ohishi

Optics Express 21 ( 17 ) 20303 - 20312 2013.8

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太陽光励起ファイバレーザ用ガラスレーザ媒質 Reviewed

鈴木　健伸

光アライアンス 24 ( 8 ) 10 - 14 2013.8

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Authorship：Lead author Publishing type：Research paper (scientific journal) Publisher：日本工業出版
Numerical Simulation of Dynamic Bandgap Control in All-Solid Chalcogenide-Tellurite Photonic Bandgap Fiber Reviewed

Tonglei Cheng, Yukiko Sakai, Nur Asyikin, Weiqing Gao, Zhongchao Duan, Dinghuan Deng, Takenobu Suzuki, Yasutake Ohishi

IEEE PHOTONICS JOURNAL 5 ( 4 ) 2202206 2013.8 （ ISSN:1943-0655 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

Dynamic bandgap control in all-solid chalcogenide-tellurite photonic bandgap fiber (PBGF) by the refractive index changes due to the optical Kerr effect is numerically simulated in this paper. The core and the cladding with low index are designed by the tellurite glass TeO2-ZnO-Li2O-Bi2O3, whereas the high-index rods are designed by the chalcogenide glass GeGaSbS. Because all-solid chalcogenide-tellurite PBGF has higher nonlinear refractive index than the conventional silica PBGF, when the high peak power transmits in this fiber, the refractive index will change due to the optical Kerr effect, and so will the bandgap.

DOI： 10.1109/JPHOT.2013.2271714
LOCAL FIELD EFFECT ON Nd³⁺-DOPED α-NaYF₄ NANOCRYSTALS IN LIQUIDS. Reviewed

Xiaojie Xue*, Takenobu Suzuki, Yasutake Ohishi

2013 International Conference on Optical MEMS and Nanophotonics (OMN) 151 - 152 2013.8

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Optical parametric gain and bandwidth in highly nonlinear tellurite hybrid microstructured optical fiber with four zero-dispersion wavelengths Reviewed

Tong Hoang Tuan, Tonglei Cheng, Koji Asano, Zhongchao Duan, Weiqing Gao, Dinghuan Deng, Takenobu Suzuki, Yasutake Ohishi

OPTICS EXPRESS 21 ( 17 ) 20303 - 20312 2013.8 （ ISSN:1094-4087 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：OPTICAL SOC AMER

The parametric amplification gain and bandwidth in highly nonlinear tellurite hybrid microstructured optical fiber (HMOF) are simulated based on four wave mixing process. The fiber core and cladding materials are made of TeO2-Li2O-WO3-MoO3-Nb2O5 and TeO2-ZnO-Na2O-P2O5 glass, respectively. The fiber has four zero-dispersion wavelengths and the chromatic dispersion is flattened near the zero-dispersion wavelengths. A broad gain bandwidth as wide as 1200 nm from 1290 to 2490 nm can be realized in the near infrared window by using a tellurite HMOF as short as 25 cm.

DOI： 10.1364/OE.21.020303
Third-harmonic generation in an elliptical-core ZBLAN fluoride fiber. Reviewed

Weiqing Gao, Kazuhiko Ogawa, Xiaojie Xue, Meisong Liao, Dinghuan Deng, Tonglei Cheng, Takenobu Suzuki, Yasutake Ohishi

Optics letters 38 ( 14 ) 2566 - 2568 2013.7

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We demonstrate third-harmonic generation (THG) in an elliptical-core ZrF4-BaF2-LaF3-AlF3-NaF (ZBLAN) fluoride fiber, for the first time to our best knowledge. Linearly polarized THG around 523 nm is obtained when pumped by a pulse laser at 1560 nm. The extinction ratios of average power and peak power are ~6.7 and ~6.8 dB, respectively, in a 10 m long fiber. The extinction ratios are improved to ~11.1 and ~12.6 dB, respectively, when the fiber length is cut to 35 cm. Tunable THG from 605 to 740 nm is observed when pumped by an optical parametric oscillator with the pump wavelength changed from 1800 to 2200 nm.

DOI： 10.1364/OL.38.002566
Raman comb lasing in a ring cavity with high-birefringence fiber loop mirror. Reviewed

ガオウェイチン, Meisong Liao*, ディンハン　デン, トンレイ　チャン, Takenobu Suzuki, Yasutake Ohishi

Optics Communications 300 225 - 229 2013.7

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Size-dependent upconversion luminescence and quenching mechanism of LiYF₄:Er³⁺/Yb³⁺ nanocrystals with oleate ligand adsorbed. Reviewed

Xiaojie Xue*, Shinya Uechi*, ラジャニシュ　ティワリ, ゾオンチャオ　デュアン, Meisong Liao*, 吉村　雅満, Takenobu Suzuki, Yasutake Ohishi

Optical Materials Express 3 ( 7 ) 989 - 999 2013.7

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Optical Parametric Gain of Tellurite/Phosphate Highly Nonlinear Optical Fiber. Reviewed

エドモンド　サミュエル, Tong Hoang Tuan*, Koji Asano*, Takenobu Suzuki, Yasutake Ohishi

ICETE 2013 - 10th Int. Joint Conf. on E-Business and Telecommunications; 4th Int. Conf. DCNET 2013, - 10th Int. Conf. on ICE-B 2013 and OPTICS 2013 - 4th Int. Conf. on Optical Communication Systems 407 - 411 2013.7

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A Simple Tellurite Photonic Bandgap Fiber Based on One Array of Rings. Reviewed

トンレイ　チャン, ゾオンチャオ　デュアン, Meisong Liao*, ガオウェイチン, ディンハン　デン, Takenobu Suzuki, Yasutake Ohishi

Technical Digest (USB) WPA - 20 2013.7

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Dynamic Lightwave Propagation Control in Tellurite All Solid Photonic Bandgap Fibers. Reviewed

Yukiko Sakai*, トンレイ　チャン, Hiroyasu Kawashima*, Takenobu Suzuki, Yasutake Ohishi

Technical Digest (USB) WPA - 21 2013.7

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Size-dependent Upconversion Luminescence in Er³⁺ /Yb³⁺ Codoped LiYF₄ Nano/Microcrystals. Reviewed

Xiaojie Xue*, Shinya Uechi*, ラジャニシュ　ティワリ, ゾオンチャオ　デュアン, Meisong Liao*, 吉村　雅満, Takenobu Suzuki, Yasutake Ohishi

Technical Digest (USB) Tupl - 28 2013.7

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太陽光励起ガラスレーザ媒質の高効率化 Reviewed

鈴木　健伸, 水野真太郎豊田中央研究所*, 伊藤博豊田中央研究所*, 長谷川和男豊田中央研究所*, 大石　泰丈

レーザー学会　第445回研究会報告 1 - 6 2013.7

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Authorship：Lead author Publishing type：Research paper (scientific journal)
Dynamic Bandgap Control in All-solid Tellurite Photonic Bandgap Fibers. Reviewed

トンレイ　チャン, Yukiko Sakai*, Hiroyuki Kawashima*, Takenobu Suzuki, Yasutake Ohishi

Nonlinear Optics Technical Digest (c)OSA 2013 NW4A.03 2013.7

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Mid-infrared supercontinuum generation in suspended-core Chalcogenide and　Tellurite optical fibers. Reviewed

I. Savelii Universite de Bourgogne*, J. Fatome Universite de Bourgogne*, B. Kibler Universite de Bourgogne*, H. Kawashima*, ガオウェイチン, T. Kohoutek*, Takenobu Suzuki, Yasutake Ohishi, F. Smektala Universite de Bourgogne*, 他5名*

Nonlinear Optics Technical Digest (c) OSA 2013 NF1A.4 2013.7

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Dynamic Control in All-solid Soft-glass Photonic Bandgap Fibers. Reviewed

トンレイ　チャン, Yukiko Sakai*, Hiroyasu Kawashima*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of 6th IEEE/International Conference on Advanced Infocomm Technology SU - B 2013.7

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Supercontinuum Generation Approaching the Whole Transparent Range of Glass. Reviewed

Meisong Liao*, Yasutake Ohishi, トンレイ　チャン, ガオウェイチン, Xiaojie Xue*, ゾオンチャオ　デュアン, ディンハン　デン, Hiroyasu Kawashima*, Takenobu Suzuki

Proceedings of 6th IEEE / International Conference on Advanced Infocomm Technology SU - D 2013.7

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Size-dependent upconversion luminescence and quenching mechanism of LiYF4: Er3+/Yb3+ nanocrystals with oleate ligand adsorbed Reviewed

Xiaojie Xue, Shinya Uechi, Rajanish N. Tiwari, Zhongchao Duan, Meisong Liao, Masamichi Yoshimura, Takenobu Suzuki, Yasutake Ohishi

OPTICAL MATERIALS EXPRESS 3 ( 7 ) 2013.7 （ ISSN:2159-3930 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：OPTICAL SOC AMER

Er3+/Yb3+ co-doped LiYF4 nanocrystals were prepared by a facile solvothermal method. By adjusting the LiOH concentration, LiYF4 crystals with the size range from 16 nm to 2.0 mu m were synthesized. Under the excitation by a 976 nm laser, upconversion quantum efficiency of the LiYF4: Er3+/Yb3+ samples were measured. It was observed that upconversion quantum efficiency tended to decrease with the reduction of particle size from microscale to nanoscale. A model was proposed to clarify the surface quenching mechanism influencing the size-dependent upconversion luminescence. (C) 2013 Optical Society of America

DOI： 10.1364/OME.3.000989
A Novel Seven-Core Multicore Tellurite Fiber. Reviewed

トンレイ　チャン, ゾオンチャオ　デュアン, ガオウェイチン, Koji Asano*, Meisong Liao*, ディンハン　デン, Takenobu Suzuki, Yasutake Ohishi

Journal of Lightwave Technology 31 ( 11 ) 1793 - 2013 2013.6

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Supercontinuum generation from a multiple-ring-holes tellurite microstructured optical fiber pumped by a 2 μm mode-locked picosecond fiber laser Reviewed

Dinghuan Deng, Weiqing Gao, Meisong Liao, Zhongchao Duan, Tonglei Cheng, Takenobu Suzuki, Yasutake Ohishi

Applied Optics 52 ( 16 ) 3818 - 3823 2013.6 （ ISSN:1539-4522 eISSN:1539-4522 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：OSA - The Optical Society

Supercontinuum (SC) generation from a highly nonlinear tellurite microstructured optical fiber with multiple rings of holes was demonstrated by pumping with a 2 μm mode-locked picosecond fiber laser. The chromatic dispersion of the fiber was measured with a homemade white-light spectral interferometer in a wide wavelength range and agreed with the theoretical calculation. Although the pumped wavelength was far from the zero dispersion wavelength, with flat dispersion profile of the fiber in the anomalous dispersion, the SC could be expanded from 650 to 2850 nm with launched pulse energy of several hundred picojoules. Simulations of SC generation agreed with the experimental results. © 2013 Optical Society of America.

DOI： 10.1364/AO.52.003818
400-Wavelength Raman Comb Lasing in a Ring Cavity Based on Nonlinear Polarization Rotation. Reviewed

ガオウェイチン, Meisong Liao*, ディンハン　デン, トンレイ　チャン, Takenobu Suzuki, Yasutake Ohishi

CLEO:2013 Technical Digest(c)OSA 2013 JTu4A.04 2013.6

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All-solid tellurite microstructured optical fiber with one layer of hi-index rods. Reviewed

トンレイ　チャン, ゾオンチャオ　デュアン, ガオウェイチン, Meisong Liao*, ディンハン　デン, Takenobu Suzuki, Yasutake Ohishi

CLEO:2013 Technical Digest(c)OSA 2013 JTu4A.23 2013.6

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A novel design of cluster-small-core tellurite microstructured optical fiber Reviewed

Tonglei Cheng, Lu Chai, Meisong Liao, Weiqing Gao, Zhongchao Duan, Takenobu Suzuki, Chingyue Wang, Yasutake Ohishi

OPTICS COMMUNICATIONS 294 172 - 178 2013.5 （ ISSN:0030-4018 eISSN:1873-0310 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

A novel cluster-small-core tellurite microstructured optical fiber (MOF) which possesses high nonlinearity and supports high-power transmission in the small core is presented in the paper. When the light is coupled to the input end of this MOF, a large effective mode area can be obtained. At the odd times of coupling length, the light will be coupled to the central single core and the intensity in central single core will increase by nearly 7-fold. Therefore, the MOF not only has the same nonlinearity coefficient with the central single core, but also can support high-power beam transmission. It effectively decreases the likelihood of breaking the input end of single-core MOF when directly pumped with high-power beam. (C) 2012 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.optcom.2012.12.045
Mid-Infrared Supercontinuum Generation in a 1.3cm As₂S₃ Fiber with Suspended-Core Structure. Reviewed

ガオウェイチン, Mohammed El Amraoui Universite Laval*, Meisong LIao*, Hiroyasu Kawashima*, ゾオンチャオ　デュアン, ディンハン　デン, トンレイ　チャン, Takenobu Suzuki, Younes Messaddeq Universite Laval*, Yasutake Ohishi

2013 Conference on Lasers and Electro-Optics Europe and International Quantum Electronics Conference 2013.5

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Er³⁺-doped LiYF₄-Polymer Nanocomposites for S+C+L Band Amplification. Reviewed

Xiaojie Xue*, Shinya Uechi*, ガオウェイチン, Takenobu Suzuki, Yasutake Ohishi

Proceedigns CE - P.5 2013.5

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Compositional and structural dependence of chromatic dispersion in tellurite hybrid microstructured optical fibers. Reviewed

ゾオンチャオ　デュアン, Hoangtuan Tong*, Meisong Liao*, ディンハン　デン, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 8775 87750W - 1 2013.5

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Publishing type：Research paper (international conference proceedings)
Brillouin gain spectra in all-solid chalcogenide-tellurite photonic bandgap fiber. Reviewed

トンレイ　チャン, Meisong Liao*, ガオウェイチン, ゾオンチャオ　デュアン, ディンハン　デン, Takenobu Suzuki, Yasutake Ohishi

2013 Conference on Lasers and Electro-Optics - International Quantum Electronics Conference CD - P3 2013.5

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A. novel seven-core multicore tellurite fiber. Reviewed

トンレイ　チャン, ゾオンチャオ　デュアン, Meisong Liao*, ガオウェイチン, ディンハン　デン, Takenobu Suzuki, Yasutake Ohishi

2013 Conference on Lasers & Electro-Optics Europe & International Quantum Electronics Conference CLEO EUROPE/IQEC CJ - P.41 2013.5

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Highly Nonlinear Tellurite Fiber with Engineered Chromatic Dispersion for Broadband Optical Parametric Amplification. Reviewed

エドモンド　サミュエル, Tong Hoang Tuan*, Koji Asano*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 8772 87721C - 1 2013.5

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Mid-infrared supercontinuum generation in suspended-core Chalcogenide and Tellurite optical fibers. Reviewed

I. Sabelli Universite de Bourgogne*, O. Mouawad Universite de Bourgogne*, J. Fatome Universite de Bourgogne*, B. Kibler Universite de Bourgogne*, C. Finot Universite de Bourgogne*, ガオウェイチン, Takenobu Suzuki, Yasutake Ohishi, F. Smektala Universite de Bourgogne*, 他6名*

Advance Programme 2013.5

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Mid-Infrared Supercontinuum Generation in a 1.3 cm As₂S₃ Fiber with Suspended-Core Structure. Reviewed

ガオウェイチン, Mohammed El Amraoui Université Laval*, Meisong Liao*, Hiroyasu Kawashima*, ゾオンチャオ　デュアン, ディンハン　デン, トンレイ　チャン, Takenobu Suzuki, Younès Messaddeq Université Laval*, Yasutake Ohishi

2013 Conference on Lasers & Electro-Optics Europe & International Quantum Electronics Conference CLEO EUROPE/IQEC CD.P.4 2013.5

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Mid-infrared supercontinuum generation in a suspended-core As₂S₃ chalcogenide microstructured optical fiber. Reviewed

ガオウェイチン, Mohammed El Amraoui Universite Laval*, Meisong Liao*, Hiroyasu Kawashima*, ゾオンチャオ　デュアン, ディンハン　デン, トンレイ　チャン, Takenobu Suzuki, Younes Messaddeq Universite Laval*, Yasutake Ohishi

Optics Express 21 ( 8 ) 9573 - 9583 2013.4

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Compositional and structural dependence of chromatic dispersion in tellurite hybrid microstructured optical fibers. Reviewed

ゾオンチャオ　デュアン, Hoangtuan Tong*, Meisong Liao*, ディンハン　デン, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 8775 87750W - 1 2013.4

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On the analogy between photoluminescence and carrier-type reversal in Bi- and Pb-doped glasses Reviewed

Mark A. Hughes, Russell M. Gwilliam, Kevin Homewood, Behrad Gholipour, Daniel W. Hewak, Tae-Hoon Lee, Stephen R. Elliott, Takenobu Suzuki, Yasutake Ohishi, Tomas Kohoutek, Richard J. Curry

OPTICS EXPRESS 21 ( 7 ) 8101 - 8115 2013.4 （ ISSN:1094-4087 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：OPTICAL SOC AMER

Reaction order in Bi-doped oxide glasses depends on the optical basicity of the glass host. Red and NIR photoluminescence (PL) bands result from Bi2+ and Bi-n clusters, respectively. Very similar centers are present in Bi- and Pb-doped oxide and chalcogenide glasses. Bi-implanted and Bi melt-doped chalcogenide glasses display new PL bands, indicating that new Bi centers are formed. Bi-related PL bands have been observed in glasses with very similar compositions to those in which carrier-type reversal has been observed, indicating that these phenomena are related to the same Bi centers, which we suggest are interstitial Bi2+ and Bi clusters. (c) 2013 Optical Society of America

DOI： 10.1364/OE.21.008101
Highly Nonlinear Tellurite Fiber with Engineered Chromatic Dispersion for Broadband Optical Parametric Amplification. Reviewed

エドモンド　サミュエル, Tong Hoang Tuan*, Koji Asano*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 8772 87721C - 1 2013.4

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Mid-infrared supercontinuum generation in a suspended-core As2S3 chalcogenide microstructured optical fiber Reviewed

Weiqing Gao, Mohammed El Amraoui, Meisong Liao, Hiroyasu Kawashima, Zhongchao Duan, Dinghuan Deng, Tonglei Cheng, Takenobu Suzuki, Younes Messaddeq, Yasutake Ohishi

OPTICS EXPRESS 21 ( 8 ) 9573 - 9583 2013.4 （ ISSN:1094-4087 ）

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We demonstrate the supercontinuum (SC) generation in a suspended-core As2S3 chalcogenide microstructured optical fiber (MOF). The variation of SC is investigated by changing the fiber length, pump peak power and pump wavelength. In the case of long fibers (20 and 40 cm), the SC ranges are discontinuous and stop at the wavelengths shorter than 3500 nm, due to the absorption of fiber. In the case of short fibers (1.3 and 2.4 cm), the SC ranges are continuous and can extend to the wavelengths longer than 4 mu m. The SC broadening is observed when the pump peak power increases from 0.24 to 1.32 kW at 2500 nm. The SC range increases with the pump wavelength changing from 2200 to 2600 nm, corresponding to the dispersion of As2S3 MOF from the normal to anomalous region. The SC generation is simulated by the generalized nonlinear Schrodinger equation. The simulation includes the SC difference between 1.3 and 2.4 cm long fiber by 2500 nm pumping, the variation of SC with pump peak power in 2.4 cm long fiber, and the variation of SC with pump wavelength in 1.3 cm long fiber. The simulation agrees well with the experiment. (C) 2013 Optical Society of America

DOI： 10.1364/OE.21.009573
Dark-Square-Pulse Generation in a Ring Cavity With a Tellurite Single-Mode Fiber. Reviewed

ガオウェイチン, メイソン　リャオ, Hiroyasu Kawashima*, Takenobu Suzuki, Yasutake Ohishi

IEEE Photonics Technology Letters 25 ( 6 ) 546 - 549 2013.3

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Five-Octave-Spanning Supercontinuum gGeneration in Fluoride Glass. Reviewed

メイソン　リャオ, ガオウェイチン, トンレイ　チャン, Xiaojie Xue*, ゾオンチャオ　デュアン, ディンハン　デン, Hiroyasu Kawashima*, Takenobu Suzuki, Yasutake Ohishi

Applied Physics Express 6 ( 3 ) 032503 - 1 2013.3

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太陽光誘起による光ファイバからのレーザー発振 Reviewed

水野真太郎豊田中央研究所*, 長谷川和男豊田中央研究所*, 伊藤博豊田中央研究所*, 鈴木　健伸, 大石　泰丈

NEW GLASS 28 ( 108 ) 34 - 38 2013.3

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Five-Octave-Spanning Supercontinuum Generation in Fluoride Glass Reviewed

Meisong Liao, Weiqing Gao, Tonglei Cheng, Xiaojie Xue, Zhongchao Duan, Dinghuan Deng, Hiroyasu Kawashima, Takenobu Suzuki, Yasutake Ohishi

APPLIED PHYSICS EXPRESS 6 ( 3 ) 2013.3 （ ISSN:1882-0778 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：JAPAN SOC APPLIED PHYSICS

An ultra-broadband supercontinuum (SC) covering 0.2-8.0 mu m which is more than 5 octaves, is demonstrated in a piece of fluoride glass. The 20 dB bandwidth spans from 0.39 to 7.4 mu m. The filaments, bright conic visible emission, and interference fringe pattern are observed. The glass thickness, optical path, and pump conditions are optimized to enable the SC to cover the entire transmission range of the glass, which includes the whole functional group region of chemical bands and groups. The SC conversion efficiency is confirmed to be stable. (C) 2013 The Japan Society of Applied Physics

DOI： 10.7567/APEX.6.032503
Ultrabroad supercontinuum generation through filamentation in tellurite glass Reviewed

Meisong Liao, Weiqing Gao, Tonglei Cheng, Zhongchao Duan, Xiaojie Xue, Hiroyasu Kawashima, Takenobu Suzuki, Yasutake Ohishi

LASER PHYSICS LETTERS 10 ( 3 ) 2013.3 （ ISSN:1612-2011 eISSN:1612-202X ）

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Although soft glass such as tellurite or chalcogenide glass is transparent in the range of 3-6 mu m, fiber made of it is difficult to generate as a supercontinuum (SC) to that range because of the high loss, the wavelength limit of the pump source, and the challenges in light-coupling. To circumvent these problems, we developed an SC light source by using tellurite bulk glass through filamentation. For this scheme, the optical path length in the glass is very short due to the adopted high pump power, so the negative influence of material loss is reduced greatly. The light-coupling is straightforward, and the coupling efficiency is high. The bulk glass for SC generation is cheap, and can be fabricated easily. We have shown that under suitable pump conditions, the SC generation by filamentation can cover from visible to 6 mu m. It is the broadest SC generation by tellurite (including glass and fiber). For suitable pump conditions, the glass was free of optical breakdown. If the interface reflections were deducted, the SC conversion efficiency was 87%; the SC conversion efficiency was stable. To the best of our knowledge, this is the first report on filamentation in tellurite glass which has a comparatively small bandgap.

DOI： 10.1088/1612-2011/10/3/036002
A simple all-solid tellurite microstructured optical fiber. Reviewed

トンレイ　チャン, ゾオンチャオ　デュアン, メイソン　リャオ, ガオウェイチン, ディンハン　デン, Takenobu Suzuki, Yasutake Ohishi

Optics Express 21 ( 3 ) 3318 - 3323 2013.2

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A simple all-solid tellurite microstructured optical fiber. Reviewed

トンレイ　チャン, ゾオンチャオ　デュアン, メイソン　リャオ, ガオウェイチン, ディンハン　デン, Takenobu Suzuki, Yasutake Ohishi

Optics Express 21 ( 3 ) 3318 - 3323 2013.2

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A simple all-solid tellurite microstructured optical fiber. Reviewed

トンレイ　チャン, ゾオンチャオ　デュアン, メイソン　リャオ, ガオウェイチン, ディンハン　デン, Takenobu Suzuki, Yasutake Ohishi

Optics Express 21 ( 3 ) 3318 - 3323 2013.2

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Filamentation and supercontinuum generation in tellurite glass. Reviewed

メイソン　リャオ, ガオウェイチン, トンレイ　チャン, ゾオンチャオ　デュアン, Xiaojie Xue*, Hiroyasu Kawashima*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 8621 862110 - 1 2013.2

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Square-pulse operation in a ring cavity with a single-mode tellurite fiber. Reviewed

ガオウェイチン, メイソン　リャオ, Hiroyasu Kawashima*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 8621 862113 - 1 2013.2

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Parametric gain analysis in tellurite/phospho-tellurite hybrid microstructured optical fibers with an engineered chromatic dispersion. Reviewed

エドモンド　サミュエル, Tong Hoang Tuan*, メイソン　リャオ, ゾオンチャオ　デュアン, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 8604 860418 - 1 2013.2

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Supercontinuum generation from a multi-ring holes tellurite microstructure fiber pumped with a 2-micron high-power mode-locked fiber laser. Reviewed

ディンハン　デン, ガオウェイチン, メイソン　リャオ, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 8621 862111 - 1 2013.2

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Analysis of soliton self-frequency shift in ZBLAN fiber as a broadband supercontinuum medium. Reviewed

Xin Yan*, メイソン　リャオ, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 8621 862112 - 1 2013.2

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All-solid tellurite-phosphate photonic bandgap fiber. Reviewed

トンレイ　チャン, メイソン　リャオ, H. T. Tong*, ガオウェイチン, ゾオンチャオ　デュアン, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 8621 862114 - 1 2013.2

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A novel tellurite-phosphate glass for hybrid microstructured optical fibers. Reviewed

ゾオンチャオ　デュアン, H. Tong*, メイソン　リャオ, M. Erwan*, Koji Asano*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 8621 86211 E - 1 2013.2

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Optical characterization of Er-doped glasses for solar-pumped laser applications. Reviewed

Takenobu Suzuki, Yasuyuki Iwata*, Kohei Nogata*, Shintaro Mizuno Toyota Central R&D Labs., Inc.*, Hiroshi Ito Toyota Central R&D Labs., Inc.*, Kazuo Hasegawa Toyota Central R&D Labs., Inc.*, Yasutake Ohishi

Proceedings of SPIE 8621 86211 G - 1 2013.2

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高非線形微細構造光ファイバによるコヒーレント光発生 Reviewed

大石　泰丈, メイソン　リャオ, ガオウェイチン, Xin Yan*, 鈴木　健伸

The 23rd Meeting on Glasses for Photonics 講演予稿集 11 - 12 2013.1

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Ultrabroad supercontinuum generation through flamentation in tellurite glass. Reviewed

メイソン　リャオ, ガオウェイチン, トンレイ　チャン, ゾオンチャオ　デュアン, Xiaojie Xue*, Hiroyasu Kawashima*, Takenobu Suzuki, Yasutake Ohishi

Laser Physics Letters 10 ( 3 ) 036002 - 1 2013.1

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Tunable Brillouin-Erbium Comb Fiber Laser in a Linear Cavity With a Single-Mode Tellurite Fiber. Reviewed

ガオウェイチン, メイソン　リャオ, トンレイ　チャン, Takenobu Suzuki, Yasutake Ohishi

IEEE Photonics Technology Letters 25 ( 1 ) 51 - 54 2013.1

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Nd添加フッ化物ファイバの太陽光励起発振 Reviewed

鈴木　健伸, 水野真太郎豊田中央研究所*, 伊藤博豊田中央研究所*, 長谷川和男豊田中央研究所*, 大石　泰丈

レーザー学会学術講演会第33回年次大会講演予稿集 S730aIX05 2013.1

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高効率太陽光励起レーザーの開発 Reviewed

長谷川和男豊田中央研究所*, 水野真太郎豊田中央研究所*, 伊藤博豊田中央研究所*, 市川正豊田中央研究所*, 鈴木　健伸, 大石　泰丈

レーザー学会学術講演会第33回年次大会講演予稿集 S730aIX04 2013.1

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Er3+-doped LiYF4-Polymer Nanocomposites for S plus C plus L Band Amplification Reviewed

Xiaojie Xue, Shinya Uechi, Weiqing Gao, Takenobu Suzuki, Yasutake Ohishi

2013 CONFERENCE ON AND INTERNATIONAL QUANTUM ELECTRONICS CONFERENCE LASERS AND ELECTRO-OPTICS EUROPE (CLEO EUROPE/IQEC) 2013

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Local field effect on Nd3+-doped α-NaYF4 nanocrystals in liquids Reviewed

Xiaojie Xue, Takenobu Suzuki, Yasutake Ohishi

International Conference on Optical MEMS and Nanophotonics 151 - 152 2013 （ ISBN:9781479915125 ISSN:2160-5033 eISSN:2160-5041 ）

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The oleate-capped α-NaYF4:Nd3+ nanocrystals (NCs) were synthesized via solvothermal method. By a ligand exchange method, the oleate-capped NCs could be changed to citrate-capped samples which can be dispersed in polar solvents. By the relation between the measured emission lifetime and effective refractive indices of the composites containing NCs, the local field effect was investigated. It was found that the preferable model would change from the real cavity model to virtual cavity model when the particle size reduced to 6 nm in nonpolar solvent system, but the preferable model kept being real cavity model in polar solvent system. © 2013 IEEE.

DOI： 10.1109/OMN.2013.6659104
All-solid tellurite microstructured optical fiber with one layer of high-index rods Reviewed

Tonglei Cheng, Zhongchao Duan, Weiqing Gao, Meisong Liao, Dinghuan Deng, Takenobu Suzuki, Yasutake Ohishi

2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) 2013 （ ISSN:2160-9020 ）

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A simple all-solid tellurite microstructured optical fiber which has only one layer of high-index rods is proposed and fabricated. The core and cladding are made from the TeO2-ZnO-Na2O-La2O3 glass, and the high-index rods are made from the TeO2-Li2O-WO3-MoO3-Nb2O5 glass.
Size-dependent Upconversion Luminescence in Er3+/Yb3+ Codoped LiYF4 Nano/Microcrystals Reviewed

Xiaojie Xue, Shinya Uechi, Rajanish N. Tiwari, Zhongchao Duan, Meisong Liao, Masamichi Yoshimura, Takenobu Suzuki, Yasutake Ohishi

2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS PACIFIC RIM (CLEO-PR) 2013

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Er3+/Yb3+ codoped LiYF4 nano/microcrystals were controllable synthesized via a facile solvothermal method. Based on the emission spectra and quantum efficiencies under 976 nm pumping, size-dependent upconversion luminescence was studied.
Optical Parametric Gain of Tellutire/Phosphate Highly Nonlinear Optical Fiber Reviewed

Edmund Samuel, Tong Hoang Tuan, Koji Asano, Takenobu Suzuki, Yasutake Ohishi

PROCEEDINGS OF THE 4TH INTERNATIONAL CONFERENCE ON OPTICAL COMMUNICATION SYSTEMS (OPTICS 2013) 407 - 411 2013

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We optimized the optical pump power to realize better phase-matching, higher parametric amplification gain and broader bandwidth for highly nonlinear optical fibers with tailored chromatic dispersions. The core-clad materials have large refractive index difference of 0.49. The gain bandwidth calculated are 108 and 104 nm for the step index and hybrid micorstructured optical fibers with two zero dispersion wavelengths respectively. The broadest bandwidth in our calculation is 108 nm for step index fiber at pump wavelength 1238 nm.
Size-dependent Luminescence of Nd3+-doped LiYF4 Nanocrystals Reviewed

Xiaojie Xue, Takenobu Suzuki, Rajanish N. Tiwari, Masamichi Yoshimura, Yasutake Ohishi

Frontiers in Optics 2013 2013

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DOI： 10.1364/fio.2013.ftu3a.19
Mid-infrared supercontinuum generation in a 1.3 cm As2S 3 fiber with suspended-core structure Reviewed

Weiqing Gao, Mohammed El Amraoui, Meisong Liao, Hiroyasu Kawashima, Zhongchao Duan, Dinghuan Deng, Tonglei Cheng, Takenobu Suzuki, Younes Messaddeq, Yasutake Ohishi

2013 Conference on Lasers and Electro-Optics Europe and International Quantum Electronics Conference, CLEO/Europe-IQEC 2013 2013

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Chalcogenide glass has great advantages because of their wide transmission window and high nonlinearity in the mid-infrared (MIR) region. Many works about supercontinuum (SC) generation in As-Se or As-S fibers have been demonstrated [1-2]. In this paper, we demonstrate the SC generation in a 1.3 cm suspended-core As2S3 microstructured optical fiber (MOF) experimentally. The SC range changed with different pump wavelengths from 2200 to 2600 nm, corresponding to the dispersion from the normal to anomalous region. The SCs could extend to longer than 4 μm with the pump wavelengths close to the zero-dispersion wavelength (ZDW). The SCs were simulated by the generalized nonlinear Schrödinger equation. © 2013 IEEE.

DOI： 10.1109/CLEOE-IQEC.2013.6800918
Supercontinuum generation from a multi-ring holes tellurite microstructured fiber pumped by a 2 micron high power mode-locked fiber laser Reviewed

Dinghuan Deng, Weiqing Gao, Meisong Liao, Takenobu Suzuki, Yasutake Ohishi

OPTICAL COMPONENTS AND MATERIALS X 8621 2013 （ ISSN:0277-786X ）

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Language：English Publishing type：Research paper (international conference proceedings) Publisher：SPIE-INT SOC OPTICAL ENGINEERING

Supercontinuum (SC) generation from a highly nonlinear tellurite microstructured fiber with multi-ring holes was demonstrated by pumping with a 2 mu m high power mode-locked fiber laser. The chromatic dispersion of the fiber was measured with a homemade white-light spectral interferometer on a wide wavelength range and matched very well with the theoretical calculation. The zero dispersion wavelength (ZDW) of the fiber was measured to be 1358 nm and calculated to be 1390 nm. Although the pumped wavelength was far away from ZDW, with flat dispersion profile of the fiber on the anomalous dispersion, the SC could be expanded from 650 nm to 2850 nm with launched pulse energy of several hundred picojoules. Simulations of SC generation were performed and showed fair agreement with the experimental results.

DOI： 10.1117/12.2003281
Suppression of stimulated Brillouin scattering in all-solid chalcogenide-tellurite photonic bandgap fiber. Reviewed

トンレイ　チャン, メイソン　リャオ, ガオウェイチン, ゾオンチャオ　デュアン, Takenobu Suzuki, Yasutake Ohishi

Optics Express 20 ( 27 ) 28846 - 28854 2012.12

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Defect core tellurite/phosphate composite microstructured optical fiber with four zero dispersion wavelengths. Reviewed

Xin Yan*, メイソン　リャオ, Tong Hoang Tuan*, Takenobu Suzuki, Yasutake Ohishi

Optics Communications 291 341 - 344 2012.12

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Flat and broadband supercontinuum generation by four-wave mixing in a highly nonlinear tapered microstructured fiber. Reviewed

メイソン　リャオ, ガオウェイチン, トンレイ　チャン, ゾオンチャオ　デュアン, Xiaojie Xue*, Takenobu Suzuki, Yasutake Ohishi

Optics Express 20 ( 26 ) B574 - B580 2012.12

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エルビウム添加ガラスを用いた太陽光ファイバレーザ発振可能性 Reviewed

岩田靖之*, 野形康平*, 鈴木　健伸, 大石　泰丈

平成24年度日本セラミックス協会東海支部学術研究発表会　講演要旨集 53 2012.12

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100-Nanosecond-Level Square-Pulse Generation in a Ring Cavity with a Tellurite Single-Mode Fiber Reviewed

Weiqing Gao, Meisong Liao, Hiroyasu Kawashima, Tonglei Cheng, Takenobu Suzuki, Yasutake Ohishi

JAPANESE JOURNAL OF APPLIED PHYSICS 51 ( 12 ) 122702 - 1 2012.12 （ ISSN:0021-4922 eISSN:1347-4065 ）

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We demonstrate the square-pulse generation in a ring cavity with a 207 m tellurite single-mode fiber. The stable square pulse with the wide full width at half maximum (FWHM) of 118 ns is formed by the nonlinear polarization switching in the cavity. The high nonlinearity and birefringence of the tellurite fiber play the key role during the square-pulse formation and the net normal dispersion is advantageous for stabilizing the square pulse. When the linear phase delay bias is set close to the polarization switching point, the third-order harmonic pulses and multiple packets are observed under different pump powers. (C) 2012 The Japan Society of Applied Physics

DOI： 10.1143/JJAP.51.122702
水熱法により作製した希土類添加LiYF4ナノ粒子の粒径制御と発光特性の評価 Reviewed

上地慎也*, Xiaojie Xue*, 鈴木　健伸, 大石　泰丈

平成24年度日本セラミックス協会東海支部学術研究発表会　講演要旨集 15 2012.12

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高非線形カルコゲナイド光ファイバの構造設計および波長分散特性評価 Reviewed

川島浩靖*, 浅野晃司*, 鈴木　健伸, 大石　泰丈

平成24年度日本セラミックス協会東海支部学術研究発表会　講演要旨集 49 2012.12

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Nd³⁺添加リン酸塩ガラスを用いた太陽光励起ファイバレーザの実現性 Reviewed

野形康平*, 鈴木　健伸, 大石　泰丈

平成24年度日本セラミックス協会東海支部学術研究発表会　講演要旨集 54 2012.12

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Cr:MgGa₂O₄単結晶のフローティングゾーン法による作製と光学特性 Reviewed

荒川達哉*, 鈴木　健伸, 大石　泰丈

平成24年度日本セラミックス協会東海支部学術研究発表会　講演要旨集 56 2012.12

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Tm³⁺添加テルライトガラスのOH基の除去 Reviewed

押野和馬*, メイソン　リャオ, Takenobu Suzuki, 大石　泰丈

平成24年度日本セラミックス協会東海支部学術研究発表会　講演要旨集 51 2012.12

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Publishing type：Research paper (international conference proceedings)
スーパーコンティニューム光発生におけるテルライト微細構造光ファイバのテーパー形状依存性 Reviewed

宇崎良*, メイソン　リャオ, トンレイ　チャン, 鈴木　健伸, 大石　泰丈

平成24年度日本セラミックス協会東海支部学術研究発表会　講演要旨集 57 2012.12

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高非線形テルライトハイブリッド微細構造光ファイバによる広帯域光波制御 Reviewed

浅野晃司*, Tong Hoang Tuan*, ゾオンチャオ　デュアン, 鈴木　健伸, 大石　泰丈

平成24年度日本セラミックス協会東海支部学術研究発表会　講演要旨集 52 2012.12

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Investigation of local field effect of α-NaYF₄:Nd³⁺ nanocrystals. Reviewed

Xiaojie Xue*, Takenobu Suzuki, Hoang Tuan Tong*, Yasutake Ohishi

Physica Status Solidi C 9 ( 12 ) 2481 - 2484 2012.11

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Mid-infrared 2000-nm bandwidth supercontinuum generation in suspended-core microstructured Sulfide and Tellurite optical fibers. Reviewed

I. Savelli Laboratoire Interdisciplinaire Carnot de Bourgogne(ICB)*, O. Mouawad Laboratoire Interdisciplinaire Carnot de Bourgogne(ICB)*, J. Fatome Laboratoire Interdisciplinaire Carnot de Bourgogne(ICB)*, B. Kibler Laboratoire Interdisciplinaire Carnot de Bourgogne(ICB)*, ガオウェイチン, T. Kohoutek*, Takenobu Suzuki, Yasutake Ohishi, F. Smektala Laboratoire Interdisciplinaire Carnot de Bourgogne(ICB)*, 他5名*

Optics Express 20 ( 24 ) 27083 - 27093 2012.11

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Chalcogenide/tellurite hybrid microstructured optical fiber with high nonlinearity and flattened dispersion. Reviewed

Hiroyasu Kawashima*, Tomas Kohoutek*, Xin Yan*, Takenobu Suzuki, Yasutake Ohishi

Physica Status Solidi C 9 ( 12 ) 2621 - 2624 2012.11

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Optical properties of Er³⁺-doped glasses for solar-pumped lasers. Reviewed

Yasuyuki Iwata*, Takenobu Suzuki, Yasutake Ohishi

Physica Status Solidi C 9 ( 12 ) 2344 - 2347 2012.11

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Tellurite hybrid microstructured optical fibers with flattened dispersion at the telecom window. Reviewed

Koji Asano*, ゾオンチャオ　デュアン, Tong Hoang Tuan*, Takenobu Suzuki, Yasutake Ohishi

Physica Status Solidi C 9 ( 12 ) 2625 - 2628 2012.10

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Novel tellurite-phosphate composite microstructured optical fibers for highly nonlinear applications. Reviewed

Tong Hoang Tuan*, Koji Asano*, ゾオンチャオ　デュアン, メイソン　リャオ, Takenobu Suzuki, Yasutake Ohishi

Physica Status Solidi C 9 ( 12 ) 2598 - 2601 2012.10

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Luminescence Properties of α‑NaYF₄:Nd³⁺ Nanocrystals Dispersed in Liquid: Local Field Effect Investigation. Reviewed

Xiaojie Xue*, ゾオンチャオ　デュアン, Takenobu Suzuki, ラジャニシュ　ティワリ, 吉村　雅満, Yasutake Ohishi

The Journal of Physical Chemistry C 116 ( 42 ) 22545 - 22551 2012.10

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Tb³⁺ - Yb³⁺ 共添加ボロシリケートガラスのエネルギー移動 Reviewed

Takenobu Suzuki, 大石　泰丈

第53回ガラスおよびフォトニクス材料討論会講演要旨集 94 - 95 2012.10

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Direct laser writing of relief diffraction gratings into a bulk chalcogenide glass Reviewed

Tomas Kohoutek, Mark A. Hughes, Jiri Orava, Morio Mastumoto, Takashi Misumi, Hiroyasu Kawashima, Takenobu Suzuki, Yasutake Ohishi

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS 29 ( 10 ) 2779 - 2786 2012.10 （ ISSN:0740-3224 eISSN:1520-8540 ）

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We inscribed relief diffraction gratings with periods of 6, 14, and 24 mu m into the surface of Ge15Ga3Sb12S70 bulk glass by the material's ablation using a femtosecond lambda = 800 nm Ti:sapphire pulsed laser. The laser writing was done with sample implemented on a computer-controlled stage employing surface-to-beam alignment, laser power, and raster pattern control. Pulse energies of 1.5, 3.0, and 4.5 mu J were focused on spot diameter of 1.5 mu m, resulting in channel widths, measured on the surface, of around 4, 5, and 6 mu m and depths up to 1.7 mu m. The first-order diffraction efficiency of the fabricated gratings was up to 10% at lambda = 650 nm. We have also fabricated a "composite" grating combining the three relief diffraction gratings inscribed in the same position, but with a mutual tilt. The composite grating provides complex multidirectional diffraction of the light in accordance with geometrical arrangement and grating period of all the gratings inscribed. We propose practical applications of femtosecond pulsed-laser surface patterning, for example, surface-relief diffraction microgratings integrated at the ends of multimode mid-IR chalcogenide optical waveguides or on the surfaces of bare core chalcogenide glass optical fibers used for chemical sensing. (c) 2012 Optical Society of America
Enhancing Stimulated Brillouin Scattering in a Three-core Tellurite Microstructured Optical Fiber. Reviewed

トンレイ　チャン, Rim Cherif Engineering School of Communication of Tunis*, メイソン　リャオ, ガオウェイチン, ゾオンチャオ　デュアン, Mourad Zghal Engineering School of Communication of Tunis*, Takenobu Suzuki, Yasutake Ohishi

FiO/LS Technical Digest (c) OSA 2012 FTh3C.5 2012.10

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Broadband Supercontinuum Generation Through Filamentation in Tellurite Glass Pumped by Ultrashort Pulse. Reviewed

メイソン　リャオ, ガオウェイチン, トンレイ　チャン, ゾオンチャオ　デュアン, Hiroyuki Kawashima*, Takenobu Suzuki, Yasutake Ohishi

FiO/LS Technical Digest (c) OSA 2012 FTh2B.3 2012.10

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Tunable Brillouin-Erbium Fiber Laser using a Single-Mode Tellurite Fiber. Reviewed

ガオウェイチン, メイソン　リャオ, トンレイ　チャン, Takenobu Suzuki, Yasutake Ohishi

FiO/LS Technical Digest (c) OSA 2012 FW3A.38 2012.10

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先端フォトンテクノロジー研究センターの紹介 Reviewed

鈴木　健伸, 大石　泰丈

第53回ガラスおよびフォトニクス材料討論会講演要旨集 117 2012.10

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Nd添加太陽光励起ファイバレーザ用ガラス媒質の開発 Reviewed

鈴木　健伸, 大石　泰丈

第53回ガラスおよびフォトニクス材料討論会講演要旨集 12 - 13 2012.10

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Luminescence Properties of alpha-NaYF4:Nd3+ Nanocrystals Dispersed in Liquid: Local Field Effect Investigation Reviewed

Xiaojie Xue, Zhongchao Duan, Takenobu Suzuki, Rajanish N. Tiwari, Masamichi Yoshimura, Yasutake Ohishi

JOURNAL OF PHYSICAL CHEMISTRY C 116 ( 42 ) 22545 - 22551 2012.10 （ ISSN:1932-7447 eISSN:1932-7455 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：AMER CHEMICAL SOC

Pure alpha-NaYF4:Nd3+ nanocrystals of various sizes from 6 to 18 nm were successfully synthesized by a solvothermal method. By controlling the doping concentration of Nd3+ ions, alpha-NaYF4 nanocrystals with different quantum efficiencies were prepared. The monodispersed oleate-capped nanocrystals were dispersed in several nonpolar solvents to obtain stable colloids. Under the excitation by an 803 nm laser, luminescent decay curves of the colloids were measured. The relationship between the emission lifetimes of samples and the effective refractive indices of solvents was studied. The local field correction factor for the samples of 18 nm with different quantum efficiencies is expressed by the real cavity model which indicates the local field effect is independent of the emission quantum efficiency. When the particle size decreases to 6 nm, the preferred model alters from the real cavity model to the virtual cavity model which might be derived from changing of polarizability density.

DOI： 10.1021/jp305882j
Quantum-correlated photon pair generation in tellurite microstructured optical fibers. Reviewed

Xin Yan*, メイソン　リャオ, Tong Hoang Tuan*, Takenobu Suzuki, Yasutake Ohishi

Applied Physics B 109 ( 2 ) 277 - 282 2012.9 （ ISSN:0946-2171 ）

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Tunable hybrid Brillouin-erbium comb fiber laser in a composite cavity with a single-mode tellurite fiber. Reviewed

ガオウェイチン, メイソン　リャオ, トンレイ　チャン, Takenobu Suzuki, Yasutake Ohishi

Optics Letters 37 ( 18 ) 3786 - 3788 2012.9

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Stimulated Brillouin Scattering of Higher-Order Acoustic Modes in Four-Core Tellurite Microstructured Optical Fiber. Reviewed

トンレイ　チャン, Rim Cherif Engineering School of Communication of Tunis*, メイソン　リャオ, ガオウェイチン, ゾオンチャオ　デュアン, Mourad Zghal Engineering School of Communication of Tunis*, Takenobu Suzuki, Yasutake Ohishi

Applied Physics Express 5 102501 - 1 2012.9

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Realization of Fiber Lasing under Natural Sunlight Pumping. Reviewed

Shintaro Mizuno Toyota Central R&D Labs.*, Kazuo Hasegawa Toyota Central R&D Labs*, Hiroshi Ito Toyota Central R&D Labs*, Takenobu Suzuki, Yasutake Ohishi

R&D Review of Toyota CRDL. 43 ( 3 ) 61 - 68 2012.9

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Nd添加太陽光励起ファイバレーザの数値シュミレーション Reviewed

鈴木　健伸, 水野真太郎豊田中央研究所*, 伊藤博豊田中央研究所*, 長谷川和男豊田中央研究所*, 大石　泰丈

第73回応用物理学会学術講演会　講演予稿集 16 - 015 2012.9

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Low confinement loss hybrid-guiding tellurite photonic bandgap fiber. Reviewed

トンレイ　チャン, メイソン　リャオ, ガオウェイチン, ゾオンチャオ　デュアン, Takenobu Suzuki, Yasutake Ohishi

Optical Fiber Technology 18 498 - 501 2012.9

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Nd添加ガラスの太陽光励起レーザ媒質としての光学特性評価 Reviewed

鈴木　健伸, 水野真太郎豊田中央研究所*, 伊藤博豊田中央研究所*, 長谷川和男豊田中央研究所*, 大石　泰丈

第73回応用物理学会学術講演会　講演予稿集 16 - 014 2012.9

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平坦化分散テルライトハイブリッド微細構造光ファイバの非線形光学応用 Reviewed

浅野晃司*, T. H. Tuan*, ゾオンチャオ　デュアン, 鈴木　健伸, 大石　泰丈

日本セラミックス協会　第25回秋季シンポジウム講演予稿集 2PC05 2012.9

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エルビウム添加ガラスの太陽光励起ファイバレーザ媒体としての可能性 Reviewed

岩田靖之*, 野形康平*, 鈴木　健伸, 大石　泰丈

日本セラミックス協会　第25回秋季シンポジウム講演予稿集 2Ｐ36 2012.9

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テルライトテーパー微細構造光ファイバによるスーパーコンティニューム光発生特性 Reviewed

宇崎良*, メイソン　リャオ, トンレイ　チャン, 鈴木　健伸, 大石　泰丈

日本セラミックス協会　第25回秋季シンポジウム講演予稿集 2PC06 2012.9

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自然太陽光を励起源としたファイバレーザーの発振 Reviewed

水野真太郎豊田中央研究所*, 伊藤博豊田中央研究所*, 長谷川和男豊田中央研究所*, 鈴木　健伸, 大石　泰丈

第73回応用物理学会学術講演会　講演予稿集 16 - 013 2012.9

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Supercontinuum Generation in Picosecond Regime in a Highly Nonlinear Tapered Tellurite Microstructured Optical Fiber. Reviewed

メイソン　リャオ, ガオウェイチン, トンレイ　チャン, ゾオンチャオ　デュアン, Takenobu Suzuki, Yasutake Ohishi

ECOC Technical Digest (c)2012 OSA 1 - 7 2012.9

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Tellurite glass hollow-core photonic bandgap fiber. Reviewed

トンレイ　チャン, メイソン　リャオ, ガオウェイチン, ゾオンチャオ　デュアン, Takenobu Suzuki, Yasutake Ohishi

Europhysics Conference Abstract ( 36E ) 2012.8

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Supercontinuum Generation in a Tapered Tellurite Air-clad Fiber. Reviewed

メイソン　リャオ, ガオウェイチン, トンレイ　チャン, ゾオンチャオ　デュアン, Takenobu Suzuki, Yasutake Ohishi

Europhysics Conference Abstract 36E 2012.8

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Chalcogenide Core Tellurite Cladding Composite Microstructured Fiber for Nonlinear Applications. Reviewed

C. Chaudhari*, メイソン　リャオ, Takenobu Suzuki, Yasutake Ohishi

Journal of Lightwave Technology 30 ( 13 ) 2069 - 2076 2012.7

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A novel design of cluster-core highly non-linear tellurite microstructured optical fiber. Reviewed

トンレイ　チャン, メイソン　リャオ, ガオウェイチン, ゾオンチャオ　デュアン, Takenobu Suzuki, Yasutake Ohishi

Technical Digest 353 - 354 2012.7

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Third Harmonic Generation Measurement of Nonlinear Optical Susceptibility of Chalcogenide Ge-Ga-Sb-S Glasses. Reviewed

T. Kohoutek*, T. Misumi Furukawa Denshi Co., Ltd.*, M. Matsumoto Furukawa Denshi Co., Ltd.*, Takenobu Suzuki, Yasutake Ohishi

ISNOG 2012 238 2012.7

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Highly Efficient Diffraction Grating in Chalcogenide Ge-Ga-Sb-S Glass by Femtosecond Laser Writing. Reviewed

T. Kohoutek*, M. A. Hughes University of Surrey*, H. Kawashima*, T. Misumi Furukawa Denshi Co., Ltd.*, M. Matsumoto Furukawa Denshi Co., Ltd.*, Takenobu Suzuki, Yasutake Ohishi

Proc. of the International Symposium on Non Oxide Glasses and New Optical Glasses. 237 2012.7

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太陽光励起ファイバレーザー Reviewed

水野真太郎豊田中央研究所*, 長谷川和男豊田中央研究所*, 伊藤博豊田中央研究所*, 鈴木　健伸, 大石　泰丈

レーザー学会第427回研究会報告 7 - 12 2012.7

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Quasi-CW Supercontinuum Generation in a HNLF Pumped by Sub-Microsecond Pulse. Reviewed

ガオウェイチン, メイソン　リャオ, Xin Yan*, Takenobu Suzuki, Yasutake Ohishi

OECC 2012 Technical Digest 200 - 201 2012.7

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Fabrication of highly nonlinear optical fibers with tellurite glass core and phosphate glass cladding. Reviewed

H.T. Tong*, C. Kito*, Takenobu Suzuki, Yasutake Ohishi

Optical Materials 34 1795 - 1803 2012.6

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Switchable different operation states in an erbium-doped fiber laser cavity with normal dispersion. Reviewed

ガオウェイチン, メイソン　リャオ, Hiroyasu Kawashima*, Takenobu Suzuki, Yasutake Ohishi

Optics Communications 285 3809 - 3815 2012.6

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Supercontinuum generation in short tellurite microstructured fibers pumped by a quasi-cw laser. Reviewed

メイソン　リャオ, ガオウェイチン, ゾオンチャオ　デュアン, X. Yan*, Takenobu Suzuki, Yasutake Ohishi

Optics Letters 37 ( 11 ) 2127 - 2129 2012.6

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Investigation of Local Field Effect of α-NaYF₄: Nd³⁺ Nanocrystals Reviewed

Xiaojie Xue*, Takenobu Suzuki, Hoang Tuan Tong*, Yasutake Ohishi

ICOOPMA2012 Program and Abstracts 266 2012.6

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Low confinement loss of the tellurite hybrid-guiding photonic bandgap fiber. Reviewed

トンレイ　チャン, メイソン　リャオ, ガオウェイチン, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest JM5A.1 2012.6

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Novel tellurite-phosphate composite microstructured optical fibers for highly nonlinear applications. Reviewed

Tong Hoang Tuan*, Koji Asano*, ゾオンチャオ　デュアン, メイソン　リャオ, Takenobu Suzuki, Yasutake Ohishi

ICOOPMA2012 Program and Abstracts 99 2012.6

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Optical properties of Nd³⁺-doped phosphate glass for solar-pumped lasers. Reviewed

Kohei Nogata*, Takenobu Suzuki, Yasutake Ohishi

ICOOPMA2012 Program and Abstracts 146 2012.6

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Optical properties of Er³⁺-doped glasses for solar-pumped lasers. Reviewed

Yasuyuki Iwata*, Takenobu Suzuki, Yasutake Ohishi

ICOOPMA2012 Program and Abstracts 147 2012.6

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Chalcogenide/Tellurite Hybrid Microstructured Optical Fiber with High Nonlinearity and Flattened Dispersion. Reviewed

Hiroyasu Kawashima*, Tomas Kohoutek*, Xin Yan*, Takenobu Suzuki, Yasutake Ohishi

ICOOPMA2012 Program and Abstracts 165 2012.6

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Tellurite Hybrid Microstructured Optical Fibers with Flattened Dispersion at the Telecom Window. Reviewed

Koji Asano*, ゾオンチャオ　デュアン, Tong Hoang Tuan*, Takenobu Suzuki, Yasutake Ohishi

ICOOPMA2012 Program and Abstracts 166 2012.6

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Size and Concentration Dependent Luminescence of Mono-dispersed Tb³⁺ -Yb³⁺ Co-doped LiYF4 Nanoparticles. Reviewed

Shinya Uechi*, Xiaojie Xue*, Takenobu Suzuki, Yasutake Ohishi

ICOOPMA2012 Program and Abstracts 226 2012.6

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Raman Response and SSFS in Phospho-Tellurite Fiber. Reviewed

Shohei Miyoshi*, Xin Yan*, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest JM5A.4 2012.6

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Coherent Multiple Pulses Generation in a Passively Mode-locked Fiber Laser Cavity with Normal Disperion. Reviewed

ガオウェイチン, メイソン　リャオ, Hiroyasu Kawashima*, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest JM5A.2 2012.6

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Phase matching in tellurite/ phospho-tellurite hybrid microstructured optical fiber. Reviewed

エドモンド　サミュエル, Xin Yan*, メイソン　リャオ, ゾオンチャオ　デュアン, Tong Hoang Tuan*, Takenobu Suzuki, Yasutake Ohishi

Proc. of SPIE 8434 843416 - 1 2012.5

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All-fiber broadband supercontinuum generation in a single-mode high nonlinear silica fiber. Reviewed

ガオウェイチン, メイソン　リャオ, Lingzhen Yang*, Xin Yan*, Takenobu Suzuki, Yasutake Ohishi

Proc. of SPIE 8434 843419 - 1 2012.5

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All-fiber quasi-continuous wave supercontinuum generation in single-mode high-nonlinear fiber pumped by submicrosecond pulse with low peak power. Reviewed

ガオウェイチン, メイソン　リャオ, X. Yan*, Takenobu Suzuki, Yasutake Ohishi

Applied Optics 51 ( 13 ) 2346 - 2350 2012.5

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Investigation of Erbium-doped Tellurite Glasses for a Planar Waveguide Power Amplifier at 1.57μm. Reviewed

J. I. Mackenzie University of Southampton*, G. S. Murugan University of Southampton*, Takenobu Suzuki, Yasutake Ohishi, A.W.Yu NASA Goddard Space Flight Center*, J. B. Abshire NASA Goddard Space Flight Center*

CLEO Technical Digest (c)OSA 2012 ATu2G.7 2012.5

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Dark Pulses Observed in a Mode-locked Long Ring Cavity with Single-mode Tellurite Fiber. Reviewed

ガオウェイチン, メイソン　リャオ, Hiroyasu Kawashima*, Takenobu Suzuki, Yasutake Ohishi

CLEO Technical Digest (c)OSA 2012 JWA2A.60 2012.5

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Energy transfer analysis of Tb³⁺ and Yb³⁺ ions doped in borosilicate glass. Reviewed

Takenobu Suzuki, Kento Mizuno*, Yasutake Ohishi

Proc. of SPIE 8433 84331R - 1 2012.5

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Tellurite Composite Microstructured Optical Fibers with Ultra-flattened, Near-zero Dispersion Profile for Nonlinear Applications. Reviewed

ゾオンチャオ　デュアン, メイソン　リャオ, xin yzn*, Takenobu Suzuki, Yasutake Ohishi

CLEO Technical Digest (c)OSA 2012 JW2A.58 2012.5

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Supercontinuum Generation in Short Soft Glass Microstructured Fibers Pumped by Quasi-CW Laser. Reviewed

メイソン　リャオ, ガオウェイチン, Xin Yan*, ゾオンチャオ　デュアン, Takenobu Suzuki, Yasutake Ohishi

CLEO Technical Digest (c)OSA 2012 JW4A.55 2012.5

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Low Noise Quantum-correlated Photon Pair Generation in Composite Tellurite/Phosphate Microstructured Optical Fibers. Reviewed

Xin Yan*, メイソン　リャオ, T.H. Tuan*, Takenobu Suzuki, Yasutake Ohishi

CLEO Technical Digest (c)OSA 2012 JW4A.24 2012.5

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First Laser Oscillation of Solar-pumped Fiber. Reviewed

Shintaro Mizuno Toyota Central R&D Labs.Inc.*, Hiroshi Ito Toyota Central R&D Labs.Inc.*, Kazuo Hasegawa Toyota Central R&D Labs.Inc.*, Takenobu Suzuki, Yasutake Ohishi

ALPS'12 Conference Program & Abstracts 141 - 142 2012.4

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Tellurite composite microstructured optical fibers with ultra-flattened and zero dispersion Reviewed

ゾオンチャオ　デュアン, メイソン　リャオ, T. Kohoutek*, Hoang Tuan Tong*, K. Asano*, Takenobu Suzuki, Yasutake Ohishi

Proc. of SPIE 8426 84261C - 1 2012.4

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Chalcogenide-tellurite composite microstructured optical fibre. Reviewed

トーマス　コホーテク, ゾオンチャオ　デュアン, シン　ヤン, Takenobu Suzuki, M. Matsumoto*, T. Misumi*, Yasutake Ohishi

Proceedings of SPIE 8257 82570D - 1 2012.3

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Novel tellurite-phosphate composite microstructured optical fibers for nonlinear applications Reviewed

T. H. Tong*, シン　ヤン, ゾオンチャオ　デュアン, メイソン　リャオ, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 8257 825711 - 1 2012.3

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A dispersion flattened tellurite composite holey fiber. Reviewed

メイソン　リャオ, ゾオンチャオ　デュアン, ガオウェイチン, シン　ヤン, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 8257 82570Y - 1 2012.3

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Passively mode-locked and Q-switched operation in a fiber laser cavity with normal dispersion Reviewed

ガオウェイチン, メイソン　リャオ, シン　ヤン, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 8257 82570W - 1 2012.3

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Publishing type：Research paper (international conference proceedings)
Numerical simulation of Nd-fluoride and tellurite solar-pumped fiber lasers Reviewed

Takenobu Suzuki, H.Nasu*, S. Mizuno Toyota Central R&D Labs., Inc.*, H. Ito Toyota Central R&D Labs., Inc*, K. Hasegawa Toyota Central R&D Labs., Inc*, Yasutake Ohishi

Proceedings of SPIE 8257 825710 - 1 2012.3

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Quantum-correlated photon pair generation in tellurite microstructured optical fibers. Reviewed

シン　ヤン, メイソン　リャオ, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 8257 82570U - 1 2012.3

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Laser emission from a solar-pumped fiber Reviewed

Shintaro Mizuno, Hiroshi Ito, Kazuo Hasegawa, Takenobu Suzuki, Yasutake Ohishi

OPTICS EXPRESS 20 ( 6 ) 5891 - 5895 2012.3 （ ISSN:1094-4087 ）

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We report the realization of a solar-pumped fiber laser (SPFL) using a double-clad (a center core/ an inner clad working also as optical waveguide/ an outer clad) Nd-doped fluoride optical fiber as a laser medium. With a compact off-axis parabolic mirror of 5 cm in aperture diameter, the natural sunlight is concentrated by a factor 10(4), and introduced partly into the core of the fiber and partly into the inner clad in which the light is guided in some distance and transferred to the core after all. We have obtained clear laser spectrum characteristics with approximately 0.01 nm full-width-half-maximum of the laser line at the peak wavelength of 1053.7 nm, a low-lasing threshold of 49.1 mW, a slope efficiency of 6.6%, and a total efficiency of 1.76%. Further optimization of the medium properties, optical cavity, and concentration technique will yield higher efficiency and lower threshold. (c) 2012 Optical Society of America

DOI： 10.1364/OE.20.005891
All-fiber broadband supercontinuum source with high efficiency in a step-index high nonlinear silica fiber Reviewed

Weiqing Gao, Meisong Liao, Lingzhen Yang, Xin Yan, Takenobu Suzuki, Yasutake Ohishi

APPLIED OPTICS 51 ( 8 ) 1071 - 1075 2012.3 （ ISSN:1559-128X eISSN:2155-3165 ）

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We demonstrate an all-fiber broadband supercontinuum (SC) source with high efficiency in a step-index high nonlinear silica fiber, which was pumped by a 1557 nm subpicosecond-pulse laser in the normal dispersion region. The broad SC spectrum covers the spectral range from 840 to 2390 nm, and the 10 dB bandwidth from 1120 nm to 2245 nm of the SC covers one octave, assuming the peaks near 1550 nm were filtered. The SC source system is constructed by all-fiber components, which can be fusion-spliced together directly with low loss, less than 0.1 dB. Thus the SC source has high energy transfer efficiency from the pump source. The maximum SC average power of 332 mW is obtained, including the peaks near 1550 nm. The spectral density for the 10 dB bandwidth is in the range from -17.3 to -7.3 dBm/nm. (C) 2012 Optical Society of America

DOI： 10.1364/AO.51.001071
Tb³⁺/Yb³⁺ Co-doped KY₃F₁₀ Monodispersed Nanocrystals: Hydrothermal Synthesis and Upconversion Luminescence Reviewed

X. Xue*, Takenobu Suzuki, Yasutake Ohishi

4th International Workshops on Photoluminescence in Rare Earths: Photonic Materials and Devices 2012 78 2012.3

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Synthesis and Luminescent Properties of Self-Assembly LiCaAIF₆: Cr³⁺ Microcrystals via Polyol-Mediated Solvothermal Method Reviewed

X. Xue*, T. Morikawa*, Takenobu Suzuki, Yasutake Ohishi

4th International Workshop on Photoluminescence in Rare Earths: Photonic Materials and Devices 2012 148 2012.3

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Quantum efficiency of Nd-doped phosphate glass under simulated sunlight Reviewed

K. Nogata*, Takenobu Suzuki, Yasutake Ohishi

4th International Workshop on Photoluminescence in Rare Earths: Photonic Materials and Devices 2012 152 2012.3

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Quantum-correlated photon pair generation in tellurite microstructured optical fibers Reviewed

シン　ヤン, メイソン　リャオ, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 8257 2012.2 （ ISBN:978-0-8194-8900-5 ）

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Er-doped Tellurite glasses for planar waveguide power amplifier with extended gain bandwidth Reviewed

J. I. Mackenzie*, G. S. Murugan*, Takenobu Suzuki, Yasutake Ohishi, A. W. Yu*, J. B. Abshire*

Proceedings of SPIE 8235 2012.2

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Raman transient response and enhanced soliton self-frequency shift in ZBLAN fiber Reviewed

Xin Yan, Chihiro Kito, Shohei Miyoshi, Meisong Liao, Takenobu Suzuki, Yasutake Ohishi

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS 29 ( 2 ) 238 - 243 2012.2 （ ISSN:0740-3224 eISSN:1520-8540 ）

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We have measured the Raman gain coefficient spectrum and third-order susceptibility chi((3)) of a fluoride ZBLAN glass and the Raman response function and Raman fraction of ZBLAN fiber are obtained from the Raman gain coefficient spectrum. We evaluate the performance of soliton self-frequency shift in ZBLAN fiber based on Raman gain coefficient spectrum and generalized nonlinear Schrodinger equation. It is numerically demonstrated that using ZBLAN fiber allows a significant enhancement of the soliton self-frequency shift as compared to silica fiber with comparable dispersion. (C) 2012 Optical Society of America

DOI： 10.1364/JOSAB.29.000238
Directly draw highly nonlinear tellurite microstructured fiber with diameter varying sharply in a short fiber length Reviewed

メイソン　リャオ, ガオウェイチン, ゾオンチャオ　デュアン, シン　ヤン, Takenobu Suzuki, Yasutake Ohishi

Optics Express 20 ( 2 ) 1141 - 1150 2012.1

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Directly draw highly nonlinear tellurite microstructured fiber with diameter varying sharply in a short fiber length Reviewed

Meisong Liao, Weiqing Gao, Zhongchao Duan, Xin Yan, Takenobu Suzuki, Yasutake Ohishi

OPTICS EXPRESS 20 ( 2 ) 1141 - 1150 2012.1 （ ISSN:1094-4087 ）

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We demonstrate theoretically and experimentally that it is feasible to draw the microstructured fiber with longitudinally varying diameter (FLVD) whose diameter varies sharply in a short fiber length. It is elucidated that during the fiber drawing process the tension is linearly proportional to the natural logarithm of the fiber drawing speed. As a result, the tension is not so sensitive to the fiber diameter. Moreover, this sensitivity can be decreased by using a large diameter ratio of preform to fiber. Owing to the low sensitivity the FLVD with diameter varying sharply in a short fiber length can be drawn directly from the preform. Additionally we show that the microstructural geometry of FLVD does not depend on the varying diameter. The deformation in microstructural geometry is determined by the fiber segment with the smallest diameter. We fabricate a FLVD of which the diameter decreases by 75% in a fiber length of 10 cm. By using this fiber we demonstrate the 600-1800 nm supercontinuum (SC) generation and the 532 nm second harmonic generation pumped by a picosecond fiber laser. The SC spectra by the conventional fibers with the largest and the smallest diameters of the FLVD are also shown, respectively. The comparisons show that the FLVD has the broadest SC spectrum due to its high nonlinearity, varying dispersion, and high damage threshold. (C)2012 Optical Society of America

DOI： 10.1364/OE.20.001141
Intense Ultraviolet and Blue Upconverison Emissions in Tb3+/Yb3+ Codoped KY3F10 Nanocrystals Reviewed

Xiaojie Xue*, メイソン　リャオ, ラジャニシュ　ティワリ, 吉村　雅満, Takenobu Suzuki, Yasutake Ohishi

Appl. Phys. Express ( 5 ) 092601 2012

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Highly efficient relief diffraction gratings inscribed on a chalcogenide bulk glass by a femtosecond laser Reviewed

T. Kohoutek, M. A. Hughes, H. Kawashima, M. Mastumoto, T. Misumi, T. Suzuki, Y. Ohishi

MICRO-OPTICS 2012 8428 84281C - 1 2012 （ ISSN:0277-786X ）

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Direct laser writing has been already demonstrated for the fabrication of under surface "buried" 3D mid-IR waveguides in chalcogenide glasses by employing a large photo-induced refractive index change in the features formed in the path of the focused beam from a short pulse laser. In this paper, we report on direct laser writing of relief diffraction gratings with periods of 6, 14 and 24 mu m into the surface of Ge15Ga3Sb12S70 chalcogenide glass by using a 800 nm Ti:saphire femtosecond pulse laser. The first order diffraction efficiency of the fabricated gratings was over 60 % at 650 nm. We have also fabricated a "composite" grating composed of three relief diffraction gratings inscribed in the same position, but with a mutual tilt. Composite grating provided complex multidirectional diffraction of the light in the accordance with geometrical arrangement and grating period of all the gratings inscribed. The fabrication was implemented on a computer controlled stage employing surface-to-beam alignment, laser power and raster pattern control. Pulse energies of 1.5, 3.0 and 4.5 mu J were used, resulting in channel widths of around 4, 5 and 6 mu m, respectively, and depths up to 1.7 mu m. We propose practical applications including surface relief diffraction micro-gratings at the ends of multimode chalcogenide optical waveguides or on the surfaces of bare core optical fibers used for chemical sensing.

DOI： 10.1117/12.921381
Low Noise Quantum-correlated Photon Pair Generation in Composite Tellurite/Phoshpate Microstructured Optical Fibers Reviewed

Xin Yan, Meisong Liao, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) 2012 （ ISSN:2160-9020 ）

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We proposed a TBSN16P6W tellurite/phosphate composite microstructured optical fiber with small dispersion value and high nonlinear coefficient at telecommunication wavelengths to realize efficient and low noise quantum-correlated photon pair generation.
Investigation of Erbium-doped Tellurite Glasses for a Planar Waveguide Power Amplifier at 1.57 mu m Reviewed

J. I. Mackenzie, G. S. Murugan, T. Suzuki, Y. Ohishi, A. W. Yu, J. B. Abshire

2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) 2012 （ ISSN:2160-9020 ）

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Comparing gain in Er-doped tellurite glasses for CO2 absorption measurements, a maximum gain of 2.2dB/cm with 8 ms fluorescence lifetime has been obtained at 1572 nm using a 974 nm pump with intensity of 8kW/cm(2).
Investigation of local field effect of alpha-NaYF4:Nd3+ nanocrystals Reviewed

Xiaojie Xue, Takenobu Suzuki, Hoang Tuan Tong, Yasutake Ohishi

PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 9, NO 12 9 ( 12 ) 2481 - 2484 2012 （ ISSN:1862-6351 ）

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Pure alpha-NaYF4: Nd3+ nanocrystals of various sizes from 6 nm to 18 nm were successfully synthesized by a solvothermal method. The monodispersed oleate-capped nanocrystals were dispersed in several nonpolar solvents to obtain stable colloidal. Under the excitation by an 803 nm laser, luminescent decay curves of the colloidal were measured. The relationship between emission lifetimes of samples and effective refractive indices of solvents was studied for the local field correction factor. In the 18 nm sample, the real cavity model was preferable model. As the particle size decreased to 6 nm, the preferred model altered from the real cavity model to the virtual cavity model which might be derived from changing of polarizability density. (C) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

DOI： 10.1002/pssc.201200249
Coherent Multiple Pulses Generation in a Passively Mode-locked Fiber Laser Cavity with Normal Dispersion Reviewed

Weiqing Gao, Meisong Liao, Hiroyasu Kawashima, Takenobu Suzuki, Yasutake Ohishi

Advanced Photonics Congress 2012

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DOI： 10.1364/anic.2012.jm5a.2
Novel tellurite-phosphate composite microstructured optical fibers for nonlinear applications Reviewed

Tong Hoang Tuan, Xin Yan, ZhongChao Duan, Meisong Liao, Takenobu Suzuki, Yasutake Ohishi

OPTICAL COMPONENTS AND MATERIALS IX 8257 2012 （ ISSN:0277-786X ）

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Four wave mixing and supercontinuum from tellurite photonic crystal fibers have been widely researched. Their efficiencies depend largely on fiber nonlinearity and chromatic dispersion. Since we have shown that the composite microstructured optical fibers (CMOFs) can have high flexibility on chromatic dispersion control when refractive index difference between core and cladding becomes larger, cladding materials with much lower refractive index than tellurite glass are required. We report here a novel tellurite core-phosphate cladding CMOF. Phosphate glasses which thermal expansion coefficient, viscosity, glass transition, deformation and crystallization temperatures are close to those of tellurite 78TeO(2) - 5ZnO - 12Li(2)O - 5Bi(2)O(3) mol% (TZLB) glass are systematically investigated. The phosphate glasses we developed have high transparency and broad transmission region up to 3 mu m as well as notably low refractive indices. Using the phosphate glasses doped with mixed-alkali oxides obtained in this work, the refractive index difference between core and cladding becomes as high as 0.5 which is sufficiently high to control the chromatic dispersion with high freedom. Our work shows that tellurite-phosphate CMOFs are promising candidates as highly nonlinear fibers with freely controlled chromatic dispersion for nonlinear applications.

DOI： 10.1117/12.906938
Optical properties of Er3+-doped glasses for solar-pumped lasers Reviewed

Yasuyuki Iwata, Takenobu Suzuki, Yasutake Ohishi

PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 9, NO 12 9 ( 12 ) 2344 - 2347 2012 （ ISSN:1862-6351 ）

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The quantum efficiency (QE) of Er3+-doped silicate, tellurite, phosphate and fluoride glasses have been examined under simulated sunlight excitation. The maximum of total QE, the sum of QE of S-4(3/2), I-4(11/2), I-4(13/2)-> I-4(15/2) and S-4(3/2)-> I-4(13/2) transition, is 75% and the maximum of QE1530, the QE of the I-4(13/2)-> I-4(15/2) transition at 1530 nm, is 34 % for 5.47x10(19) cm(-3) Er3+-doped fluoride glass. The figure of merit as laser media st of silicate glass is 1.00x10(-22) cm(2)sec, which is the highest in 4 glasses. Although QE1530 of silicate is lower than fluoride, it is possible to compensate the low quantum efficiency to optimize the fiber laser design. Therefore Er3+-doped fluoride and silicate glasses are expected to be promising candidates as solar-pumped glass laser. (C) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

DOI： 10.1002/pssc.201200293
ナノLiCaAIF₆ 結晶の光学特性 Reviewed

森川　貴司*, Xuaojie Xue*, 鈴木　健伸, 大石　泰丈

平成23年度日本セラミックス協会東海支部学術研究発表会　講演要旨集 34 2011.12

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テルライト光ファイバのラマンソリトン効果 Reviewed

三好　祥平*, 塩坂 W. 輝生*, 鬼頭　千尋*, シン　ヤン, 鈴木　健伸, 大石　泰丈

平成23年度日本セラミックス協会東海支部学術研究発表会　講演要旨集 37 2011.12

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希土類含有LiYF₄ナノ結晶の光学特性 Reviewed

上地　慎也*, Xiaojie Xue*, 鈴木　健伸, 大石　泰丈

平成23年度日本セラミックス協会東海支部学術研究発表会　講演要旨集 35 2011.12

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リン酸塩ガラスを用いた太陽光励起ファイバレーザ媒体の研究 Reviewed

野形康平*, 鈴木　健伸, 大石　泰丈

平成23年度日本セラミックス協会東海支部学術研究発表会　講演要旨集 36 2011.12

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Dispersion engineering of tellurite holey fiber with holes formed by two glasses for highly nonlinear applications Reviewed

メイソン　リャオ, ゾオンチャオ　デュアン, ガオウェイチン, シン　ヤン, Takenobu Suzuki, Yasutake Ohishi

Applied Physics B:Lasers and Optics 105 ( 4 ) 681 - 684 2011.11

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Spectroscopic Investigation of Nd3+-doped ZBLAN Glass for Solar Pumped Lasers. Reviewed

Takenobu Suzuki, H. Kawai*, H. Nasu*, S. Mizuno Toyota Central R&D Laboratories Inc.*, H. Ito Toyota Central R&D Laboratories Inc*, K. Hasegawa Toyota Central R&D Laboratories Inc*, Yasutake Ohishi

Renewable Energy and the Environment, OSA Technical Digest 2011.11

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Dispersion engineering of tellurite holey fiber with holes formed by two glasses for highly nonlinear applications Reviewed

メイソン　リャオ, ゾオンチャオ　デュアン, ガオウェイチン, シン　ヤン, Takenobu Suzuki, Yasutake Ohishi

Applied Physics B:Lasers and Optics 15 ( 4 ) 681 - 684 2011.11

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Spectroscopic properties of Nd³⁺-doped ZBLAN Glass for Solar Pumped Lasers Reviewed

Takenobu Suzuki, H. Kawai*, H. Nasu*, S. Mizuno Toyota Central R&D Laboratories Inc.*, H. Ito Toyota Central R&D Laboratories Inc*, K. Hasegawa Toyota Central R&D Laboratories Inc*, Yasutake Ohishi

Renewable Energy and the Environment Technical Digest 2011 OSA JWE24 2011.11

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Defected core tellurite/phosphate composite microstructured optical fiber with four zero dispersion wavelengths Reviewed

シン　ヤン, メイソン　リャオ, T. H. Tuan*, Takenobu Suzuki, Yasutake Ohishi

FIO/LS Technical Digest@2011 OSA JWA20 2011.10

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Visible Light Generation and Its Influence on Supercontinuum in Chalcogenide As2S3 Microstructured Optical Fiber Reviewed

Weiqing Gao, Meisong Liao, Xin Yan, Chihiro Kito, Tomas Kohoutek, Takenobu Suzuki, Mohammed El-Amraoui, Jean-Charles Jules, Gregory Gadret, Frederic Desevedavy, Frederic Smektala, Yasutake Ohishi

APPLIED PHYSICS EXPRESS 4 ( 10 ) 2011.10 （ ISSN:1882-0778 ）

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We demonstrate visible light generation in chalcogenide As2S3 microstructured optical fiber. The generated visible light causes irreversible damage to the fiber core because of the high absorption coefficient of chalcogenide glasses in the visible band. The SCs (supercontinua) are measured in both untapered and tapered As2S3 fibers, no wider SC is obtained in the tapered one. The SC growth is prevented by the visible light generation since the damage to the fiber core decreases the fiber transmission substantially. This effect can be avoided by designing the fiber to enable the pump source to work in single-mode operation. (C) 2011 The Japan Society of Applied Physics

DOI： 10.1143/APEX.4.102601
Visible Light Generation and Its Influence on Supercontinuumin Chalcogenide As₂S₃ Microstructured Optical Fiber Reviewed

ガオウェイチン, メイソン　リャオ, シン　ヤン, Chihiro Kito*, トーマス　コホーテク, Takenobu Suzuki, Mohammed El-Amraoui ICB Laboratoire Interdisciplinaire Carnot de Bourgogne*, Fre´de´ ric Smektala ICB Laboratoire Interdisciplinaire Carnot de Bourgogne*, Yasutake Ohishi, 他3名*

Applied Physics Express 4 ( 7 ) 102601 - 1 2011.9

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Enhanced Raman gain of Ge-Ga-Sb-S chalcogenide glass for highly nonlinear microstructured optical fibers Reviewed

Tomas Kohoutek, Xin Yan, Teruo W. Shiosaka, Spyros N. Yannopoulos, Athanassios Chrissanthopoulos, Takenobu Suzuki, Yasutake Ohishi

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS 28 ( 9 ) 2284 - 2290 2011.9 （ ISSN:0740-3224 ）

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The off-resonance Raman spectra of As(2)S(3), GeS(2), Ge(25)Ga(5)S(70), Ge(23)As(12)S(65), Ge(23)Sb(12)S(65), and Ge(17)Ga(4)Sb(10)S(69) chalcogenide glasses have been recorded and the corresponding Raman gain coefficients have been calculated in order to evaluate the role of Ge, Ga, Sb, and As on a novel Ge(17)Ga(4)Sb(10)S(69) glass proposed for highly nonlinear microstructured optical fibers. We calculated the Raman response functions of As(2)S(3) n(2) 23 x 10(-1)7 m(2)/W, G similar to 278 x 10(-11) m/W; and Ge(17)Ga(4)Sb(10)S(69) n(2) = 18 x 10(-17) m(2)/W, G similar to 1.57 x 10(-11) m/W glasses. The supercontinuum generation of a three-air-hole Ge(17)Ga(4)Sb(10)S(69) fiber was simulated, challenging the properties of a similar fiber design made of As(2)S(3) chalcogenide glass. We calculated the zero dispersion wavelengths of Ge(17)Ga(4)Sb(10)S(69) fibers with the core diameters of 1.2, 1.5, and 20 mu m at lambda = 1.48, 1.66, and 1.75 mu m in comparison with lambda = 1.60, 1.87, and 198 mu m obtained for As(2)S(3) fibers. (C) 2011 Optical Society of America
Five-order SRSs and supercontinuum generation from a tapered tellurite microstructured fiber with longitudinally varying dispersion. Reviewed

メイソン　リャオ, シン　ヤン, ガオウェイチン, ゾオンチャオ　デュアン, Guanshi Qin*, Takenobu Suzuki, Yasutake Ohishi

Optics Express 19 ( 16 ) 15389 - 15396 2011.8

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Spectroscopic investigation of Nd ³⁺-doped ZBLAN glass for solar-pumped lasers. Reviewed

Takenobu Suzuki, Hiroyuki Kawai*, Hiroyuki Nasu*, Shintaro Mizuno Toyota Central R&D Labs., Inc.*, Hiroshi Ito Toyota Central R&D Labs., Inc.*, Kazuo Hasegawa Toyota Central R&D Labs., Inc.*, Yasutake Ohishi

J. Opt. Soc. Am. B 28 ( 8 ) 2001 - 2006 2011.7

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Transient Raman response effects on the soliton self-frequency shift in tellurite microstructured optical fiber. Reviewed

シン　ヤン, Guanshi Qin*, メイソン　リャオ, Takenobu Suzuki, Yasutake Ohishi

J. Opt.Soc.Am.B 28 ( 8 ) 1831 - 1836 2011.7

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Tellurite Composite Microstructured Optical Fibers with Tailored Chromatic Dispersion for Nonlinear Applications. Reviewed

ゾオンチャオ　デュアン, メイソン　リャオ, シン　ヤン, Chihiro Kito*, Takenobu Suzuki, Yasutake Ohishi

Applied Physics Express 4 ( 7 ) 072502 - 1 2011.7

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Computational and Raman Studies of Phospho-Tellurite Glasses as Ultrabroad Raman Gain Media Reviewed

Takenobu Suzuki, T. W. Shiosaka*, S. Miyoshi*, Yasutake Ohishi

Journal of Non-Crystalline Solids 357 ( 14 ) 2702 - 2707 2011.7

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Quantum efficiency of Nd-doped tellurite and fluoride glasses under sunlight excitation and the numerical simulation of the solar pumped fiber lasers Reviewed

Takenobu Suzuki, H. Nasu*, S. Mizuno Toyota Central R&D Labs., Inc.*, H. Ito Toyota Central R&D Labs., Inc.*, K. Hasegawa Toyota Central R&D Labs., Inc.*, Yasutake Ohishi

Abstracts 2011.7

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Third harmonic generation measurement of non-linear optical susceptibility χ⁽³⁾ of GeGaSbS chalcogenide glasses for highly non-linear micro-structured optical fibers Reviewed

トーマス　コホーテク, Takenobu Suzuki, Yasutake Ohishi

Abstracts 2011.7

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Recent Progress on Tellurite Suspended Nanowires Reviewed

メイソン　リャオ, ガオウェイチン, シン　ヤン, ゾオンチャオ　デュアン, Takenobu Suzuki, Yasutake Ohishi

1st International Applied Photonics Technology Conference Advanced Program 31 - 34 2011.7

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Tellurite Microstructured Fibers and Their Applications. Reviewed

Yasutake Ohishi, メイソン　リャオ, シン　ヤン, ゾオンチャオ　デュアン, Takenobu Suzuki

The 16th Opto-Electronics and Communications Conference, OECC 2011 51 - 52 2011.7

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Enhanced Soliton Self-Frequency Shift in Tellurite Microstructured Fiber Reviewed

シン　ヤン, Guanshi Qin*, メイソン　リャオ, Takenobu Suzuki, Yasutake Ohishi

The 16th Opto-Electronics and Communications Conference, OECC 2011 49 - 50 2011.7

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Soft Glass Microstructured Fiber Reviewed

メイソン　リャオ, シン　ヤン, ゾオンチャオ　デュアン, ガオウェイチン, Takenobu Suzuki, Yasutake Ohishi

The 16th Opto-Electronics and Communications Conference, OECC 2011 603 - 604 2011.7

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Ultrawide Supercontinuum Generation in Ge-Ga-Sb-S Chalcogenide Microstructured Fiber Reviewed

シン　ヤン, トーマス　コホーテク, メイソン　リャオ, Takenobu Suzuki, Yasutake Ohishi

The 16th Opto-Electronics and Communications Conference, OECC2011 630 - 631 2011.7

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Tellurite suspended nanowire surrounded with large holes for single-mode SC and THG generations. Reviewed

メイソン　リャオ, Guanshi Qin*, シン　ヤン, Chitrarekha Chaudhari*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 8073 80732I - 1 2011.5

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Tellurite composite microstructured optical fibers with high nonlinearity and flattened dispersion for nonlinear application. Reviewed

シン　ヤン, メイソン　リャオ, Tong Hoang Tuan*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 8073 80732W - 1 2011.5 （ ISBN:978-0-8194-8663-9 ）

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Wideband Supercontinuum Generation in Tapered Tellurite Microstructured Fibers. Reviewed

G.S. Qin*, シン　ヤン, メイソン　リャオ, A. Mori NTT Photonics Laboratories*, Takenobu Suzuki, Yasutake Ohishi

Laser Physics 21 ( 6 ) 1115 - 1121 2011.5

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Publishing type：Research paper (scientific journal)
Tellurite Composite Microstructured Fibers with Tailed Chromatic Dispersion for Nonlinear Applications Reviewed

ゾオンチャオ　デュアン, メイソン　リャオ, シン　ヤン, C. Kito*, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest (CD) CI_P4 2011.5

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Tellurite Suspended Core Nanofiber with Extremely Large Holey Region Reviewed

メイソン　リャオ, シン　ヤン, G. Qin*, C. Kito*, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest (CD) JWA36 2011.5

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Visible Light Generation and Its Influence to Supercontinuum in As₂S₃ Microstructured Fiber Reviewed

ガオウェイチン, メイソン　リャオ, シン　ヤン, C. Kito*, Takenobu Suzuki, M. El-Amraoui ICB Laboratoire Interdisciplinaire Carnot de Bourgogne*, Jean-Charles Jules ICB Laboratoire Interdisciplinaire Carnot de Bourgogne*, F. Smektala ICB Laboratoire Interdisciplinaire Carnot de Bourgogne*, Yasutake Ohishi, 他2名*

OSA Technical Digest (CD) JWA66 2011.5

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Tellurite Nanostructured Fiber Reviewed

メイソン　リャオ, シン　ヤン, ゾオンチャオ　デュアン, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest (CD) CME5 2011.5

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Tellurite/Phosphate Composite Microstructured Optical Fiber with High Nonlinearity and Flattened Dispersion Reviewed

シン　ヤン, メイソン　リャオ, T. H. Tuan*, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest (CD) CE_P31 2011.5

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Transient Raman Response of Novel Chalcogenide Micro-structured Optical Fiber Reviewed

トーマス　コホーテク, シン　ヤン, T. W. Shiosaka*, S. Mizuno Toyota Central R&D Labs., Inc.*, S. N Yannoppoulos Institute of Chemical Engineering and High Temperature Chemical Processes*, Takenobu Suzuki, Yasutake Ohishi

OSA Technical Digest (CD) CE_P30 2011.5

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Quantum efficiency of Nd³⁺-doped glasses under sunlight excitation. Reviewed

Takenobu Suzuki, Hiroyuki Kawai*, Hiroyuki Nasu*, Mark Hughes*, Yasutake Ohishi, Shintaro Mizuno Toyota Central R&D Labs. Inc.*

Optical Materials 33 1952 - 1957 2011.4

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Spectroscopic properties of Er doped and Er, Nd codoped fluoride glasses under simulated sunlight illumination. Reviewed

Shintaro Mizuno Toyota Central R&D Labs., Inc.*, Hiroshi Ito Toyota Central R&D Labs., Inc.*, Kazuo Hasegawa Toyota Central R&D Labs., Inc.*, Hiroyuki Kawai*, Hiroyuki Nasu*, Mark A. Hughes*, Takenobu Suzuki, Yasutake Ohishi

Optical Materials 33 1958 - 1963 2011.4

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Preparation of novel transparent glass-ceramics containing fluoride crystals. Reviewed

Takenobu Suzuki, Shin-ichiro Masaki*, Kento Mizuno*, Yasutake Ohishi

Optical Materials 33 1943 - 1947 2011.4

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Tellurite Photonic Nanostructured Fiber Reviewed

メイソン　リャオ, シン　ヤン, ゾオンチャオ　デュアン, Takenobu Suzuki, Yasutake Ohishi

Journal of Lightwave Technology 29 ( 7 ) 1018 - 1025 2011.4

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Tellurite Nanowire for Single-Mode Low Threshold Supercontinuum Generation Reviewed

メイソン　リャオ, Guanshi Qin*, シン　ヤン, Takenobu Suzuki, Yasutake Ohishi

Optical Fiber Communication Conference, OSA technical Digest, OThs5 2011.3

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Er³⁺添加フッ化物ガラスの疑似太陽光照射下の発光特性 Reviewed

水野真太郎豊田中央研究所*, 伊藤博豊田中央研究所*, 長谷川和男豊田中央研究所*, 河井優幸*, 那須寛之*, 鈴木　健伸, 大石　泰丈

講演予稿集 16 - 020 2011.3

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太陽光励起Nd³⁺添加ZBLANファイバレーザの実現性（Ⅱ）：太陽光励起ファイバレーザの数値設計 Reviewed

鈴木　健伸, 那須博之*, 水野真太郎豊田中央研究所*, 伊藤博豊田中央研究所*, 長谷川和男豊田中央研究所*, 大石　泰丈

第58回応用物理学関係連合講演会　講演予稿集 04 - 105 2011.3

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太陽光励起Nd³⁺添加ZBLANファイバレーザの実現性（Ⅰ）：太陽光照射下での量子効率 Reviewed

鈴木　健伸, 那須博之*, 水野真太郎豊田中央研究所*, 伊藤博豊田中央研究所*, 長谷川和男豊田中央研究所*, 大石　泰丈

第58回応用物理学関係連合講演会　講演予稿集 04 - 104 2011.3

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太陽光励起Nd³⁺添加ZBLANファイバレーザの実現性(Ⅲ）：Nd³⁺添加ZBLANダブルクラッドファイバの光学特性 Reviewed

水野真太郎豊田中央研究所*, 伊藤博豊田中央研究所*, 長谷川和男豊田中央研究所*, 那須寛之*, 鈴木　健伸, 大石　泰丈

講演予稿集 04 - 106 2011.3

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Third-harmonic generation measurement of nonlinear optical susceptibility x ⁽³⁾ of Ge-Ca-Sb-S chalcogenide glasses proposed for highly nonlinear photonic fibers Reviewed

トーマス　コホーテク, Shintaro Mizuno Toyota Central R and D Labs, Inc.*, Takenobu Suzuki, Yasutake Ohishi, Morio Matsumoto Furukawa Denshi Co., Ltd.*, Takashi Misumi Furukawa Denshi Co., Ltd.*

Journal of the Optical Society of America B 28 ( 2 ) 298 - 305 2011.2

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Third-harmonic generation measurement of nonlinear optical susceptibility. chi((3)) of Ge-Ga-Sb-S chalcogenide glasses proposed for highly nonlinear photonic fibers

Tomas Kohoutek, Shintaro Mizuno, Takenobu Suzuki, Yasutake Ohishi, Morio Matsumoto, Takashi Misumi

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS 28 ( 2 ) 298 - 305 2011.2 （ ISSN:0740-3224 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：OPTICAL SOC AMER

We measured the nonlinear optical susceptibility chi((3)) of some Ge-Ga-Sb-S chalcogenide glasses feasible for the fabrication of highly nonlinear photonic crystal fibers. The chi((3)) values of Ge17Ga4Sb10S69, Ge20Ga5Sb10S65, and Ge20Ga5Sb6S69 glasses were found to be 3.5, 2.6, and 1.8 x 10(-19) m(2)/V-2 (6.3, 4.6, and 3.2 x 10(-12) esu, where "esu" stands for electrostatic unit) at the fundamental wavelength lambda = 1.9 mu m, i.e., 227, 167, and 117 times higher than that of standard silica [1.55 x 10(-21) m(2)/V-2 (2.79 x 10(-14) esu)]. Their nonlinear refractive indices n(2) were then obtained as 1.8, 1.3, and 1 x 10(-17) m(2)/W (5.1, 3.7, and 2.7 x 10(-11) esu). They are similar to 78, 56, and 43% of n(2) - 2.3 x 10(-17) m(2)/W (7 x 10(-11) esu) of the As2S3 glass used as the chalcogenide glass reference. (C) 2011 Optical Society of America

DOI： 10.1364/JOSAB.28.000298
A Tellurite Nanowire With Long Suspended Struts for Low-Threshold Single-Mode Supercontinuum Generation Reviewed

メイソン　リャオ, Guanshi Qin*, シン　ヤン, Takenobu Suzuki, Yasutake Ohishi

Journal of Lightwave Technology 29 ( 2 ) 194 - 199 2011.1

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Synthesis of novel transparent glass-ceramics containing rare earth ion-doped YLF nanocrystals for fiber amplifiers and fiber lasers. Reviewed

Takenobu Suzuki, Shin-ichiro Masaki*, Kento Mizuno*, Shintaro Mizuno Toyota Central Research and Development Labs. Inc.,*, Yasutake Ohishi

Proceedings of SPIE 7934 793403 - 1 2011.1

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Highly nonlinear tellurite microstructured fibers for broadband wavelength conversion and flattened supercontinuum generation. Reviewed

Guanshi Qin*, シン　ヤン, Chihiro Kito*, メイソン　リャオ, Takenobu Suzuki, Atsushi Mori NTT Photonics Laboratories*, Yasutake Ohishi

Proceedings of SPIE 7934 79340N - 1 2011.1

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Synthesis of novel transparent glass ceramics containing rare earth ion-doped YLF nanocrystals for fiber amplifiers and fiber lasers. Reviewed

Takenobu Suzuki, Shin-ichiro Masaki*, Kento Mizuno*, Shintaro Mizuno Toyota Central Research and Development Labs.,Inc.*, Yasutake Ohishi

2011 Photonics West Technical Program 236 2011.1

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Emission from a bismuth doped chalcogenide glass spanning from 1µm to 2.7µm. Reviewed

マーク　ヒューズ, Takenobu Suzuki, Yasutake Ohishi

2011 Photonics West Technical Program 237 2011.1

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Soliton self-frequency shift in tellurite microstructured fiber. Reviewed

シン　ヤン, Guanshi Qin*, メイソン　リャオ, Takenobu Suzuki, Yasutake Ohishi

2011 Photonics West Technical Program 237 2011.1

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Dispersion controlled tellurite air-clad fibers for supercontinuum generations pumped by picoseconds and femtosecond respectively. Reviewed

メイソン　リャオ, シン　ヤン, Guanshi Qin*, Chitrarekha B. Chaudhari*, Takenobu Suzuki, Yasutake Ohishi

2011 Photonics West Technical Program 237 2011.1

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Highly nonlinear tellurite microstructured fibers for broadband wavelength conversion and flattened supercontinuum generation. Reviewed

Guanshi Qin*, シン　ヤン, Chihiro Kito*, メイソン　リャオ, Takenobu Suzuki, Yasutake Ohishi

2011 Photonics West Technical Program 237 2011.1

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Spectroscopic properties of Nd Er codoped glasses for solar-pumped fiber lasers. Reviewed

Shintaro Mizuno Toyota Central Research and Development Labs., Inc.*, Hiroyuki Kawai*, Hiroyuki Nasu*, マーク　ヒューズ, Takenobu Suzuki, Yasutake Ohishi

2011 Photonics West Technical Program 238 2011.1

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Soliton self-frequency shift in tellurite microstructured fiber. Reviewed

シン　ヤン, Guanshi Qin*, メイソン　リャオ, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 7934 793413 - 1 2011.1

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Dispersion controlled tellurite air-clad fibers for supercontinuum generations pumped by picoseconds and femtosecond respectively. Reviewed

メイソン　リャオ, シン　ヤン, Guanshi Qin*, Chitrarekha Chaudhari*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 7934 793414 - 1 2011.1

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Emission from a bismuth doped chalcogenide glass spanning from 1µm to 2.7µm. Reviewed

マーク　ヒューズ, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 7934 7934DW - 1 2011.1

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Spectroscopic properties of Nd Er codoped glasses for solar-pumped fiber lasers. Reviewed

Shintaro Mizuno Toyota Central Research and Development Labs. Inc.,*, Hiroshi Ito Toyota Central Research and Development Labs. Inc.,*, Kazuo Hasegawa Toyota Central Research and Development Labs. Inc.,*, Hiroyuki kawai*, Hiroyuki Nasu*, マーク　ヒューズ, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 7934 79341D - 1 2011.1

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Fine control of optical pulse width via doublet gain lines

G. S. Qin, T. Sakamoto, N. Yamamoto, T. Kawanishi, H. Sotobayashi, T. Suzuki, Y. Ohishi

LASER PHYSICS 21 ( 1 ) 158 - 162 2011.1 （ ISSN:1054-660X ）

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We demonstrate a general technique for realizing fine control of optical pulse width via doublet gain or loss lines. The optimized doublet gain or loss lines for fine control of optical pulse width can be designed by using an inverse design method. The preliminary experimental demonstration of fine control of optical pulse width is performed by using doublet Brillouin gain lines in an optical fiber. Tunable pulse compression or stretching ratio of 1.47-0.43 accompanying a time delay is achieved by controlling the separation between two gain lines, for an input pulse train with a 40 ns pulse width and a repetition rate of 5 MHz, in a 4 km silica fiber with a fixed pump power of 88.1 mW.

DOI： 10.1134/S1054660X11010178
Novel Highly Nonlinear Composite Tellurite Microstructured Optical Fibers for SC Generation Reviewed

Zhongchao Duan, Meisong Liao, Xin Yan, Weiqing Gao, Takenobu Suzuki, Yasutake Ohishi

Advanced Photonics 2011

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DOI： 10.1364/anic.2011.jtub7
Five-order SRSs and supercontinuum generation by a tapered tellurite microstructured fiber. Reviewed

メイソン　リャオ, シン　ヤン, ガオウェイチン, ゾオンチャオ　デュアン, Takenobu Suzuki, Yasutake Ohishi

Nonlinear Optics (NLO) Abstracts 2011

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Emission from a bismuth doped chalcogenide glass spanning from 1 mu m to 2.7 mu m Reviewed

M. A. Hughes, T. Suzuki, Y. Ohishi

OPTICAL COMPONENTS AND MATERIALS VIII 7934 2011 （ ISSN:0277-786X ）

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In this paper we report emission from Bi doped gallium lanthanum sulphide (Bi:GLS) glass with a full width at half maximum (FWHM) of 600 nm which is flattened and covers the entire telecommunications window. The excitation wavelength of this emission was 1020 nm, the quantum efficiency (QE) was 17%, the lifetime was 160 mu s and product of the emission cross section and lifetime (sigma(em)tau) was 2x10(-25) cm(2)s. The maximum room temperature QE was 32% at 900 nm excitation. At cryogenic temperatures the FWHM reached 850 nm with 974 nm excitation and we observed two new bismuth emission bands at 2000 and 2600 nm. The QE reached 40% for both 974 and 808 nm excitation at cryogenic temperatures. Emission spectra, normalized to the excitation power, taken with excitation wavelengths of 480-1300 nm, revealed 4 absorption bands at 680, 850, 1020 and 1180 nm. The 1180 nm absorption band was previously unobserved. Deconvolution of the emission spectra into Gaussians indicated 5 distinct emission bands over the entire excitation range. The maximum room and cryogenic temperature lifetimes were 175 and 280 mu s, respectively. Their respective emission and excitation wavelengths were similar to 1500 and 974 nm; and similar to 1600 and 808 nm. By examining previously published models of Bi emission in glasses to see if they could account for the 2000 and 2600 nm emission bands, and reviewing other previously published evidence, we propose that the origin of the emission in Bi:GLS is Bi(2) (2-) dimers.

DOI： 10.1117/12.871206
Dispersion controlled tellurite microstructured fibers for supercontiuum generations pumped by picosecond and femtosecond fiber lasers Reviewed

Meisong Liao, Xin Yan, Guanshi Qin, Chitrarekha Chaudhari, Takenobu Suzuki, Yasutake Ohishi

OPTICAL COMPONENTS AND MATERIALS VIII 7934 2011 （ ISSN:0277-786X ）

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Supercontinuum (SC) generation has the important applications such as broadband light source, optical coherence tomography, ultra-short pulse compression, and optical frequency metrology, etc. Tellurite glass is transparent in the mid-infrared range, and has a higher n(2) than silica glass by at least one order of magnitude. We have fabricated the hexagonally shaped tellurite air-clad fiber with a core diameter of around 1 mu m through controlling the temperature field exactly in the process of fiber-drawing. Since the SC generation strongly depends on the chromatic dispersion, which is determined by the microstructure of fiber, it is interesting to investigate and demonstrate such dependence for such a small core fiber in detail. In this work by pumping a positive pressure of nitrogen gas into the holes of preform, we obtained 1 mu m core fibers with diameter ratio of holey region to core (DRHC) varied from 3.5 to 20. The dispersion was tailored effectively by the variation of DRHC. Dependences of SC on the microstructure and dispersion were demonstrated. The pump lasers were picosecond and femtosecond fiber lasers. One octave flattened SC generation was obtained for the fibers pumped by 1064 nm picosecond fiber laser with the pulse energy of several hundred pJ. Intense second and third harmonic generations were obtained under the pump of a 1557 nm femtosecond fiber laser. The correlation of dispersion and SC spectra was analyzed. Such tellurite microstructured optical fibers (MOFs) with high nonlinearity and controlled dispersion are significant in nonlinear applications.

DOI： 10.1117/12.873689
Visible Light Generation and Its Influence to Supercontinuum in As2S3 Microstructured Fiber Reviewed

Weiqing Gao, Meisong Liao, Xin Yan, Chihiro Kito, Takenobu Suzuki, Mohammed El-Amraoui, Jean-Charles Jules, Gregory Gadret, Frederic Desevedavy, Frederic Smektala, Yasutake Ohishi

2011 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) 2011 （ ISSN:2160-9020 ）

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Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

We demonstrate visible light generation in As2S3 microstructured fiber for the first time. It limits the spectral range of supercontinuum. The visible light generation can be avoided by designing the fiber for the single-mode operation. (C)2011 Optical Society of America
Transient Raman response of novel chalcogenide micro-structured optical fibre Reviewed

Tomas Kohoutek, Xin Yan, Tetsuro W. Shiosaka, Shintaro Mizuno, Spyros N. Yannoppoulos, Takenobu Suzuki, Yasutake Ohishi

2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference, CLEO EUROPE/EQEC 2011 2011 （ ISBN:9781457705335 ）

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We studied Raman response in highly non-linear micro-structured chalcogenide fibres. Determining the optical properties and Raman gain of glasses we evaluated the performance of the fibers using generalized nonlinear Schrdinger equation. © 2011 IEEE.

DOI： 10.1109/CLEOE.2011.5942857
Microstructured chalcogenide optical fibers from As₂S₃ glass: towards new IR broadband sources Reviewed

Yasutake Ohishi, M. El-Amraoui ICB Laboratoire Interdisciplinaire Carnot de Bourgogne*, G. Gadret ICB Laboratoire Interdisciplinaire Carnot de Bourgogne*, I. Skripatchev Institute of Chemistry-UNESP*, J. Troles Sciences Chimiques de Rennes*, L. Brilland PERFOS*, ガオウェイチン, Takenobu Suzuki, F. Smektala ICB Laboratoire Interdisciplinaire Carnot de Bourgogne*, 他5名*

Optics Express 18 ( 25 ) 26655 - 26665 2010.12

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Ge-Ga-Sb-S ガラスの三次高調波発生による非線形感受率の測定 Reviewed

トーマス　コホーテク, 水野真太郎豊田中央研究所*, 鈴木　健伸, 大石　泰丈

第51回ガラスおよびフォトニクス材料討論会講演要旨集 2010.12

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Publishing type：Research paper (international conference proceedings) Publisher：日本セラミックス協会ガラス部会
Transient Raman response and soliton self-frequency shift in tellurite microstructured fiber Reviewed

Xin Yan, Guanshi Qin, Meisong Liao, Takenobu Suzuki, Yasutake Ohishi

JOURNAL OF APPLIED PHYSICS 108 ( 12 ) 123110 - 1 2010.12 （ ISSN:0021-8979 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：AMER INST PHYSICS

We report on the Raman response function and the soliton self-frequency shift in a tellurite microstructured fiber pumped at 1557 nm. The Raman response function in a tellurite fiber quantifies a contribution of the Raman fraction to the nonlinear optical response. Continuous soliton wavelength shift from 1582 to 1851 nm is observed in a tellurite microstructured optical fiber with the length of 6.5 cm. The experimental results strongly correlated with the numerical simulations based on a generalized nonlinear Schrodinger equation. (c) 2010 American Institute of Physics. [doi: 10.1063/1.3525595]

DOI： 10.1063/1.3525595
フォスフォテルライトガラスを用いた微小球光共振器の作製と評価 Reviewed

塩坂 William 輝生*, 三好祥平*, 鈴木　健伸, 大石　泰丈

日本セラミックス協会東海支部学術研究発表会講演要旨集 35 2010.12

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YLF含有透明結晶化ガラスの創製 Reviewed

水野賢人*, 正木進一郎*, Takenobu Suzuki, 大石　泰丈

日本セラミックス協会東海支部学術研究発表会講演要旨集 41 2010.12

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Microstructured chalcogenide optical fibers from As₂S₃ glass: towards new IR broadband sources Reviewed

M. El-Amraoui ICB Laboratoire Interdisciplinaire Carnot de Bourgogne*, G. Gadret ICB Laboratoire Interdisciplinaire Carnot de Bourgogne*, I. Skripatchev Institute of Chemistry*, J. Troles Sciences Chimiques de Rennes*, L. Brilland PERFOS*, ガオウェイチン, Takenobu Suzuki, Yasutake Ohishi, F. Smektala ICB Laboratoire Interdisciplinaire Carnot de Bourgogne*, 他5名*

Optics Express 18 ( 25 ) 26655 - 26665 2010.12

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微細構造テーパーテルライト光ファイバによる広帯域スーパーコンティニュウム光の発生 Reviewed

鬼頭千尋*, Guanshi Qin*, シン　ヤン, メイソン　リャオ, 鈴木　健伸, 大石　泰丈, 森淳 NTTフォトニクス研究所*

日本セラミックス協会東海支部学術研究発表会講演要旨集 36 2010.12

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ErのNd添加ZBLANガラスにおける増感作用に関する研究 Reviewed

望月賢太*, 河井優幸*, 那須寛之*, 鈴木　健伸, 大石　泰丈, 水野真太郎豊田中央研究所*, 伊藤博豊田中央研究所*, 長谷川和男豊田中央研究所*

日本セラミックス協会東海支部学術研究発表会講演要旨集 37 2010.12

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光ファイバの誘導ラマン散乱を用いた光信号処理の研究 Reviewed

三好祥平*, 塩坂 William 輝生*, シン　ヤン, 鈴木　健伸, 大石　泰丈

日本セラミックス協会東海支部学術研究発表会講演要旨集 39 2010.12

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Nd³⁺添加テルライトガラスを用いた太陽光励起ファイバレーザの発振シミュレーション Reviewed

那須寛之*, 河井優幸*, 望月賢太*, 鈴木　健伸, 大石　泰丈, 水野真太郎豊田中央研究所*, 伊藤博豊田中央研究所*, 長谷川和男豊田中央研究所*

日本セラミックス協会東海支部学術研究発表会講演要旨集 40 2010.12

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Microstructured chalcogenide optical fibers from As2S3 glass: towards new IR broadband sources

M. El-Amraoui, G. Gadret, J. C. Jules, J. Fatome, C. Fortier, F. Desevedavy, I. Skripatchev, Y. Messaddeq, J. Troles, L. Brilland, W. Gao, T. Suzuki, Y. Ohishi, F. Smektala

OPTICS EXPRESS 18 ( 25 ) 26655 - 26665 2010.12 （ ISSN:1094-4087 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：OPTICAL SOC AMER

The aim of this paper is to present an overview of the recent achievements of our group in the fabrication and optical characterizations of As2S3 microstructured optical fibers (MOFs). Firstly, we study the synthesis of high purity arsenic sulfide glasses. Then we describe the use of a versatile process using mechanical drilling for the preparation of preforms and then the drawing of MOFs including suspended core fibers. Low losses MOFs are obtained by this way, with background level of losses reaching less than 0.5 dB/m. Optical characterizations of these fibers are then reported, especially dispersion measurements. The feasibility of all-optical regeneration based on a Mamyshev regenerator is investigated, and the generation of a broadband spectrum between 1 mu m and 2.6 mu m by femto second pumping around 1.5 mu m is presented. (C) 2010 Optical Society of America

DOI： 10.1364/OE.18.026655
Demonstration of Experimental Infrared Spectral Broadening in Chalcogenide As₂S₃ Suspended Core Microstructured Optical Fibers Reviewed

F. Smektala ICB Laboratoire InterdisciplinaireCarnot de Bourgogne*, M.El-Amraoui ICB Laboratoire InterdisciplinaireCarnot de Bourgogne*, J.C. Jules ICB Laboratoire InterdisciplinaireCarnot de Bourgogne*, Guanshi Qin*, Takenobu Suzuki, Yasutake Ohishi, C. Polacchini Instituto de Quimica*, G.Renversez Institut Fresnel*, M. Szuplak Institute of Physics Wroclaw University*, 他6名*

3rd International Congress on Ceramics S7-O11 2010.11

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Fabrication and characterization of tellurite air-clad fiber with controlled dispersion for supercontinuum generation Reviewed

メイソン　リャオ, シン　ヤン, Guanshi Qin*, Chitrarekha Chaudhari*, Takenobu Suzuki, Yasutake Ohishi

IEEE Photnics Society Annual Meeting 2010 506 - 507 2010.11

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Raman response function for tellurite fibers. Reviewed

シン　ヤン, Guanshi Qin*, メイソン　リャオ, Takenobu Suzuki, Yasutake Ohishi

IEEE Photonics Society Annual Meeting 2010 677 - 678 2010.11

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Quantum efficiency of Nd³⁺ -doped ZBLAN glass under sunlight excitation. Reviewed

Takenobu Suzuki, Hiroyuki Kawai*, Hiroyuki Nasu*, マーク　ヒューズ, Shintaro Mizuno Toyota Central Research and Development Labs., Inc.,*, Kazuo Hasegawa Toyota Central Research and Development Labs., Inc.,*, Hiroshi Ito Toyota Central Research and Development Labs., Inc.,*, Yasutake Ohishi

4th EPS-QEOD EUROPHOTON CONFERENCE, FWD-24 2010.9

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Energy transfer in ND, ER codoped fluoride glasses. Reviewed

Shintaro Mizuno Toyota Central Research and Development Labs., Inc.*, Hiroshi Ito Toyota Central Research and Development Labs., Inc*, Kazuo Hasegawa Toyota Central Research and Development Labs., Inc*, Hiroyuki Kawai*, Hiroyuki Nasu*, マーク　ヒューズ, Takenobu Suzuki, Yasutake Ohishi

XXII International Congress on Glass (Program and Book of Abstracts) 125 2010.9

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Energy transfer in ND, ER codoped fluoride glasses. Reviewed

Takenobu Suzuki, Shintaro Mizuno Toyota Central Research and Development Labs., Inc.*, Hiroshi Ito Toyota Central Research and Development Labs., Inc.*, Kazuo Hasegawa Toyota Central Research and Development Labs., Inc.*, Hiroyuki Kawai*, Hiroyuki Nasu*, マーク　ヒューズ, Yasutake Ohishi

XXII International Congress on Glass (Program and Book of Abstracts) 125 2010.9

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Quantum efficiency of ND³⁺ -doped glasses under sunlight excitation. Reviewed

Takenobu Suzuki, Hiroyuki Kawai*, Hiroyuki Nasu*, マーク　ヒューズ, Shintaro Mizuno Toyota Central Research and Development Labs., Inc.*, Hiroshi Ito Toyota Central Research and Development Labs., Inc.*, Kazuo Hasegawa Toyota Central Research and Development Labs., Inc.*, Yasutake Ohishi

XXII International Congress on Glass (Program and Book of Abstracts) 115 2010.9

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Spectroscopy of CR³⁺ , Nd³⁺ co-doped borosilicate glass: Towards a solar-energy-pumped laser gain medium Reviewed

マーク　ヒューズ, Shintaro Mizuno Toyota Central Research and Development Labs., Inc.*, Hiroshi Ito Toyota Central Research and Development Labs., Inc.*, Kazuo Hasegawa Toyota Central Research and Development Labs., Inc.*, Takenobu Suzuki, Yasutake Ohishi

XXII International Congress on Glass (Program and Book of Abstracts) 103 2010.9

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Preparation of novel transparent glass-ceramics containing fluoride crystals. Reviewed

Takenobu Suzuki, Shin-ichiro Masaki*, Kento Mizuno*, Yasutake Ohishi

XXII International Congress on Glass (Program and Book of Abstracts) 115 2010.9

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Ultrawide Mid-Infrared Supercontinuum Generation in an As₂S₃-Based Chalcogenide Core Microstructured Fiber Reviewed

シン　ヤン, Guanshi Qin*, メイソン　リャオ, Takenobu Suzuki, Yasutake Ohishi

4th EPS-QEOD Europhoton Conference 2010.8

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Supercontinuum Generation by Tellurite Microstructured Fiber Under the Pump of a Picosecond Fiber Laser Reviewed

メイソン　リャオ, Guanshi Qin*, シン　ヤン, Takenobu Suzuki, Yasutake Ohishi

4th EPS-QEOD Europhoton Conference, FWD30 2010.8

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Ultra-wide band Composite Chalcogenide-Tellurite Microstructured Fiber Parametric Amplifier Driven by Dual Wavelength Pump Reviewed

Chitrarekha Chaudhari*, Takenobu Suzuki, Yasutake Ohishi

4th EPS-QEOD Europhoton Conference, FWD-69 2010.8

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Spectroscopy of bismuth-doped lead-aluminum-germanate glass and yttrium-aluminum-silicate glass Reviewed

マーク　ヒューズ, Takenobu Suzuki, Yasutake Ohishi

Journal of Non-Crystalline Solids 356 2302 - 2309 2010.8

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Quantum efficiencies of Nd³⁺-doped glasses under sunlight: Towards solar pumped fiber lasers. Reviewed

Takenobu Suzuki, Hiroyuki Kawai*, Hiroyuki Nasu*, マーク　ヒューズ, Shintaro Mizuno Toyota Central Research and Development Labs., Inc.*, Hiroshi Ito Toyota Central Research and Development Labs., Inc.*, Kazuo Hasegawa Toyota Central Research and Development Labs., Inc.*, Yasutake Ohishi

STAC-4 ABSTRACT 2010.7

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Widely Tunable Narrowband Soliton Source Generation in Tellurite Microstructured Fibers. Reviewed

Guanshi Qin*, シン　ヤン, Chihiro Kito*, メイソン　リャオ, Takenobu Suzuki, Atsushi Mori NTT Photonics Laboratories*, Yasutake Ohishi

Nonlinear Photonics, OSA Technical Digest, NME17 2010.7

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Parametric Amplification in Composite Chalcogenide - Tellurite Microstructured Fiber Reviewed

Chitrarekha Chaudhari*, Takenobu Suzuki, Yasutake Ohishi

15th OptoElectronics and Communications Conference Technical Digest 652 - 653 2010.7

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Evaluating upconversion materials developed to improve the efficiency of solar cells: comment Reviewed

Meisong Liao, Guanshi Qin, Xin Yan, Mark Hughes, Takenobu Suzuki, Yasutake Ohishi

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS 27 ( 7 ) 1352 - 1355 2010.7 （ ISSN:0740-3224 ）

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The upconversion efficiency depends on the pump power density. Materials exhibiting a high upconversion efficiency under high pump power density do not necessarily have a reasonable upconversion efficiency under the pump power density around that of the concentrated sunlight. Also, materials which have an upconversion efficiency not so high under high pump power density do not necessarily have no practical upconversion efficiency under the pump power density of concentrated sunlight. To avoid the inconveniences in measuring the upconversion efficiency under the pump power density of concentrated sunlight which is very weak, a method which can evaluate the significance of upconversion materials for solar cells is proposed. (C) 2010 Optical Society of America

DOI： 10.1364/JOSAB.27.001352
Soliton Source generation by higher-order mode excitation in tellurite microstructured fiber Reviewed

シン　ヤン, Guanshi Qin*, メイソン　リャオ, Takenobu Suzuki, Atsushi Mori NTT Photonics Laboratories*, Yasutake Ohishi

15th OptoElectronics and Communications Conference Technical Digest 308 - 309 2010.7

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A highly nonlinear tellurite microstructured fiber pumped by picosecond pulse for supercontinuum generation Reviewed

メイソン　リャオ, Chitrarekha Chaudhari*, Guanshi Qin*, シン　ヤン, Takenobu Suzuki, Yasutake Ohishi

15th OptoElectronics and Communications Conference Technical Digest 160 - 161 2010.7

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RAMAN CHARACTERISTICS OF PHOSPHO-TELLURITE GLASS AS AN ULTRABROAD RAMAN GAIN MEDIUM Reviewed

Takenobu Suzuki, Teruo William Shiosaka*, Shohei Miyoshi*, Yasutake Ohishi

Program and Abstracts 165 2010.7

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Fabrication of Tellurite and Phospho-Tellurite Glass Composite Microstructured Optical Fiber Reviewed

Chihiro Kito*, Shinya Uechi*, シン　ヤン, メイソン　リャオ, Takenobu Suzuki, Yasutake Ohishi

15th OptoElectronics and Communications Conference Technical Diget 158 - 159 2010.7

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High quantum efficiency of Nd³⁺-doped tellurite glass under sun excitation Reviewed

Hiroyuki Nasu*, Hiroyuki Kawai*, マーク　ヒューズ, Takenobu Suzuki, Yasutake Ohishi, Shintaro Mizuno Toyota Central Research and Development Labs., Inc.*, Hiroshi Ito Toyota Central Research and Development Labs., Inc.*, Kazuo Hasegawa Toyota Central Research and Development Labs., Inc.*, Koji Shikano Hakodate National College of Technology*

15th OptoElectronics and Communications Conference Technical Digest 624 - 625 2010.7

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Quantum efficiency measurements on Nd-doped glasses for solar pumped lasers Reviewed

Takenobu Suzuki, Hiroyuki Nasu*, マーク　ヒューズ, Shintaro Mizuno Toyota Central Research and Development Labs., Inc.*, Kazuo Hasegawa Toyota Central Research and Development Labs., Inc.*, Hiroshi Ito Toyota Central Research and Development Labs., Inc.*, Yasutake Ohishi

Journal of Non-Crystalline Solids 356 2344 - 2349 2010.6

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Controlling the chromatic dispersion of soft glass highly nonlinear fiber through complex microstructure. Reviewed

メイソン　リャオ, シン　ヤン, Guanshi Qin*, Chitrarekha Chaudhari*, Takenobu Suzuki, Yasutake Ohishi

Journal of Non-Crystalline Solids 356 2613 - 2617 2010.6

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Synthesis and Luminescent Properties of Transparent Oxyfluoride Glass-Ceramics Containing Er³⁺ :YLiF₄ Nanocrystals Reviewed

Takenobu Suzuki, Shin-ichiro Masaki*, Kento Mizuno*, Yasutake Ohishi

Applied Physics Express 3 072601 - 1 2010.6

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Zero-dispersion Wavelength Decreasing Tellurite Microstructured Fiber for Wide and Flattened Supercontinuum Generation. Reviewed

Guanshi Qin*, シン　ヤン, Chihiro Kito*, メイソン　リャオ, Takenobu Suzuki, Atsushi Mori NTT Photonics Laboratories*, Yasutake Ohishi

Conference on Lasers and Electro-Optics, OSA Technical Digest, CMGG3 2010.5

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High quantum efficiency of Nd³⁺-doped ZBLAN glass under sunlight excitation Reviewed

Takenobu Suzuki, Hiroyuki Kawai*, Hiroyuki Nasu*, Mark Hughes*, Yasutake Ohishi, Shintaro Mizuno Toyota Central Research and Development Labs., Inc.*, Hiroshi Ito Toyota Central Research and Development Labs., Inc.*, Kazuo Hasegawa Toyota Central Research and Development Labs., Inc.*

Conference on Lasers and Electro-Optics, OSA Technical Digest, JtuD62 2010.5

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Second and Third Harmonics Generation in Tellurite Microstructured Fibers Reviewed

Guanshi Qin*, メイソン　リャオ, Chihiro Kito*, シン　ヤン, Takenobu Suzuki, Yasutake Ohishi

Conference on Lasers and Electro-Optics, OSA Technical Digest, JtuD55 2010.5

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A Suspended core nanofiber with unprecedented large diameter ratio of holey region to core Reviewed

メイソン　リャオ, Chitrarekha Chaudhari*, シン　ヤン, Guanshi Qin*, Chihiro Kito*, Takenobu Suzuki, Yasutake Ohishi

Optics Express 18 ( 8 ) 9088 - 9097 2010.4

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Spectroscopic properties of bismuth-doped silicate glasses for ultra-broadband near-infrared gain media Reviewed

Yusuke Arai, Takenobu Suzuki, Yasutake Ohishi

GLASS TECHNOLOGY-EUROPEAN JOURNAL OF GLASS SCIENCE AND TECHNOLOGY PART A 51 ( 2 ) 86 - 88 2010.4 （ ISSN:1753-3546 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：SOC GLASS TECHNOLOGY

Spectroscopic properties of 0.1-5.0 mol% Bi(2)O(3)-doped lithium aluminosilicate (Bi-LAS) glasses for ultra-broadband near-infrared gain media have been investigated. Broad emissions, more than 500 nm full width at half maximum (FWHM), were observed from each Bi-LAS glass studied. Bismuth concentration and excitation wavelength affected the spectral profiles of the Bi-LAS glasses. The emission bands shifted toward longer wavelengths with increasing the Bi(2)O(3) contents. The broadest emission, which covered the range 950-1700 nm, was realized when the 5.0 Bi-LAS glass was excited at 920 nm. The emission consisted of three Gaussian peaks, and the products of the stimulated emission cross section and the lifetime, sigma(em)tau, for the peaks were 17x10(-23), 9.0x10(-24) and 3.9x10(-24) cm(2)s. These high sigma(em)tau values indicate that Bi-LAS glasses have significant potential as novel broadband gain media for amplifiers and tunable lasers.
Novel oxyfluoride glass and transparent glass-ceramics for fiber lasers and fiber amplifiers Reviewed

Takenobu Suzuki, Shin-ichiro Masaki*, Kento Mizuno*, Yasutake Ohishi

Proceedings of SPIE 7721 77210T - 1 2010.4

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The tellurite highly nonlinear microstructured fibers for THG and SC generations Reviewed

メイソン　リャオ, Chitrarekha Chaudhari*, Guanshi Qin*, シン　ヤン, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 7714 77140C - 1 2010.4

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Evaluating upconversion materials developed to improve the efficiency of solar cells Reviewed

メイソン　リャオ, Guanshi Qin*, シン　ヤン, マーク　ヒューズ, Takenobu Suzuki, Yasutake Ohishi

Program and Abstract 82 2010.4

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Tunable passively mode-locked fiber laser with carbon nanotube films and its application to supercontinuum generation in tellurite microstructured fibers Reviewed

Guanshi Qin*, メイソン　リャオ, シン　ヤン, Takenobu Suzuki, Yasutake Ohishi

Program and Abstract 83 2010.4

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Spectroscopy of titanium doped magnesium-aluminum-silicate glass and glass-ceramics. Reviewed

マーク　ヒューズ, Takenobu Suzuki, Yasutake Ohishi

Program and Abstracts 109 2010.4

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Single and Dual Wavelength Pumped Composite Chalcogenide-Tellurite Microstructured Fiber Parametric Amplifier Reviewed

Chitrarekha Chaudhari*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE 7728 77281O - 1 2010.4

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Ultrabroadband supercontinuum generation from ultraviolet to 6.28 mu m in a fluoride fiber (vol 95, 161103, 2009)

Guanshi Qin, Xin Yan, Chihiro Kito, Meisong Liao, Chitrarekha Chaudhari, Takenobu Suzuki, Yasutake Ohishi

APPLIED PHYSICS LETTERS 96 ( 14 ) 2010.4 （ ISSN:0003-6951 ）

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DOI： 10.1063/1.3386533
Towards a high-performance optical gain medium based on bismuth and aluminum co-doped germnanate glass Reviewed

マーク　ヒューズ, Takenobu Suzuki, Yasutake Ohishi

Journal of Non-Crystalline Solids 356 407 - 418 2010

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Second and third harmonics and flattened supercontinuum generation in tellurite microstructured fibers Reviewed

Guanshi Qin*, メイソン　リャオ, C. Chaudhari*, シン　ヤン, C. Kito*, Takenobu Suzuki, Yasutake Ohishi

Optics Letters 35 ( 1 ) 58 - 60 2010

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Compositional optimization of bismuth-doped yttria–alumina–silica glass Reviewed

マーク　ヒューズ, Takenobu Suzuki, Yasutake Ohishi

Optical Materials 32 368 - 373 2010

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Zero-dispersion Wavelength Decreasing Tellurite Microstructured Fiber for Wide and Flattened Supercontinuum Generation Reviewed

Guanshi Qin, Xin Yan, Chihiro Kito, Meisong Liao, Takenobu Suzuki, Atsushi Mori, Yasutake Ohishi

2010 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) AND QUANTUM ELECTRONICS AND LASER SCIENCE CONFERENCE (QELS) 35 ( 2 ) 136 - 138 2010 （ ISSN:0146-9592 ）

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We demonstrate wide and flattened supercontinuum generation in zero-dispersion wavelength decreasing tellurite microstructured fibers fabricated by using the tapering method. (C)2010 Optical Society of America.

DOI： 10.1364/OL.35.000136
Compositional dependence of the optical properties of bismuth doped lead-aluminum-germanate glass Reviewed

マーク　ヒューズ, Takenobu Suzuki, Yasutake Ohishi

Optical Materials 32 1028 - 1034 2010

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Highly nonlinear tellurite microstructured fibers for broadband wavelength conversion and flattened supercontinuum generation. Reviewed

G. Qin*, シン　ヤン, C. Kito*, メイソン　リャオ, Takenobu Suzuki, Yasutake Ohishi

Journal of Applied Physics 107 ( 043108 ) 2010

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Optical Parametric Amplification in Composite Tellurite - Fluorophosphate Fiber Reviewed

Chitrarekha Chaudhari, Takenobu Suzuki, Yasutake Ohishi

OPTICAL COMPONENTS AND MATERIALS VII 7598 2010 （ ISSN:0277-786X ）

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We present the design, dispersion calculations and tailoring, and simulation of the parametric gain in the composite tellurite-fluorophosphate glass fiber. The fiber has the tellurite core subsequently surrounded by fluorophosphate and tellurite claddings. Thermal properties of the tellurite and fluorophosphate glasses match, depicting the feasibility of the fabrication of the fiber under controlled environment. The composite fiber introduced here has the advantage of easy handling over the fiber tapers or the air cladding tellurite nanofibers. With our analysis we observe that the fluorophosphate and the tellurite cladding thickness along-with the fiber core diameter, have control on the dispersion and the parametric gain. The wavelength band, over which the dispersion is anomalous, increases with increasing tellurite core diameter. For longer wavelengths, increasing the fluorophosphate cladding thickness causes increase in the anomalous dispersion bandwidth and further flattening of the dispersion curve. The slope of the dispersion curve near the zero dispersion wavelength (ZDWL) is greatly reduced for thicker outer tellurite ring claddings. It is possible to design zero flattened dispersion fiber or the fiber providing two ZDWLs in the communication band, which can generate broadband parametric amplification. The gain obtained has strong bandwidth dependence on the dispersion slope. We study the effects of the fiber length, pump power, and pump detuning from the ZDWL, on the parametric amplification. With multiple pumping with proper selection of the pump wavelengths, the parametric amplification process can generate ultra flat, broadband amplifiers as the dispersion provided by the composite fiber is anomalous over a wide bandwidth.

DOI： 10.1117/12.840587
Ultraflat Supercontinuum Generation in an As(2)S(3)-based Chalcogenide Core Microstructured Fiber Reviewed

Xin Yan, Chitrarekha Chaudhari, Guanshi Qin, Meisong Liao, Takenobu Suzuki, Yasutake Ohishi

OPTICAL COMPONENTS AND MATERIALS VII 7598 2010 （ ISSN:0277-786X ）

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We propose a chalcogenide (As(2)S(3)) core tellurite cladding microstructured fiber with flattened normal dispersion for ultraflat supercontinuum (SC) generation. To realize flattened normal dispersion, the structure parameters are optimized such as the chalcogenide core diameter, the air hole diameter and the distance between the centers of the two neighboring air holes. The ultraflat normal dispersion curve is obtained and the pulse propagation is investigated using a nonlinear Schrodinger equation. It is shown that an ultraflat SC spectrum with deviations less than 4 dB over an octave (from 1400 nm to 3000 nm) can be achieved by the illumination of a pulsed light with a pulse width of 200 fs, central wavelength of 2000 nm and peak power of 1000 W.

DOI： 10.1117/12.840575
Ultra-broadband supercontinuum generation from ultraviolet to 6.28 mu m in a fluoride fiber Reviewed

Guanshi Qin, Xin Yan, Chihiro Kito, Meisong Liao, Chitrarekha Chaudhari, Takenobu Suzuki, Yasutake Ohishi

2010 CONFERENCE ON OPTICAL FIBER COMMUNICATION OFC COLLOCATED NATIONAL FIBER OPTIC ENGINEERS CONFERENCE OFC-NFOEC 2010

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We demonstrate ultra-broadband SC generation from UV to 6.28 mu m in a 2-cm-long fluoride fiber pumped by a 1450 nm femtosecond laser. (C) 2010 Optical Society of America.
Soliton source generation in a few-mode tellurite microstructure fiber

Xin Yan, Guanshi Qin, Meisong Liao, Takenobu Suzuki, Atsushi Mori, Yasutake Ohishi

APPLIED PHYSICS LETTERS 95 ( 17 ) 171107 2009.10 （ ISSN:0003-6951 ）

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We report broad near-infrared soliton and associated dispersive wave source generation (1228-1867 nm) and tunable green third harmonic generation (528-542 nm) by LP(11) mode excitation in a few-mode tellurite microstructure fiber pumped by a 1557 nm femtosecond fiber laser. The fiber presents a wide range of wavelengths in which the fundamental mode experiences normal dispersion, whereas the higher-order modes propagate in the anomalous dispersion regime. LP(01) or LP(11) mode can be selectively excited, and obviously different spectra are obtained based on the different mechanisms of supercontinuum generation. (C) 2009 American Institute of Physics. [doi: 10.1063/1.3254238]

DOI： 10.1063/1.3254238
Supercontinuum generation spanning over three octaves from UV to 3.85 mu m in a fluoride fiber Reviewed

Guanshi Qin, Xin Yan, Chihiro Kito, Meisong Liao, Chitrarekha Chaudhari, Takenobu Suzuki, Yasutake Ohishi

OPTICS LETTERS 34 ( 13 ) 2015 - 2017 2009.7 （ ISSN:0146-9592 ）

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We report what we believe to be the first demonstration of supercontinuum generation spanning over three octaves from UV (at least similar to 350 nm) to 3.85 mu m in a 2.5-cm-long fluoride fiber pumped by a 1,450 nm femtosecond laser. The spectral broadening in the fluoride fiber is caused primarily by self-phase modulation. Its performance is also compared with that of a 2.5-cm-long silica fiber pumped by the same laser. (C) 2009 Optical Society of America
Upconversion properties of Tb3+-Yb3+ codoped fluorophosphate glasses

Yusuke Arai, Tatsuya Yamashidta, Takenobu Suzuki, Yasutake Ohishi

JOURNAL OF APPLIED PHYSICS 105 ( 8 ) 083105 2009.4 （ ISSN:0021-8979 ）

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Tb3+-Yb3+ codoped fluorophosphate glasses were synthesized and properties of the visible emission at 0.54 mu m were investigated. The upconversion excitation efficiency from Yb3+ to Tb3+ was studied by evaluation of the cooperative energy transfer efficiency from Yb3+ to Tb3+ (eta(CET)) and the back-transfer efficiency from Tb3+ to Yb3+(eta(BT)), which gave a positive and negative contribution to upconversion excitation, respectively. The eta(CET) was as high as 30% and the eta(BT) was less than 1% in the fluorophosphate glass. This indicates that Tb3+-Yb3+ codoped fluorophosphate glass is promising as laser and gain medium in the 0.54 mu m band.

DOI： 10.1063/1.3112010
Relaxation process of the I-4(13/2) level of Er3+ in a borosilicate glass Reviewed

Meisong Liao, Tatsuya Yamashita, Lihui Huang, Yusuke Arai, Takenobu Suzuki, Yasutake Ohishi

JOURNAL OF NON-CRYSTALLINE SOLIDS 355 ( 2 ) 96 - 100 2009.1 （ ISSN:0022-3093 ）

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Relaxation of 1.54 mu m emission of the erbium doped borosilicate glasses with high rare earth solubility was investigated. When the erbium content is less than 0.2 wt%. multi-phonon relaxation is the predominant process of non-radiative relaxation. It is difficult to increase the quantum efficiency higher than 70% for erbium ions in this glass clue to multi-phonon relaxation. Because of the good glass-formation ability and high rare earth solubility, this glass will be suitable as a host for rare earth ions with a large energy gap, such as Yb3+, Eu3+ or Tb3+. (c) 2008 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.jnoncrysol.2008.10.008
Widely tunable passively mode-locked fiber laser with carbon nanotube films Reviewed

Guanshi Qin, Takenobu Suzuki, Yasutake Ohishi

2009 14TH OPTOELECTRONICS AND COMMUNICATIONS CONFERENCE (OECC 2009) 352 - 353 2009

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We demonstrate a widely tunable passively mode-locked fiber laser covering the C+L band with carbon-nanotube films, which shows that the saturable absorber incorporating nanotubes has potential for constructing widely tunable passively mode-locked fiber laser.
Recent Progress in Tellurite Fibers Reviewed

Yasutake Ohishi, G. Qin*, メイソン　リャオ, シン　ヤン, Takenobu Suzuki

OFC/NFOEC 2010, OMG1 2009

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Ultra-Broadband Supercontinuum Generation from Ultraviolet to 6.28 μm in a Fluoride Fiber Reviewed

G. Qin*, シン　ヤン, C. Kito*, メイソン　リャオ, C. Chaudhari*, Takenobu Suzuki, Yasutake Ohishi

OFC/NFOEC 2010, OMG1 2009

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Optical parametric amplification in composite tellurite: fluorophosphate fiber Reviewed

C. Chaudhari*, Takenobu Suzuki, Yasutake Ohishi

Photonics West,75981N1-8 2009

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The efficiencies of energy transfer from Cr to Nd ions in silicate glasses Reviewed

S. Mizuno*, H. Nasu*, マーク　ヒューズ, Takenobu Suzuki, H. Ito*, Yasutake Ohishi

Photonics West,75980A-1-8 2009

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Excitation wavelength dependence of quantum efficiencies of Nd-doped glasses for solar pumped fiber lasers Reviewed

Takenobu Suzuki, H. Nasu*, マーク　ヒューズ, S. Mizuno*, Yasutake Ohishi

Photonics West 75980A ( 1 ) 8 2009

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Ultraflat supercontinuum generation in an As2S3-based chalcogenide core microstructure fiber Reviewed

シン　ヤン, C. Chaudhari*, G. Qin*, メイソン　リャオ, Takenobu Suzuki, Yasutake Ohishi

Photonics West 75980A ( 1 ) 8 2009

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Supercontinuum Generation in a Chalcogenide-Tellurite Composite Microstructure Fiber Reviewed

Meisong Liao, Chitrarekha Chaudhari, Guanshi Qin, Xin Yan, Chihiro Kito, Takenobu Suzuki, Yasutake Ohishi, Morio Matsumoto, Takashi Misumi

2009 35TH EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC) 2009

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Language：English Publishing type：Research paper (international conference proceedings) Publisher：VDE VERLAG GMBH

A supercontinuum spectrum covering 800-2400 nm was generated by a chalcogenide-tellurite composite microstructure fiber, which was designed to have a high nonlinear coefficient together with a flattened chromatic dispersion in the near infrared range.
Supercontinuum Generation from UV to 3.85 μm in a Fluoride Fiber Reviewed

G. Qin*, シン　ヤン, C. Kito*, メイソン　リャオ, C. Chaudhari*, Takenobu Suzuki, Yasutake Ohishi

ECOC 2009 2009

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Tunable all-optical pulse compression and stretching via doublet Brillouin gain lines in an optical fiber Reviewed

G. Qin*, T. Sakamoto*, N. Yamamoto*, T. Kawanishi*, H. Sotobayshi*, Takenobu Suzuki, Yasutake Ohishi

CLEO Europe 2009, Munich, cd.p.1-tue 2009

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Brillouin lasing of a single mode tellurite fiber Reviewed

G. Qin*, Takenobu Suzuki, Yasutake Ohishi

CLEO Europe 2009, cd.p.3-tue 2009

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Composite tellurite - Fluorophosphate fiber for parametric amplification Reviewed

Chitrarekha Chaudhari, Takenobu Suzuki, Yasutake Ohishi

CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference 2009 （ ISBN:9781424440801 ）

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DOI： 10.1109/CLEOE-EQEC.2009.5192745
Group Velocity Dispersion in Composite Tellurite - Fluorophosphate Fiber Reviewed

Chitrarekha Chaudhari, Meisong Liao, Takenobu Suzuki, Yasutake Ohishi

Conference on Lasers and Electro-Optics/International Quantum Electronics Conference 2009

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Publishing type：Research paper (international conference proceedings) Publisher：OSA

DOI： 10.1364/cleo.2009.jtud66
Zero-broadening and pulse compression Brillouin slow light based on doublet gain lines in an optical fiber Reviewed

Guanshi Qin, Takenobu Suzuki, Yasutake Ohishi

2009 CONFERENCE ON LASERS AND ELECTRO-OPTICS AND QUANTUM ELECTRONICS AND LASER SCIENCE CONFERENCE (CLEO/QELS 2009), VOLS 1-5 3107 - 3108 2009

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Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

We numerically demonstrate zero-broadening and pulse compression Brillouin slow light based on doublet gain lines in an optical fiber. (C) 2009 Optical Society of America.
Fabrication of a highly nonlinear tellurite complex microstructure fiber for supercontinuum generation Reviewed

メイソン　リャオ, シン　ヤン, G. Qin*, C. Chaudhari*, Takenobu Suzuki, Yasutake Ohishi

OFC/NFOEC 2010,JWA3 2009

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A highly nonlinear fiber with chalcogenide-tellurite composite microstructure Reviewed

Meisong Liao, Chitrarekha Chaudhari, Guanshi Qin, Chihiro Kito, Takenobu Suzuki, Yasutake Ohishi, Morio Matsumoto, Takashi Misumi

2009 14TH OPTOELECTRONICS AND COMMUNICATIONS CONFERENCE (OECC 2009) TuA3 538 - + 2009

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Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

A highly nonlinear microstructure fiber with As2S3 glass core and tellurite glass clad has been fabricated successfully by the method of stack and draw. The nonlinear coefficient is 12961 km(-1)W(-1) at 1.55 mu m.
Lightwave Signal Processing Using Tellurite Fibers Reviewed

Yasutake Ohishi, Guanshi Qin, Meisong Liao, Chitrarekha Chaudhari, Takenobu Suzuki

2009 14TH OPTOELECTRONICS AND COMMUNICATIONS CONFERENCE (OECC 2009) TuD1 568 - 569 2009

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Tellurite glasses are known as one of highly nonlinear fiber materials. We shows new potential of tellurite fibers as lightwave signal processing media by demonstrating applications of stimulated Raman and Brillouin scattering, and supercontinuum generation.
Dispersion Tailoring of the Composite Chalcogenide-Tellurite Microstructured Fiber Reviewed

C. Chaudhari*, Takenobu Suzuki, Yasutake Ohishi

ISSS&AMDE2009, 2L01 2009

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Quantum efficiency measurements on Nd-doped glasses for solar pumped lasers Reviewed

Takenobu Suzuki, H. Nasu*, マーク　ヒューズ, S. Mizuno*, K. Hasegawa*, Yasutake Ohishi

9th International Symposium on Crystallization in Glasses and Liquids 2009

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Relaxation process of the 4I13/2 level of Er3+ in a borosilicate glass Reviewed

メイソン　リャオ, T. Yamashita*, L. Huang*, Y. Arai*, Takenobu Suzuki, Yasutake Ohishi

Journal of Non-Crystalline Solids 355 ( 2 ) 96 - 100 2009

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Dispersion flattened tellurite microstructure fibers for broadband lightwave processing Reviewed

メイソン　リャオ, C. Chaudhari*, G. Qin*, C. Kito*, Takenobu Suzuki, Yasutake Ohishi

9th International Symposium on Crystallization in Glasses and Liquids 2009

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Spectroscopy of bismuth-doped lead-aluminum-germanate glass and yttrium-aluminum-sillicate glass Reviewed

マーク　ヒューズ, Takenobu Suzuki, Yasutake Ohishi

9th International Symposium on Crystallization in Glasses and Liquids 2009

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Improvement of NIR emission quantum efficiencies of Nd, Cr-copded glasses for solar pumped lasers Reviewed

S. Mizuno*, K. Hasegawa*, H. Ito*, H. Nasu*, マーク　ヒューズ, Takenobu Suzuki, Yasutake Ohishi

9th International Symposium on Crystallization in Glasses and Liquids 2009

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Optical properties of Ni-doped MgGa2O4 single crystals grown by floating zone method, Reviewed

Takenobu Suzuki, マーク　ヒューズ, Yasutake Ohishi

Journal of Luminescence 130 121 - 126 2009

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Highly Nonlinear Chalcogenide Core Nanofiber and Photonic Crystal Fiber Showing Zero Dispersion at 1.55 μm Reviewed

C. Chaudhari*, Takenobu Suzuki, Yasutake Ohishi

Proc. of SPIE 7357 735703 - 1 2009

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Effect of Cladding Layer Thickness on Dispersion and Nonlinearity of the Chalcogenide Core - Tellurite Cladding Composite Nanofiber Reviewed

Chitrarekha Chaudhari, Takenobu Suzuki, Yasutake Ohishi

2009 IEEE LEOS ANNUAL MEETING CONFERENCE PROCEEDINGS, VOLS 1AND 2 725 - 726 2009 （ ISSN:1092-8081 ）

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Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

We present the design for the chalcogenide nanofiber coated with a thin finite tellurite cladding. The effects of the thickness of the tellurite coating on the dispersion and the nonlinearity of the nanofiber are studied.
Tunable green third harmonics and near infrared soliton (or dispersive wave) source generation in tellurite microstructure fibers Reviewed

Guanshi Qin, Xin Yan, Meisong Liao, Takenobu Suzuki, Atsushi Mori, Yasutake Ohishi

2009 IEEE LEOS ANNUAL MEETING CONFERENCE PROCEEDINGS, VOLS 1AND 2 757 - 758 2009 （ ISSN:1092-8081 ）

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We demonstrate widely tunable green (528-542 nm) third harmonics and near infrared (1228-1867 nm) soliton (or dispersive wave) source generation in tellurite microstructure fibers.
Second, Third Harmonics and Flattened Supercontinuum Generation in Tellurite Microstructure Fibers Reviewed

Guanshi Qin, Meisong Liao, Chitrarekha Chaudhari, Xin Yan, Chihiro Kito, Takenobu Suzuki, Yasutake Ohishi

2009 IEEE LEOS ANNUAL MEETING CONFERENCE PROCEEDINGS, VOLS 1AND 2 395 - 396 2009 （ ISSN:1092-8081 ）

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We report what we believe to be the first demonstration of the second, third harmonics and flattened supercontinuum generation in tellurite microstructure fibers pumped he a 1557 mm femtosecond fiber laser.
Ultrabroad emission from a bismuth doped chalcogenide glass Reviewed

マーク　ヒューズ, T. Akada*, Takenobu Suzuki, Yasutake Ohishi, D. W. Hewak*

Optics Express 17 ( 22 ) 19345 - 19355 2009

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Ultrabroadband supercontinuum generation from ultraviolet to 6.28 μm in a fluoride fiber Reviewed

G. Qin*, シン　ヤン, C. Kito*, メイソン　リャオ, C. Chaudhari*, Takenobu Suzuki, Yasutake Ohishi

Applied Physics Letters 95 ( 161103 ) 1 - 3 2009

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Soliton source generation in - few-mode tellurite microstructure fiber Reviewed

シン　ヤン, Guanshi Qin*, メイソン　リャオ, Takenobu Suzuki, A. Mori*, Yasutake Ohishi

Applied Physics Letters 95 ( 171107 ) 1 - 3 2009

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A highly non-linear tellurite microstructure fiber with multi-ring holes for supercontinuum generation Reviewed

メイソン　リャオ, シン　ヤン, Guanshi Qin*, C. Chaudhari*, Takenobu Suzuki, Yasutake Ohishi

Optics Express 17 ( 18 ) 15481 - 15490 2009

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Fabrication and characterization of a chalcogenide-tellurite composite microstructure fiber with high nonlinearity Reviewed

メイソン　リャオ, C. Chaudhari*, Guanshi Qin*, シン　ヤン, C. Kito*, Takenobu Suzuki, Yasutake Ohishi, M. Matsumoto*, T. Misumi*

Optics Express 17 ( 24 ) 21608 - 21614 2009

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Tellurite microstructure fibers with small hexagonal core for supercontinuum generation Reviewed

メイソン　リャオ, C. Chaudhari*, Guanshi Qin*, シン　ヤン, Takenobu Suzuki, Yasutake Ohishi

Optics Express 17 ( 14 ) 12174 - 12182 2009

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Upconversion properties of Tb3+–Yb3+ codoped fluorophosphate glasses Reviewed

Y. Arai*, T. Yamashita*, Takenobu Suzuki, Yasutake Ohishi

Journal of Applied Physics 105 083105 - 1 2009

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Correlation between near infrared emission and bismuth radical species of Bi2O3-containing aluminoborate glass Reviewed

H. Masai*, Y. Takahashi*, T. Fujiwara*, Takenobu Suzuki, Yasutake Ohishi

Journal of Applied Physics 106 103523 - 1 2009

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Relaxation process of the 4I13/2 level of Er3+ in a borosilicate glass Reviewed

メイソン　リャオ, T. Yamashita*, L. Huang*, Y. Arai*, Takenobu Suzuki, Yasutake Ohishi

Journal of Non-Crystalline Solids 355 96 - 100 2009

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Spectrum controlled supercontinuum generation in microstructure tellurite fibers Reviewed

Guanshi Qin*, メイソン　リャオ, C. Chaudhari*, Y. Arai*, Takenobu Suzuki, Yasutake Ohishi

Journal of the Ceramic Society of Japan 117 ( 5 ) 706 - 708 2009

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Design of Zero Chromatic Dispersion Chalcogenide As2S3 Glass Nanofibers Reviewed

C. Chaudhari*, Takenobu Suzuki, Yasutake Ohishi

Journal of Lightwave Technology 27 ( 12 ) 2095 - 2099 2009

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Tunable all-optical pulse compression and stretching via doublet Brillouin gain lines in an optical fiber Reviewed

Guanshi Qin*, T. Sakamoto*, N. Yamamoto*, T. Kawanishi*, H. Sotobayashi*, Takenobu Suzuki, Yasutake Ohishi

Optics Letters 34 ( 8 ) 1192 - 1194 2009

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Supercontinuum generation spanning over three octaves from UV to 3.85μm in a fluoride fiber Reviewed

Guanshi Qin*, シン　ヤン, C. Kito*, メイソン　リャオ, C. Chaudhari*, Takenobu Suzuki, Yasutake Ohishi

Optics Letters 34 ( 13 ) 2015 - 2017 2009

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Towards a high-performance optical gain medium based on bismuth and aluminum co-doped germanate glass Reviewed

マーク　ヒューズ, Takenobu Suzuki, Yasutake Ohishi

Journal of Non-Crystalline Solids 356 407 - 418 2009

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Highly Nonlinear Chalcogenide Core Nanofiber and Photonic Crystal Fiber Showing Zero Dispersion at 1.55 mu m Reviewed

Chitrarekha Chaudhari, Takenobu Suzuki, Yasutake Ohishi

PHOTONIC CRYSTAL FIBERS III 7357 2009 （ ISSN:0277-786X ）

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We present the design of the chalcogenide (As2S3) glass nanofibers with the nonlinear tellurite glass as the cladding material. Both of these glasses have high nonlinearity. We show that the simple step index structure with tellurite cladding has the normal dispersion in the telecommunication window for any value of the core diameter, ranging from the sub-wavelength size to a few micro-meters. The dispersion achieved is flat so as to be applicable to dispersion compensating devices. However, the dispersion can not be tailored to zero. So we propose the photonic crystal fiber (PCF) structure, which has six circular identical air holes introduced in the tellurite cladding around the chalcogenide core. The air holes introduced cause the decrease in the effective cladding index. This structure shows anomalous dispersion in the telecommunication band with two zero dispersion wavelengths. With further optimization the structure can show zero flattened dispersion. We study the effect of the various design parameters - the chalcogenide core diameter, the air hole diameter, and the pitch, that is the distance between the centers of two neighbouring air holes, which is same as the distance between the center of the core and any of the air holes. We optimize the design to achieve zero slope (flattened) at the zero dispersion wavelength, 1.55 mu m. The thermal characteristics of tellurite glass match with the chalcogenide making the fabrication of the chalcogenide core PCF with the tellurite glass as a cladding material feasible. We also present the calculation of the nonlinearity of the PCF.

DOI： 10.1117/12.820426
Spectroscopic properties of Tb(3+)-doped borosilicate glasses for new green laser media Reviewed

Yasutake Ohishi, Tatsuya Yamashita, Takenobu Suzuki

OPTICAL COMPONENTS AND MATERIALS VI 7212 2009 （ ISSN:0277-786X ）

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The spectroscopic properties of Tb(3+)-doped borosilicate glasses are investigated to assess their potential as gain media in the 0.54 mu m band. Analysis of the concentration and temperature dependences of the optical transitions from the (5)D(4) level of Tb(3+) is carried out. The emission lifetime of the (5)D(4) level at 300 K is found to be 2.61 +/- 0.03 ms, and almost invariant for Tb(3+) concentrations less than 15 wt% (1.68x10(21) ions/cm(3)). Judd-Ofelt analysis is used to calculate the emission transition probabilities from the (5)D(4) level and the emission cross section at 300 K for the (5)D(4) -> (7)F(5) transition was 8.1 x 10(-22) cm(2) at 541 nm. Temperature dependent non-radiative relaxation of the (5)D(4) level is observed in samples with 5 and 20 wt% Tb(3+). The quenching process of the (5)D(4) level in the temperature range of 50 similar to 373 K is thought to be caused by a two-photon one-site resonant process, whereas it is dominated by a two-site non-resonant process at temperatures below 40 K. Our results indicate that Tb(3+)-doped borosilicate glass is a promising candidate for optical gain media in the green (0.54 mu m) band

DOI： 10.1117/12.808701
Supercontinuum Generation from UV to 3.85 mu m in a Fluoride Fiber

Guanshi Qin, Xin Yan, Chihiro Kito, Meisong Liao, Chitrarekha Chaudhari, Takenobu Suzuki, Yasutake Ohishi

2009 35TH EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC) 34 ( 13 ) 2015 2009 （ ISSN:0146-9592 ）

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We report what we believe to be the first demonstration of supercontinuum generation from UV to 3.85 m in a 2.5 cm long fluoride fiber pumped by a 1450 nm femtosecond laser.

DOI： 10.1364/OL.34.002015
ビスマス含有アルミノホウ酸塩ガラスにおける赤外発光挙動 Reviewed

正井博和*, 高橋儀宏*, 藤原巧東北大院工*, 鈴木　健伸, 大石　泰丈

第56回応用物理学関係連合講演会 2a-P17-13 2008

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太陽光励起によるNd添加ガラスの発光量子効率測定 Reviewed

鈴木　健伸, 那須弘之*, 大石　泰丈, 水野真太郎*, 長谷川和男*, 伊藤博豊田中央研究所*

第56回応用物理学関係連合講演会 1a-TF-2 2008

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Highly efficient Brillouin slow light generation using a single mode tellurite fiber Reviewed

Guanshi Qin, Hideyuki Sotobayashi, Masahito Tsuchiya, Atsushi Mori, Takenobu Suzuki, Yasutake Ohishi

2008 CONFERENCE ON LASERS AND ELECTRO-OPTICS & QUANTUM ELECTRONICS AND LASER SCIENCE CONFERENCE, VOLS 1-9 1298 - + 2008

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We demonstrate highly-efficient Brillouin slow-light-generation in a low loss tellurite fiber. A time-delay of 74ns is achieved for an input pulse of 40ns width in a 200m long fiber with a pump power of 19.7mW. (c) 2008 Optical Society of America.
Group velocity dispersion in chalcogenide As2S3 glass nanofibers Reviewed

C. Chaudhari*, Takenobu Suzuki, Yasutake Ohishi

Technical digest of CLEO/QELS2008,JTuA81 2008

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Improved bismuth doped aluminogermanate glass for broadband optical amplification Reviewed

マーク　ヒューズ, Takenobu Suzuki, Yasutake Ohishi

Proceedings of 3rd EPS-QEOD Europhoton Conference 2008

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Floating zone growth of Ni-doped MgCa2O4 single crystal for near-infrared turnable laser Reviewed

Takenobu Suzuki, Y. Arai*, Yasutake Ohishi

Proceedings of SPIE 7056 2008

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Power dependence of Brillouin linewidths in a silica fiber Reviewed

Guanshi Qin, Takenobu Suzuki, Yasutake Ohishi

2008 CONFERENCE ON LASERS AND ELECTRO-OPTICS & QUANTUM ELECTRONICS AND LASER SCIENCE CONFERENCE, VOLS 1-9 2183 - 2184 2008

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We report the dependence of Brillouin linewidths on the pump power below the threshold of Brillouin lasing in a silica fiber, and explain these experimental results by the distributed fluctuating source model. (C) 2008 Optical Society of America.
Stable gain-switched 845nm pulse generation by a weak 1550nm seed laser Reviewed

G. Qin*, Takenobu Suzuki, Yasutake Ohishi

Technical digest of CLEO/QELS2008,JTuA73 2008

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Flat supercontinuum generation in a microstructure tellurite fiber, Reviewed

G. Qin*, M. Liao*, C. Chaudahari*, Y. Arai*, Takenobu Suzuki, Yasutake Ohishi

IEEE/LEOS Annual Meeting 2008,TuE2 (accepted) 2008

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Design of Zero Chromatic Dispersion Chalcogenide As2S3 Glass Nanofibers Reviewed

C Chaudhari*, Takenobu Suzuki, Yasutake Ohishi

IEEE J. Lightwave Technol 2008

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Chalcogenide Core Photonic Crystal Fibers for Zero Chromatic Dispersion in the C-Band Reviewed

C. Chaudhari*, Takenobu Suzuki, Yasutake Ohishi

OFCNFOEC2009, OTuC4 2008

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Tellurite fiber Raman laser with a turnable range over 170nm Reviewed

G. Qin*, M. Liao*, Takenobu Suzuki, A. Mori*, Yasutake Ohishi

IEEE/LEOS Annual Meeting 2008,TuE1 2008

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Eu添加Na2O-B2O3-SiO2系分相ガラスの光吸収および発光特性 Reviewed

岸哲生*, Siti Nurul Ayzan 東京理科大学*, 荒井雄介*, 鈴木　健伸, 大石　泰丈, 曽我公平*, 安盛敦雄東京理科大学*

日本セラミックス協会2008年年会 3E08 ( 2008 ) 2008

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Stable gain-switched 845 nm pulse generation by a weak 1550 nm seed laser Reviewed

Guanshi Qin*, Takenobu Suzuki, Yasutake Ohishi

Optics Letters 33 ( 3 ) 249 - 251 2008

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Organic-inorganic hybrid transparent materials containing chromium ion-doped forsterite crystals as gain media Reviewed

Yusuke Arai*, Guanshi Qin*, Takenobu Suzuki, Yasutake Ohishi, Takao Tani 豊田中央研究所*, Shu Saeki 豊田中央研究所*

Applied Physics Letters 92 ( 4 ) 041120 - 1 2008

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Nd2Cr共添加結晶化ガラスの発光特製 Reviewed

水野真太郎*, 長谷川和男*, 伊藤博豊田中央研究所*, 那須寛之*, 鈴木　健伸, 大石　泰丈

日本セラミックス協会2009年年会,2K09 2008

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NaYF4含有オキシフロライド透明結晶化ガラスの作製 Reviewed

鈴木　健伸, 重本雅也*, 水野賢人*, 大石　泰丈

日本セラミックス協会2009年年会,2P055 2008

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NaF-YF3-Al2O3-SiO2オキシフロライド透明結晶化ガラスの創製 Reviewed

鈴木　健伸, 水野賢人*, 重本雅也*, 大石　泰丈

The 19th Meeting on Glasses for Photonics 29 - 30 2008

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Pulse broadening of zero-gain Brillouin slow light in an optical fiber Reviewed

Guanshi Qin, Takenobu Suzuki, Yasutake Ohishi

2008 34TH EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC) 5 5 - 9 2008

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We investigate pulse-broadening effects of zero-gain Brillouin slow-light (ZGBSL) in an optical fiber. The results show that the stored-capacity of ZGBSL is less than that of SBS amplifier-based slow-light system.
Optical properties of Ni-doped MgGa2O4 single crystal as potential candidate for new tunable near-infrared laser Reviewed

Takenobu Suzuki, マーク　ヒューズ, Y. Arai*, Yasutake Ohishi

Proceedings of 3rd EPS-QEOD Europhoton Conference,TU 26 2008

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Gain flattened fiber Raman amplifiers by tailoring Raman amplification bandwidth of tellurite glasses Reviewed

Rajan Jose, Guanshi Qin, Yusuke Arai, Takenobu Suzuki, Yasutake Ohishi

SOLID STATE LASERS AND AMPLIFIERS III 6998 69981K - 1 2008 （ ISSN:0277-786X ）

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Raman spectral bandwidths of tellurite glasses are widened by using Raman active components of suitable concentration in appropriate base glasses. The MoO6 octahedra were found to have high octahedral distortion; therefore, have high Raman polarizability compared to WO6, NbO6, and TaO6 octahedra and PO4 tetrahedra. This high Raman polarizability enabled broadening of the spectral width up to similar to 350 cm(-1) while maintaining high Raman scattering intensities. Although similar bandwidths could be achieved using combined generation of WO6 octahedra and PO4 tetrahedra, the resultant Raman scattering intensity Of Such glasses is only half of that could be achievable using MoO6. It is shown that the simplest tellurite glass showing wide spectral broadening is a quaternary system comprising a network modifier (BaO or Bi2O3) and two Raman oscillators (NbO6 and MoO6 octahedra). Using the newly developed gain medium gain flattened S+ C+ L ultrabroadband fiber Raman amplifier are designed by solving the inverse amplifier design problem. The relative gain flatness and the effective bandwidth of new gain medium are better and larger than those of conventional tellurite fibers.

DOI： 10.1117/12.780950
Relaxation process of the 4I13/2 level of Er3+ in a borosilicate glass Reviewed

メイソン　リャオ, T. Yamashita*, L. Huang*, Y. Arai*, Takenobu Suzuki, Yasutake Ohishi

Journal of Non-Crystalline Solids 355 ( 2 ) 96 - 100 2008

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Zero and Flattened Chromatic Dispersion Chalcogenide Glass Nanofibers Reviewed

C. Chaudhari*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of 3rd EPS-QEOD Europhoton Conference 8 2008

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Chromatic Dispersions in Highly Nonlinear Glass Nanofibers Reviewed

Chitrarekha Chaudhari, Takenobu Suzuki, Yasutake Ohishi

PHOTONIC FIBER AND CRYSTAL DEVICES: ADVANCES IN MATERIALS AND INNOVATIONS IN DEVICE APPLICATIONS II 7056 7056 - 61 2008 （ ISSN:0277-786X ）

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We design air cladding tellurite (TeO(2)), bismuth oxide (Bi(2)O(3)) based, and chalcogenide (AS(2)S(3)) nanofibers, and calculate the chromatic dispersions. For each material, wavelength dependent propagation constants of the nanofiber are obtained from the exact solutions of the Maxwell's equations, and from the propagation constants the chromatic dispersion is calculated. We tailor the dispersion to zero at the communication wavelength, 1.5 mu m, by proper selection of the core diameter of the nanofiber for all the above materials. We further explain the technique for flattening the zero dispersion in telecommunication window, using glass instead of air, as the cladding of the nanofiber structure. Using the glass cladding has the advantage of easy handling, specially, for the communication purposes. Further, the glass cladding causes larger effective index difference between various modes of the nanofiber, thus reducing the mode coupling. We present the numerical results of the dispersion flattening technique by assuming the borosilicate glass cladding to the chalcogenide As(2)S(3) glass core nanofiber. With the borosilicate cladding the dispersion characteristics of the nanofiber change drastically and flattening of the zero dispersion is achieved at 1.408 mu m wavelength, when the core diameter is 724 nm.

DOI： 10.1117/12.795811
Spectroscopic properties of Tb3+ -doped borosilicate glasses for new green laser media Reviewed

Yasutake Ohishi, T. Yamashita*, Takenobu Suzuki

Proc. of SPIE 7212 721219 - 1 2008

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Development of bismuth doped lead-aluminum-zinc-germanate glass as a broadband optical gain medium Reviewed

マーク　ヒューズ, Takenobu Suzuki, Yasutake Ohishi

Proc. of SPIE 7212 721203 - 1 2008

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Numerical modeling of zero-gain Brillouin slow light in a tellurite fiber Reviewed

Guanshi Qin*, Takenobu Suzuki, Yasutake Ohishi

Japanese Journal of Applied Physics.Part 1 47 ( 6 ) 4589 - 4591 2008

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On the near- infrared luminescence from TeO2 containing borate glasses Reviewed

S. Khonthon*, P. Punpai*, S. Morimoto*, Y. Arai*, Takenobu Suzuki, Yasutake Ohishi

Journal of Ceramic Society of Japan 116 829 - 831 2008

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Advanced bismuth-doped lead-germanate glass for broadband optical gain devices Reviewed

マーク　ヒューズ, Takenobu Suzuki, Yasutake Ohishi

Journal of Optical Society of America B 25 ( 8 ) 1380 - 386 2008

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Stable gain-switched 845nm pulse generation by a weak 1550nm seed laser Reviewed

Guanshi Qin*, Takenobu Suzuki, Yasutake Ohishi

Optics Letters 33 ( 3 ) 549 - 251 2008

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Widely tunable ring-cavity tellurite fiber Raman laser Reviewed

Guanshi Qin*, メイソン　リャオ, Takenobu Suzuki, A. Mori*, Yasutake Ohishi

Optics Letters 33 ( 17 ) 2014 - 2016 2008

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広帯域光増幅用結晶化ガラス Reviewed

大石　泰丈, 鈴木　健伸

セラミックス 43 ( 12 ) 1031 - 1035 2008

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Stimulated Brillouin scattering in a single-mode tellurite fiber for amplification, lasing, and slow light generation Reviewed

Guanshi Qin*, H. Sotobayashi*, M. Tsuchiya*, A. Mori*, Takenobu Suzuki, Yasutake Ohishi

Journal of Lightwave Technology 26 ( 5 ) 492 - 498 2008

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Effect of carbon addition and TeO2 concentration on NIR luminescent characteristics of TeO2-doped soda-lime-silicate glasses Reviewed

P. Punpai*, S. Morimoto*, S. Khonthon*, Y. Arai*, Takenobu Suzuki, Yasutake Ohishi

Journal of Non-Crystalline Solids 354 5529 - 5532 2008

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Organic-Inorganic Hybrid Transparent Materials Containing Ni:MgO Nano-crystals for Gain Media Reviewed

Y. Arai*, Takenobu Suzuki, Yasutake Ohishi, T. Tani*, S.Saeki*

Applied Physics Express 1 112501 - 1 2008

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Group velocity dispersion in a few mode chalcogenide nanofiber Reviewed

C. Chaudhari*, Takenobu Suzuki, Yasutake Ohishi

Technical digest of CLEO/QELS2008 92 - 95 2008

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Group Velocity Dispersion in Chalcogenide As(2)S(3) Glass Nanofibers Reviewed

Chitrarekha Chaudhari, Takenobu Suzuki, Yasutake Ohishi

2008 CONFERENCE ON LASERS AND ELECTRO-OPTICS & QUANTUM ELECTRONICS AND LASER SCIENCE CONFERENCE, VOLS 1-9 2583 - 2584 2008

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Group velocity dispersions of air and borosilicate cladding chalcogenide As(2)S(3) nanofibers are calculated and compared. Zero flattened dispersion can be tailored around telecommunication wavelength, 1.5 mu m, by proper cladding material and the nanofiber core diameter. (C) 2008 Optical Society of America
Simultaneous 853 nm plus 1533 nm amplification, and wavelength conversion between 1533 nm and 853 nm in Er3+-doped fluoride fiber - art. no. 689012 Reviewed

Guanshi Qin, Takenobu Suzuki, Yasutake Ohishi

OPTICAL COMPONENTS AND MATERIALS V 6890 89012 - 89012 2008 （ ISSN:0277-786X ）

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In this paper, we investigate simultaneous 853 nm + 1533 rim amplification, and wavelength conversion between 1533 nm and 853 nm in Er3+-doped fluoride fiber. Based on our simulation results, simultaneous 853 nm (4S(3/2)-> 4I(13/2) transition) + 1533 nm (4I(13/2)-> 4I(15/2) transition) amplification, and wavelength conversion between 1533 nm and 853 nm can be realized in Er3+-doped fluoride fibers with the excitation of a 974 nm laser diode, respectively. Furthermore, we investigate the interactions between 853 nm and 1533 nm amplifications, and discuss their effects on simultaneously 853 rim + 1533 nm amplifier. The crosstalk between 853 nm and 1533 nm signals is very weak because of relatively long lifetime (similar to 10 ms) of the 4I(13/2) level. By introducing a cavity for 853 nm or 1533 nm lasing into the system, the possibility of wavelength conversion from 1533 nm to 853 nm or from 853 nm to 1533 nm in Er3+-doped fluoride fiber excited at 974 rim is clarified, which can be used as the wavelength converter or optical switch between public (the third window: similar to 1533 nm) and local (the first window: similar to 853 nm) networks in future networks.

DOI： 10.1117/12.761989
22 dB all-fiber green amplifier using Er3+-doped fluoride fiber - art. no. 68900Y Reviewed

Guanshi Qin, Tatsuya Yamashita, Yusuke Arai, Takenobu Suzuki, Yasutake Ohishi

OPTICAL COMPONENTS AND MATERIALS V 6890 Y8900 - Y8900 2008 （ ISSN:0277-786X ）

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We demonstrate a 22 dB all-fiber amplifier at 546 nm using Er3+-doped fluoride fiber by forward upconversion pumping of a 974 nm laser diode. The gain saturation effects and the power conversion efficiency of this amplifier are investigated in detail based on gain characteristics and numerical simulations.

DOI： 10.1117/12.759341
Flat supercontinuum generation in a microstructure tellurite fiber Reviewed

Guanshi Qin, Meisong Liao, Chitrarekha Chaudhari, Yusuke Arai, Takenobu Suzuki, Yasutake Ohishi

Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS 177 - 178 2008 （ ISBN:9781424419326 ISSN:1092-8081 ）

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We report what we believe to be the first demonstration of flat supercontinuum generation expanding from 1000 to 2100 nm from a microstructure tellurite fiber pumped by a tunable ultrafast laser source. ©2008 IEEE.

DOI： 10.1109/LEOS.2008.4688546
Tellurite fiber Raman laser with a tunable range over 170 nm Reviewed

Guanshi Qin, Meisong Liao, Takenobu Suzuki, Atsushi Mori, Yasutake Ohishi

Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS 175 - 176 2008 （ ISBN:9781424419326 ISSN:1092-8081 ）

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We demonstrate a widely tunable ring-cavity tellurite fiber Raman laser covering the S+C+L+U band. A high optical signal-to-noise ratio of over 60 dB for almost all the tunable range is also obtained. ©2008 IEEE.

DOI： 10.1109/LEOS.2008.4688545
Crystallization kinetics and spectroscopic investigations on Tb3+ and Yb3+ codoped glass ceramics containing CaF2 nanocrystals Reviewed

Lihui Huang, Guanshi Qin, Yusuke Arai, Rajan Jose, Takenobu Suzuki, Yasutake Ohishi, Tatsuya Yamashita, Yusuke Akimoto

JOURNAL OF APPLIED PHYSICS 102 ( 9 ) 2007.11 （ ISSN:0021-8979 ）

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Transparent Tb3+ and Yb3+ codoped oxyfluoride glass ceramics containing CaF2 nanocrystals were prepared by melt quenching and subsequent heat treatment. Crystallization kinetics of CaF2 nanocrystals was investigated by differential scanning calorimetric method. The average apparent activation energy E-a of the crystallization was similar to 498 kJ/mol. Moreover, the value of the Avrami exponent n was 1.01. These results suggest that the crystallization mechanism of CaF2 is a diffusion controlled growth process of needles and plates of finite long dimensions. X-ray diffraction patterns and transmission electron microscopy image confirmed the CaF2 nanocrystals in the glass ceramic. Ultraviolet (UV) and visible emission spectra of the as-made glass and the glass ceramic with an excitation of a 974 nm laser diode were recorded at room temperature. An intense UV emission at 381 nm was observed in the glass ceramic. The origin of the enhancement of the emission at 381 nm was investigated using spectroscopic technique and Judd-Ofelt analysis. The enhancement of the emission at 381 nm could be attributed to the change of the ligand field of Tb3+ ions due to the incorporation of some Tb3+ and Yb3+ ions into CaF2 nanocrystals in the glass ceramic. (C) 2007 American Institute of Physics.

DOI： 10.1063/1.2802289
Stimulated Brillouin Scattering in a Single Mode Tellurite Fiber for Amplification, Lasing and Slow Light Generation Reviewed

Guanshi Qin*, Hideyuki Sotobayashi 情報通信研究機構*, Masahiro Tsuchiya 情報通信研究機構*, Atsushi Mori NTTフォトニクス研究所*, Takenobu Suzuki, Yasutake Ohishi

Journal of Lightwave Technology 26 ( 5 ) 492 - 498 2007

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A Novel Bismuth-doped Soda-Lime-Silicate Glass as Ultra-Broadband Near-Infrared Gain Media Reviewed

Yusuke Arai*, Takenobu Suzuki, Yasutake Ohishi and Shigeaki Morimoto スラナリ工科大学(タイ)*

Proceedings of CLEO/Europe - IQEC (Conference on Lasers and Electro-Optics / International Quantum Electronics Conference) 2007, CE9-2-THU 2007

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A new UV laser media: Tb3+ and Yb3+ codoped oxyfluoride glass-ceramic containing CaF2 nanocrystals Reviewed

Lihui Huang, Tatsuya Yamashita, Rajan Jose, Yusuke Arai, Takenobu Suzuki, Yasutake Ohishi

Conference on Lasers and Electro-Optics Europe - Technical Digest 2007 （ ISBN:1424409306 ）

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DOI： 10.1109/CLEOE-IQEC.2007.4386189
Tellurium Ion-Doped Transparent Glass-Ceramics as A Novel Active Medium for Broadband Near-Infrared Amplifiers and Tunable Lasers Reviewed

Yusuke Arai*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of XXIst International Congress on Glasses, M6 2007

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Spectroscopic Properties of Bismuth Ion-Doped Lithium-Alumino-Silicate Glasses for Ultra-Broadband Near-Infrared Gain Media Reviewed

Yusuke Arai*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of XXIst International Congress on Glasses, M21 2007

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New Organic-Inorganic Hybrid Materials Containing Transition Metal Ion-Doped Nano-Crystals as Transparent Gain Media Reviewed

Yusuke Arai*, Takenobu Suzuki, Yasutake Ohishi, Takao Tani and Shu Saeki*

Proceedings of XXIst International Congress on Glasses, J36 2007

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A New Green Fiber Laser using Terbium-doped Fluoride fiber Reviewed

Tatsuya Yamashita 豊田中央研究所&D3*, Guanshi Qin*, Takenobu Suzuki, Yasutake Ohishi

OFC/NFOEC 2008 - 2008 Conference on Optical Fiber Communication/National Fiber Optic Engineers Conference 2007

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Crystallization processes of Li2O―Ga2O3-SiO2-NiO system glasses Reviewed

Takenobu Suzuki, Yusuke Arai*, Yasutake Ohishi

Journal of Non-Crystalline Solids 353 36 - 43 2007

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Intense ultraviolet emission from Tb3+ and Yb3+ codoped glass ceramic containing CaF2 nanocrystals Reviewed

Lihui Huang*, Tatsuya Yamashita D2*, Rajan Jose*, Yusuke Arai*, Takenobu Suzuki, Yasutake Ohishi

Applied Physics Letters 90 131116 - 1 2007

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Frequency upconversion analysis for Tb3+-Yb3+ co-doped system in glass materials Reviewed

Tatsuya Yamashita 豊田中央研究所&D3*, Yusuke Arai*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE Active and Passive Optical Components for Communications VII 67750V - 1 2007

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Stimulated Raman and Brillouin scattering in tellurite glasses for slow light generation Reviewed

Guanshi Qin*, Rajan Jose*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE Active and Passive Optical Components for Communications VII 67750Y - 1 2007

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Visible emission of Tb3+-Yb3+ co-doped fluorophosphate glasses Reviewed

Yusuke Arai*, Tatsuya Yamashita 豊田中央研究所&D3*, Shin Horiguchi*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE Optical Components and Materials V 689003 - 1 2007

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Tellurite glass micro-superspheres as broadband Raman resonator Reviewed

Yusuke Arai*, Guanshi Qin*, Takenobu Suzuki, Yasutake Ohishi, Tetsuji Yano 東京工業大学*, Shuichi Shibata 東京工業大学*

Proceedings of SPIE Optical Components and Materials V 689009 - 1 2007

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Simultaneous 853 nm + 1533 nm amplification, and wavelength conversion between 1533 nm and 853 nm in Er3+-doped fluoride fiber Reviewed

Guanshi Qin*, Takenobu Suzuki, Yasutake Ohishi

Proceedings of SPIE Optical Components and Materials V 689012 - 1 2007

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Ultrabroadband near-infrared emission from a colorless bismuth-doped glass Reviewed

Yusuke Arai*, Takenobu Suzuki, Yasutake Ohishi, Shigeaki Morimoto スラナリ工科大学(タイ)*, Shigeaki Morimoto スラナリ工科大学(タイ)*

Applied Physics Letters 90 ( 26 ) 261110-1 - 61110-3 2007

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22 dB all-fiber green amplifier using Er3+-doped fluoride fiber Reviewed

Guanshi Qin*, Tatsuya Yamashita 豊田中央研究所&D3*, Yusuke Arai*, Takenobu Suzuki, Yasutake Ohishi

Optics Communications 279 298 - 02 2007

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Power dependence of Brillouin linewidths in a silica fiber Reviewed

Guanshi Qin*, Takenobu Suzuki, Yasutake Ohishi

Optics Letters 32 ( 21 ) 3155 - 3157 2007

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Intense Ultraviolet Upconversion Emissions from Tb3+- and Yb3+-codoped Phosphate Glasses Reviewed

Lihui Huang*, Tatsuya Yamashita 豊田中央研究所&D3*, Guanshi Qin*, Takenobu Suzuki, Yasutake Ohishi

Japanese Journal of Applied Physics.Part 2 46 ( 47 ) L1161 - L1163 2007

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Quantum efficiencies of near-infrared emission for Ni2+-doped glass-ceramics Reviewed

Takenobu Suzuki, Yusuke Arai*, Yasutake Ohishi

Journal of Luminescence 128 603 - 09 2007

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Frequency upconversion analysis for Tb3+-Yb3+ co-doped system in glass materials - art. no. 67750V Reviewed

Tatsuya Yamashita, Yusuke Arai, Takenobu Suzuki, Yasutake Ohishi

ACTIVE AND PASSIVE OPTICAL COMPONENTS FOR COMMUNICATIONS VII 6775 V7750 - V7750 2007 （ ISSN:0277-786X ）

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Spectroscopic analyses have been performed on Tb3+ and Yb3+ co-doped in borosilicate glass, to assess their potential as green laser and amplifier gain media. The energy transfer efficiencies between Tb3+ and Yb3+ are clarified based on experimental observations and numerical analyses on the emission decay dynamics.

DOI： 10.1117/12.732847
Stimulated Raman and Brillouin scattering in tellurite glasses for slow light generation - art. no. 67750Y Reviewed

Guanshi Qin, Rajan Jose, Takenobu Suzuki, Yasutake Ohishi

ACTIVE AND PASSIVE OPTICAL COMPONENTS FOR COMMUNICATIONS VII 6775 Y7750 - Y7750 2007 （ ISSN:0277-786X ）

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In this study, we investigated the performance of slow light generation via SBS or SRS in tellurite glass based on characterization of Raman and Brillouin gain coefficients and an evaluation method of slow light generation we developed. The effects of different heavy metal oxides additions on slow light generation via SRS in tellurite glass are also discussed. Our results show that designed tellurite glass is a promising candidate for slow light generation via SBS or SRS due to its high Raman and Brillouin gain coefficients.

DOI： 10.1117/12.732800
Thermal and optical properties of TeO2-BaO-SrO-Nb2O5 based glasses: New broadband Raman gain media Reviewed

Rajan Jose, Takenobu Suzuki, Yasutake Ohishi

JOURNAL OF NON-CRYSTALLINE SOLIDS 352 ( 52-54 ) 5564 - 5571 2006.12 （ ISSN:0022-3093 ）

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We systematically added WO3 (UP to 10 mol%) and P2O5 (up to 16 mol%) in Teo(2) BaO-SrO-Nb2O5 (TBSN) glass system and studied thermal and optical properties of the resultant glasses. The dependences of the additive concentration on glass transition (T-g) and crystallization (T-x) temperatures are presented. The TBSN glass added with >= 4 mol% WO3 and PA showed high stability against crystallization. The changes in optical band gap energy due to WO3 and P2O5 addition was studied using UV-VIS-NIR absorption spectrometry. The WO3 addition shifted the optical band gap to longer wavelengths, whereas P2O5 addition shifted that to shorter wavelengths. Effects of the WO3 and P2O5 addition on the Raman spectra of' TBSN glass are clarified. New Raman bands due to WO4 and PO4 tetrahedra formed in the resultant glasses broadened their Raman spectra. Present glasses are characterized by higher thermal stability and wider Raman spectra, therefore, they are promising candidates for fiber Raman amplifiers in photonics systems. (c) 2006 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.jnoncrysol.2006.09.013
New P2O5 and WO3 doped tellurite glasse's as broadband Raman gain media Reviewed

Rajan Jose, Takenobu Suzuki, Yasutake Ohishi

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS 45 ( 29-32 ) L786 - L789 2006.8 （ ISSN:0021-4922 ）

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New tellurite-based glasses as broadband Raman gain media are developed to realize high performance fiber Raman amplifiers. These performances are achieved by WO3 and P2O5 doping in TeO2-BaO-SrO-Nb2O5 (TBSN) glass. The maximum gain coefficient obtained in the present study was similar to 50 times that of silica glass for 532 nm excitation. The bandwidth (i.e., full width at half maximum) of these doped glasses was more than twice that of a conventional tellurite-based glass and 70% larger than that of silica glass.

DOI： 10.1143/JJAP.45.L786
Structural and fluorescence properties of Ni : MgO-SIO2 particles synthesized by flame spray pyrolysis Reviewed

T Suzuki, Y Ohishi, T Tani

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY 128 ( 1-3 ) 151 - 155 2006.3 （ ISSN:0921-5107 ）

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Structural and fluorescence properties of flame spray-synthesized Ni I mol%-doped MgO-SiO2 nano-particles (MgO:SiO2 = 100:0, 50:50, 25:75 and 0: 100 in mol%) were investigated as a first step to prepare transparent materials containing Ni:MgO for optical gain media. Polyhedral aggregates of primary particles with diameters of 8-19 nm were obtained for all compositions. The 100MgO particles were single crystalline and showed the fluorescences (centered at 1260 and 1320 nm) and lifetime (3.8 ms) similar to those of solid state-synthesized Ni:MgO polycrystalline powder under laser excitation at 976 nm, suggesting Ni ions incorporated in MOO. (c) 2005 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.mseb.2005.11.035
Ultrabroadband near―infrared emission from Bi―doped Li2O-Al2O3-SiO2　ｇlass Reviewed

Takenobu Suzuki, Yasutake Ohishi

Applied Physics Letters 88 ( 19 ) 191912 - 1_191912 2006

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Raman characteristics and nonlinear optical properties of tellurite and phosphotellurite glasses containing heavy metal oxides with ultrabroad Raman bands Reviewed

G. Senthil Murugan*, Takenobu Suzuki, Yasutake Ohishi

Journal of Applied Physics 100 023107 - 1 2006

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New P2O5 and WO3 Doped Tellurite Glasses as Broadband Raman Gain Media Reviewed

Rajan Jose*, Takenobu Suzuki, Yasutake Ohishi

Japanese Journal of Applied Physics.Part 2 45 ( 30 ) L786 - L789 2006

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Thermal and optical properities of TeO2-BaO-SrO-Nb2O5 based glasses: New broadband Raman gain media Reviewed

Rajan Jose*, Takenobu Suzuki, Yasutake Ohishi

Journal of Non-Crystalline Solids 352 5564 - 5571 2006

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Chromium―Doped Forsterite Nanoparticle Synthesis by Flame Spray Pyrolysis Reviewed

Takao Tani 豊田中央研究所*, Shu Saeki 豊田中央研究所*, Takenobu Suzuki, Yasutake Ohishi

Journal of the American Ceramic Society 90 ( 3 ) 805 - 808 2006

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Chromium-Doped Forsterite Nanoparticle Synthesis by Flame Spray Pyrolysis Reviewed

Takao Tani 豊田中央研究所*, Shu Saeki 豊田中央研究所*, Takenobu Suzuki, Yasutake Ohishi

Journal of the American Ceramic Society 90 ( 3 ) 805 - 808 2006

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Possibility of New Green Optical Gain Media Reviewed

Yasutake Ohishi, Tatsuya Yamashita 豊田中央研究所&D3*, Takenobu Suzuki

Proceedings of International Commission on Glass TC20 Annual Meeting 2007 2006

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Ultra-broadband emission over 1000 nm from Bi-doped lithium alumino silicate glass as a new near-infrared gain medium Reviewed

Yasutake Ohishi, Takenobu Suzuki

2006 European Conference on Optical Communications Proceedings, ECOC 2006 We3.P14 155 - 156 2006 （ ISBN:9782912328397 ）

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Near-nfrared emission over 1000 nm, which should be useful for ultra-broadband optical amplifiers and tunable lasers, has been observed from a Bi-doped silicate glass.

DOI： 10.1109/ECOC.2006.4801210
Bi-doped lithium alumino silicate glass for ultra-broadband near-infrared optical gain medium Reviewed

Takenobu Suzuki, Yasutake Ohishi

Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference, CLEO/QELS 2006 CMEF2 2006 （ ISBN:1557528136 ）

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Near infrared emission with a bandwidth more than 450 nm which should be useful for ultra broadband optical amplifiers and tunable lasers for optical telecommunication, has been observed from Bi-doped lithium alumino silicate glass. © 2006 Optical Society of America.

DOI： 10.1109/CLEO.2006.4627731
Broadband near-infrared emission properties for Bi-doped silicate glasses as new laser and optical amplification media Reviewed

Yasutake Ohishi, Takenobu Suzuki

ACTIVE AND PASSIVE OPTICAL COMPONENTS FOR COMMUNICATIONS VI 6389 638915 - 1 2006 （ ISSN:0277-786X eISSN:1996-756X ）

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A broad near-infrared emission of Bi-doped lithium alumino silicate glasses has been investigated. It was found that the peak wavelength and width of the emission from the glasses could be controlled drastically by the excitation wavelength. The emission spectrum had the broadest full width of half maximum (FWHM) of more than 500 nm under the 900 nm excitation. The emission consisted of two Gaussian peaks and the stimulated emission cross sections at the peaks were calculated as 7.3x10(-21) and 2.3x10(-20) cm(2). The lifetime was almost independent of temperature up to 350 K, indicating that the emission from the Bi-doped lithium alumino silicate glass has strong resistance to the thermal quenching. It was found that the peak wavelength and the width of the emission from the glasses depend on both the excitation wavelength and the Bi content for the first time. The emission covered a spectral range from 920 to wavelengths over 2000 run. The bandwidth exceeded 1000 nm. The quantum efficiency of the emission was obtained as 11 % when the glass was excited at 974 nm.

DOI： 10.1117/12.686814
New phospho-tellurite glasses for ultra-broadband fiber Raman amplifiers Reviewed

G. Senthil Murugan, Takenobu Suzuki, Yasutake Ohishi

Ceramic Transactions 197 135 - 140 2006 （ ISBN:0470083433 ISSN:1042-1122 ）

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Phospho-tellurite glasses containing heavy metal oxides and alkaline earth oxides have been fabricated. The presence of BaO and SrO in the glasses remarkably increased their thermal stabilities. These glasses have thermal stabilities as high as 224 °C, which make them suitable for various fiber devices applications. The corrected relative Raman intensities (I COrr) and scattering cross sections (σCOrr) of various peaks for all the glasses are compared with respect to silica. These glasses show superior relative Raman cross sections than silica and conventional tellurite glasses, the most widely studied for fiber devices applications (TeO2-ZnO-Li2O-Bi2O3, TZLB). The gain bandwidth is also an important parameter apart from the Raman gain coefficient in selecting a material for Raman amplifiers. The bandwidth broadening effect can be estimated based on σCOrr/I corr as σCOrr is proportional to the Raman scattering intensity and broadness of the spectrum. For simplicity the broadness of the bandwidth of the present glasses are also judged by the normalized bandwidth with respect to silica (i.e. bandwidth of sample/bandwidth of silica). It is 1.55 for one of the representative phospho-tellurite glasses and 0.75 for TZLB. The presence of heavy metal oxides and alkaline earth oxides makes the Raman bands due to TeO2 and P2O5 continuous and one such glass has continuous Raman bandwidths exceeding 700 cm ·1. Thus, these glasses could be potential candidates for ultra-broadband fiber Raman amplifiers.
Structural and optical properties of nickel zinc alumino-gallo-silicate glass Reviewed

T. Suzuki, G. Senthil Murugan, Y. Ohishi

Physics and Chemistry of Glasses 46 ( 4 ) 400 - 403 2005.8 （ ISSN:0031-9090 ）

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Transparent glass-ceramic was obtained from ZnO-Ga2O 3-Al2O3-SiO2 glasses. The colour drastically changed from brownish yellow to green on heat treatment between the glass transition and crystallisation temperatures. The crystalline phase precipitated in the treatment was identified as spinel type crystal, by x-ray diffraction measurements. Transmission electron microscope observations confirmed that the crystallite size was about 10-15 nm in diameter. Broadband near-infrared emission was observed from the transparent glass-ceramics with the excitation by 976 nm. It was thought that the spinel nano-crystallites containing Ni should act as the emission centre.
Raman spectroscopic studies of quaternary tellurite glasses containing Nb2O5 and Ta2O5 Reviewed

G. Senthil Murugan*, Takenobu Suzuki, Yasutake Ohishi

Physics and Chemistry of Glasses 46 ( 4 ) 359 - 364 2005.8

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Raman spectroscopic studies of quaternary tellurite glasses containing Nb<inf>2</inf>O<inf>5</inf> and Ta<inf>2</inf>O<inf>5</inf> Reviewed

G. Senthil Murugan, T. Suzuki, Y. Ohishi

Physics and Chemistry of Glasses 46 ( 4 ) 359 - 364 2005.8 （ ISSN:0031-9090 ）

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New quaternary glasses in the systems TeO2-BaO-SrO-Nb 2O5 and TeO2-BaO-SrO-Ta2O 5 are prepared, and are found to have improved thermal stabilities and refractive indices, making them suitable for photonics device applications. Systematic Raman spectroscopic studies of these glasses are undertaken to unravel the presence of various structural units, and the contributions made by them with varying modifier oxides contents have been quantified. A comparative study is made on the evolution of various structural units with the addition of modifier oxides in the two glass systems. The Raman bandwidths of these glasses are broader compared to conventional tellurite glasses. Both glass systems show an additional Raman band beyond 870 cm-1 that is not present in other tellurite glass systems. The Nb-O related vibrational band near 870 cm -1 is stronger than the band around 900 cm-1 in the Ta2O5 containing glasses. The coordination geometry of tellurium atoms in the presence of Nb2O5 and Ta 2O5 is discussed with the help of molecular modelling results.
Optical properties of transparent Li2O-Ga2O3-SiO2 glass-ceramics embedding Ni-doped nanocrystals Reviewed

T Suzuki, GS Murugan, Y Ohishi

APPLIED PHYSICS LETTERS 86 ( 13 ) 131903 - 1 2005.3 （ ISSN:0003-6951 ）

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Authorship：Lead author Language：English Publishing type：Research paper (scientific journal) Publisher：AMER INST PHYSICS

Transparent Li2O-Ga2O3-SiO2 (LGS) glass-ceramics embedding Ni:LiGa5O8 nanocrystals were fabricated. An intense emission centered around 1300 nm with the width of more than 300 nm was observed by 976 nm photoexcitation of the glass-ceramics. The lifetime was more than 900 mu s at 5 K and 500 mu s at 300 K. The emission could be attributed to the T-3(2g)(F-3) _--> (3)A(2g) (F-3) transition of W, in distorted octahedral sites in LiGa5O8. The product of stimulated emission cross section and lifetime for the emission was about 3.7 x 10(-24) cm(2) s and was a sufficiently practical value. (C) 2005 American Institute of Physics.

DOI： 10.1063/1.1891272
Spectroscopic properties of a novel near-infrared tunable laser material Ni:MgGa2O4 Reviewed

Takenobu Suzuki, G. Senthil Murugan*, Yasutake Ohishi

Journal of Luminescence 113 265 - 270 2005

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Optical Properties of transparent Li2O-Ga2O3-SiO2 glass-ceramics embedding Ni-doped nanocrystals Reviewed

Takenobu Suzuki, G. Senthil Murugan*, Yasutake Ohishi

Applied Physics Letters 85 ( 13 ) 131903 2005

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Tellurite glasses for ultrabroadband fiber Raman amplifiers Reviewed

G. Senthil Murugan*, Takenobu Suzuki, Yasutake Ohishi

Applied Physics Letters 86 ( 16 ) 161109 - 1 2005

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Publishing type：Research paper (scientific journal)
Phospho-tellurite glasses containing heavy metal oxides for ultrabroad band fiber Raman amplifiers Reviewed

G. Senthil Murugan*, Takenobu Suzuki, Yasutake Ohishi

Applied Physics Letters 86 ( 22 ) 221109 - 1 2005

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Publishing type：Research paper (scientific journal)
Optical properties of erbium and thulium co-doped in tellurite glasses for the S+C band optical amplification Reviewed

Yasutake Ohishi, Tutomu Fumita, Hiroki Yamauchi, Takenobu Suzuki

Proceedings of SPIE - The International Society for Optical Engineering 6014 601417 - 1 2005 （ ISSN:0277-786X ）

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Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings)

Optical spectroscopic properties of Er 3+ and Tm 3+ ions in new niobium tellurite glasses, TeO 2BaO-SrO-Nb 2O 5 (TBSN), were investigated for (S+C)-band optical amplifications. On the basis of consideration for cross-relaxation among Tm 3+ ions and multi-phonon relaxation, it was shown that the presence of Nb 2O 5, which was source of the highest energy phonon, contributed to relaxation processes in TBSN glasses. The C-band amplification transition for Er 3+ and the S-band amplification transition for Tm 3+ are both sufficiently efficient in TBSN glasses and the Er 3+-Tm 3+ co-doped TBSN fibers could be efficient seamless (S+C)-band amplification media by selecting the concentrations of Er 3+ and Tm 3+.

DOI： 10.1117/12.630420
Nonlinear optic behavior of transparent surface crystallized glasses in the BaO-B2O3-TeO2 system Reviewed

GS Murugan, T Suzuki, Y Ohishi, Y Takahashi, Y Benino, T Fujiwara, T Komatsu

2005 PACIFIC RIM CONFERENCE ON LASERS AND ELECTRO-OPTICS 897 - 898 2005

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Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

Second order nonlinear optic behavior of a transparent glass-ceramic containing borate crystallites in tellurite glass is reported. Controlled heat-treatment resulted in surface crystallization of BaB4O7 in the BaO-B2O3-TeO2 glass system.
Ultra-broad band phospho-tellurite glasses containing heavy metal oxides for fiber Raman amplifiers Reviewed

T. Suzuki, G. Senthil Murugan, Y. Ohishi

Pacific Rim Conference on Lasers and Electro-Optics, CLEO - Technical Digest 2005 1569 - 1570 2005 （ ISBN:0780392426 ）

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Phospho-tellurite glasses containing heavy metal oxides and alkaline-earth oxides have been fabricated. Presence of these oxides makes the Raman bands due to TeO2 and P2O5 continuous and suitable for ultra-broad band fiber Raman amplifiers.

DOI： 10.1109/CLEOPR.2005.1569816
Efficient broadband near-infrared emission from Ni2+-doped Li2O-Ga2O3- SiO2 transparent glass ceramics Reviewed

Takenobu Suzuki, G. Senthil Murugan*, Yasutake Ohishi

Technical Digest of CLEO/QELS 2005 (Conference on Lasers and Electro-Optics Quantum Electronics and Laser Science Conference Photonics Applications, Systems and Technologies Conference 2005), CME7 2005

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Structual and optical properties of ZnO-Al2O3-SiO2 system glass-ceramics containing Ni2+-doped nanocrystals Reviewed

Takenobu Suzuki, Kayo Horiguchi Toyota Central R&D Laboratories*, Yasutake Ohishi

Journal of Non-Crystalline Solids 351 2304 - 2309 2005

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Authorship：Lead author Publishing type：Research paper (scientific journal)
A new category of tellurite glasses for ultra-broadband fibre Raman amplifiers Reviewed

Yasutake Ohishi, G. Senthil Murugan*, Takenobu Suzuki

Proceedings oe ECOC 2005 (31st European Conference on Optical Communications) 3 649 - 650 2005

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Ultra-broadband near-infrared emission from Bi-doped lithium alumino silicate glasses for optical amplification Reviewed

Yasutake Ohishi, Takenobu Suzuki

Technical Digest of OFC/NFOEC2006 (the 2006 Optical Fiber Communication Conference and the National Fiber Optic Engineers Conference) OW133 2005

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Quantum efficiency of a near-infrared emission from Ni2+-doped Li2O-Ga2O3-SiO2 transparent glass-ceramics Reviewed

Yasutake Ohishi, Takenobu Suzuki, G. Senthil Murugan*

Conference Digest of CLEO/Europe-EQEC 2005 CE3 - 4TUE 2005

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A new category of tellurite glasses for ultra-broadband fiber Raman amplifiers Reviewed

Yasutake Ohishi, G. Senthil Murugan, Takenobu Suzuki

IET Conference Publications 2005 ( 502 ) 649 - 650 2005

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Language：English Publishing type：Research paper (international conference proceedings) Publisher：Institution of Engineering and Technology

Performance of a new phospho-tellurite glass system as Raman amplification media is reported. It is clarified this system realizes continuous Raman spectra from 550 to 1300 cm-1 and is promising as ultra-broadband Raman amplification media.

DOI： 10.1049/cp:20050653
Quantum efficiency of a broadband near-infrared emission from Ni 2+-doped Li2O-Ga2O3-SiO2 transparent glass-ceramics Reviewed

Yasutake Ohishi, Takenobu Suzuki, G. Senthil Murugan

Conference on Lasers and Electro-Optics Europe - Technical Digest 282 2005 （ ISBN:0780389743 ）

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Language：English Publishing type：Research paper (international conference proceedings)

DOI： 10.1109/CLEOE.2005.1568067
Second-harmonic generation in transparent surface crystallized glasses in the BaO-B2O3-TeO2 system Reviewed

G. Senthil Murugan, Takenobu Suzuki, Yasutake Ohishi, Yoshihiro Takahashi, Yasuhiko Benino, Takumi Fujiwara, Takayuki Komatsu

Applied Physics Letters 85 ( 16 ) 3405 - 3407 2004.10 （ ISSN:0003-6951 ）

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Language：English Publishing type：Research paper (scientific journal)

A transparent glass-ceramic containing borate crystallites in tellurite glass is reported. Controlled heat treatment resulted in surface crystallization of BaB4O7 in the BaO-B2O3-TeO 2 glass system. The second-order optical nonlinearities observed in these surface crystallized glasses were attributed to the distortion present in the BaB4O7 unit cell as evidenced by x-ray powder diffraction studies. A d33 value of 0.08 pm/V was obtained from the Maker fringe analysis for a surface crystallized glass. © 2004 American Institute of Physics.

DOI： 10.1063/1.1808873
Second Harmonic Generation in Transparent Surface Crystallized Glasses in te BaO-B2O3-TeO2 system Reviewed

G. Senthil Murugan*, Takenobu Suzuki, Yasutake Ohishi, Yoshihiro Takahashi*, Yasuhiko Benino*, Takumi Fujiwara*, Takayuki Komatsu*

Applied Physics Letters 85 ( 16 ) 3405 - 3407 2004

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Publishing type：Research paper (scientific journal)
Broadband Near-infrared Emission from Nickel in Zinc-Alumino-Silicate Glass Reviewed

Takenobu Suzuki, Yasutake Ohishi

Proceedings of XX International Congress on Glass,O-14-004 2004

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Authorship：Lead author Publishing type：Research paper (international conference proceedings)
Quaternary tellurite glasses containing Nb2O5 and Ta2O5 for fiber Raman amplifiers Reviewed

Ganapathy Senthil Murugan, Takenobu Suzuki, Yasutake Ohishi

Frontiers in Optics 2004/Laser Science XXII/Diffractive Optics and Micro-Optics/Optical Fabrication and Testing 2004

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Publishing type：Research paper (international conference proceedings) Publisher：OSA

DOI： 10.1364/fio.2004.fmb4
Ni: MgGa2O4 as a novel near-infrared tunable laser material Reviewed

Takenobu Suzuki, Ganapathy Senthil Murugan, Yasutake Ohishi

Frontiers in Optics 2004/Laser Science XXII/Diffractive Optics and Micro-Optics/Optical Fabrication and Testing 2004

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Authorship：Lead author Publishing type：Research paper (international conference proceedings) Publisher：OSA

DOI： 10.1364/fio.2004.ftus5
Room temperature broadband near-infrared emission from nickel in zinc-alumino-silicate glass Reviewed

Takenobu Suzuki, Yaintake Ohishi

OSA Trends in Optics and Photonics Series 96 A 525 - 526 2004 （ ISSN:1094-5695 ）

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Authorship：Lead author Publishing type：Research paper (international conference proceedings)

Broadband near-infrared emission from nickel in zinc-alumino-silicate glass was observed at room temperature. The center and width of the emission band were ∼1400 nm and >300 nm respectively. The emission lifetime was >200 μsec even at room temperature. © 2003 Optical Society of America.
A nickel-doped silicate glass as a new category for broadband optical amplification media Reviewed

Yasutake Ohishi, Takenobu Suzuki

Proceedings of 30th European Conference on Optical Communication 3 514 - 515 2004

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Authorship：Last author Publishing type：Research paper (international conference proceedings)
Broadband 1400 nm emission from Ni₂+ in zinc-alumino-silicate glass Reviewed

Takenobu Suzuki, Yasutake Ohishi

Applied Physics Letters 84 ( 19 ) 3804 2004

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Authorship：Lead author Publishing type：Research paper (scientific journal)
New materials for broadband optical amplifiers Reviewed

Y Ohishi, T Suzuki

ACTIVE AND PASSIVE OPTICAL COMPONENTS FOR WDM COMMUNICATIONS IV 5595 26 - 35 2004 （ ISSN:0277-786X ）

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Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings) Publisher：SPIE-INT SOC OPTICAL ENGINEERING

An emission, which covers the spectral range from the O to L-band, was observed from a Ni2+-doped zinc-alumino-silicate glass at room temperature. The emission lifetime was about 440 musec at 5 K and decreased with an increase temperature to 240 musec at 300 K. The emission band was identified as the downward d-d T-3(2g)(F-3)-->(3)A(2g)(F-3) transition of octahedral Ni2+ ions. It was confirmed from X-ray diffraction analyses and transmission electron microscope observations that ZnAl2O4 spinel nano-crystals containing octahedral Ni2+ ions acted as emission centers. It is expected that the Ni2+-doped glass has a potential for a broadband amplification medium.

DOI： 10.1117/12.572636
Vacuum ultraviolet optical absorption band of non-bridging oxygen hole centers in SiO2 glass Reviewed

Hideo Hosono, Koichi Kajihara, Takenobu Suzuki, Yoshiaki Ikuta, Linards Skuja, Masahiro Hirano

Solid State Communications 122 ( 3-4 ) 117 - 120 2002.4 （ ISSN:0038-1098 ）

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Publishing type：Research paper (scientific journal) Publisher：Elsevier BV

DOI： 10.1016/s0038-1098(02)00118-7

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MISC

Numerical investigation on a new designed hollow-core photonic crystal fiber with large modal separation

Weiqing Gao, Xiu Zhang, Zhengxiong Zhang, Wenhui Jiang, Yong Zhou, Wei Zhang, Liang Chen, Peng Wang, Panyun Gao, Meisong Liao, Takenobu Suzuki, Yasutake Ohishi

Optical and Quantum Electronics 51 ( 11 ) 2019.11 （ ISSN:0306-8919 eISSN:1572-817X ）

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Publishing type：Book review, literature introduction, etc.

We investigate the characteristics of optical modes in a new designed hollow-core photonic crystal fiber (PCF) with large modal separation. The large effective refractive index difference between the adjacent second-order vector modes can be maintained higher than 0.001 within the wavelength range from 1 to 2 μm. The maximum value can arrive 0.01199 between HE21 and TM01 mode at 2 μm. The fundamental mode of the proposed PCF has flat dispersion in a wide spectral range, which can be applied on wideband supercontinuum generation. The influence on the characteristics by the PCF structure has also been investigated. The increase of the size of the central air hole and the duty cycle affects the flatness of the dispersion curve to some extent. Our simulated results could provide an optimized fiber structure for the experimental study on stable transmission of vector modes.

DOI： 10.1007/s11082-019-2062-y
太陽光励起ファイバレーザ用ガラスレーザ媒質 (特集太陽光励起レーザ : クリーンなエネルギーを求めて)

鈴木健伸

光アライアンス 24 ( 8 ) 10 - 14 2013.8 （ ISSN:0917-026X ）

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Language：Japanese Publisher：日本工業出版
Development of Solar-Pumped Fiber Lasers at the Visible and Telecom Bands

( 33 ) 91 - 95 2012 （ ISSN:1883-3128 ）

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Language：Japanese
Nd,Cr共添加ケイ酸塩ガラス中のCrからNdへのエネルギー移動効率

水野真太郎, 長谷川和男, 伊藤博, 河井優幸, 那須寛之, 鈴木健伸, 大石泰丈

応用物理学関係連合講演会講演予稿集(CD-ROM) 57th 2010
太陽光励起Nd³⁺添加テルライトガラスの量子効率

那須寛之, 河井優幸, 鈴木健伸, 大石泰丈, 水野真太郎, 長谷川和男, 伊藤博, 鹿野弘二

応用物理学関係連合講演会講演予稿集(CD-ROM) 57th 2010
太陽光励起レーザー媒体の開発-テルライトガラスにおける量子効率の励起波長依存性-

水野真太郎, 那須寛之, MARK Hughes, 伊藤博, 長谷川和男, 鈴木健伸, 大石泰丈

応用物理学会学術講演会講演予稿集 70th ( 2 ) 2009
太陽光励起レーザー媒体の開発-Nd添加テルライトガラスの量子効率評価-

水野真太郎, 那須寛之, HUGHES Mark, 伊藤博, 長谷川和男, 鈴木健伸, 大石泰丈

応用物理学会学術講演会講演予稿集 70th ( 3 ) 2009

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Books

Photonics Glasses and Glass-Ceramics

Takenobu Suzuki, Ganapathy Senthil Murugan*, Yasutake Ohishi（6.Transparent silicate glass-ceramics embedding Ni-doped nanocrystals）

Research Signpost 2010

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Responsible for pages：195-222 Book type：Scholarly book

Presentations

Pseudo-disordered tellurite-based oxide fiber International conference

DE CLERMONT, Jonathan, 鈴木　健伸, 中谷　明日佳, 大石　泰丈

第83回応用物理学会秋季学術講演会 ( Tohoku University (Sendai) ) 2022.9 Japan Society of Applied Physics

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Presentation type：Oral presentation (general)
低融点ガラス特殊ファイバの作製と赤外応用 International conference

鈴木　健伸, 大石　泰丈

2019年電子情報通信学会 ( 大阪大学 ) 2019.9 電子情報通信学会

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赤外イメージ伝送用ランダム断面構造光ファイバ International conference

鈴木　健伸, 畔柳駿介*, Tong Hoang Tuan, 大石　泰丈

The 29th Meeting on Glasses for Photonics ( 京都大学　吉田南キャンパス ) 2019.1 日本セラミックス協会　ガラス部会フォトニクス分科会

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フォトニックバンドギャップの動的制御による超高速光変調 International conference

大石　泰丈, 田中駿太*, Tong Hoang Tuan, Tonglei Ceng*, 鈴木　健伸

The 29th Meeting on Glasses for Photonics ( 京都大学　吉田南キャンパス ) 2019.1 日本セラミックス協会　ガラス部会フォトニクス分科会

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Presentation type：Oral presentation (general)
テルライト中空コア光ファイバの伝搬特性 International conference

西原口寅彦*, Tong Hoang Tuan, 鈴木　健伸, 大石　泰丈

第79回応用物理学会秋季学術講演会 ( 愛知県名古屋国際会議場 ) 2018.9

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Presentation type：Oral presentation (general)
Propagation of a supercontinuum light cource in a novel tellurite hollow core optical fiber. International conference

Takenobu Suzuki

OSA2018FiO/LS ( Washington DC, USA ) 2018.9

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Presentation type：Oral presentation (general)
低フォノンエネルギーCaO-Al₂O₃-Ga₂O₃ International conference

野田海斗*, 鈴木　健伸, 大石　泰丈

第65回応用物理学会春季学術講演会 ( 早稲田大学, 東京都新宿区 ) 2018.3

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太陽光励起ファイバレーザ用Cr³⁺, Nd³⁺ 共添加 Li₂O-Ga₂O₃-Al₂O₃-SiO₂ 系結晶化ガラスの発行特性 International conference

梅村侑史*, 熊澤正樹*, 鈴木　健伸, 大石　泰丈

日本セラミックス協会2018年年会 ( 東北大学、宮城県仙台市 ) 2018.3

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All-solid tellurite optical fiber with transversely disordered refractive index profile and its optical image transport performance. International conference

Tong Hoang Tuan, Shunei Kuroyanagi*, Takenobu Suzuki, Yasutake Ohishi

SPIE Photonics West 2018 ( The Moscone Center, San Francisco, USA ) 2018.1 SPIE

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Presentation type：Oral presentation (general)
Experimental investigation cascaded stimulated Raman in chalcogenide optical fiber. International conference

トンレイ　チャン, Shuguang Li **, Xin Yan **, Tong Hoang Tuan, Morio Matsumoto **, Shigeki Cho **, Takenobu Suzuki, Yasutake Ohishi

SPIE Photonics West 2018 ( The Moscone Center, San Francisco, USA ) 2018.1 SPIE

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Presentation type：Oral presentation (general)
Far-detuned four-wave mixing for mid-infrared wavelength conversion in chalcogenide As2S5 suspended core fiber. International conference

Kenshiro Nagasaka*, Tong Hoang Tuan, Nguyen Phuoc Trung Hoa*, Takenobu Suzuki, Yasutake Ohishi

SPIE Photonics West 2018 ( The Moscone Center, San Francisco, USA ) 2018.1 SPIE

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Presentation type：Oral presentation (general)
Mid-infrared frequency conversion via normal dispersion modulation instability in chalcogenide fibers. International conference

ライ　リュウ, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

SPIE Photonics West 2018 ( The Moscone Center, San Francisco, USA ) 2018.1 SPIE

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Tailoring Nd³⁺ emission spectrum by using a Neodymium-doped tellurite all-solid photonic bandgap fiber. International conference

Tong Hoang Tuan, Daisuke Demichi*, Takenobu Suzuki, Yasutake Ohishi

SPIE Photonics West 2018 ( The Moscone Center, San Francisco, USA ) 2018.1

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カルコゲナイドファイバを用いた中赤外スーパーコンティニューム光発生 International conference

長坂憲志朗*, Tong Hoang Tuan, トンレイ　チャン, 鈴木　健伸, 大石　泰丈

レーザー学会第511回研究会「ファイバレーザー技術」 ( 名古屋大学, 愛知県名古屋市 ) 2017.11

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Tailoring 1.33-µm spontaneous emission of Neodymium-ion by a novel tellurite all-solid photonic bandgap fiber International conference

Tong Hoang Tuan, Daisuke Demichi*, Takenobu Suzuki, Yasutake Ohishi

7th International Workshop on Photoluminescence in Rare Earths: Photonic Materials and Devices (PRE’17) ( Faculty of Civil and Industrial Engineering, Sapienza University of Rome, Rome, Italy ) 2017.11

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Intense blue upconversion emission in Tm3+, Yb3+ co-doped NaYSiO4 phosphors. International conference

Xiaojie Xue*, Takenobu Suzuki, Yasutake Ohishi

7th International Workshop on Photoluminescence in Rare Earths: Photonic Materials and Devices (PRE’17) ( Faculty of Civil and Industrial Engineering, Sapienza University of Rome, Rome, Italy ) 2017.11

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低フォノンエネルギーアルカリ土類アルミノガレートガラスの作製 International conference

野田海斗*, 鈴木　健伸, 大石　泰丈

第58回ガラスおよびフォトニクス材料討論会 ( 名古屋国際会議場, 愛知県名古屋市 ) 2017.11

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ランダム断面構造光ファイバの作製と赤外イメージ伝送 International conference

畔柳俊英*, Tong Hoang Tuan, 長坂憲志朗*, 鈴木　健伸, 大石　泰丈

第58回ガラスおよびフォトニクス材料討論会 ( 名古屋国際会議場, 愛知県名古屋市 ) 2017.11

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Energy transfer Cr³⁺→Er³⁺ in transparent oxyfluoride glass-ceramics. International conference

Takenobu Suzuki, Satoshi Takemoto*, Yasutake Ohishi

7th International Workshop on Photoluminescence in Rare Earths: Photonic Materials and Devices (PRE’17) ( Faculty of Civil and Industrial Engineering, Sapienza University of Rome, Rome, Italy ) 2017.11

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Presentation type：Oral presentation (general)
Stimulated Raman Scattering in Hybrid Chalcogenide Microstructured Optical Fibers. International conference

Weiqing Gao **, Chenquan Ni **, Xiangcai Chen **, Li Chen **, Zhengqiang Wen **, トンレイ　チャン, Takenobu Suzuki, Yasutake Ohishi

OSA Laser Congress 2017 ( Nagoya Congress Center, Nagoya, Japan ) 2017.10

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Presentation type：Oral presentation (general)
Infrared image transport through an all-solid tellurite optical glass rod with transversely-disordered refractive index profile. International conference

Tong Hoang Tuan, Shunei Kuroyanagi*, Takenobu Suzuki, Yasutake Ohishi

OSA Laser Congress 2017 ( Nagoya Congress Center, Nagoya, Japan ) 2017.10

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Effects of Fluctuations of Pulse Duration and Peak Power on the Coherence Properties of Supercontinuum Spectra. International conference

ライ　リュウ, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

OSA Frontiers in Optics 2017 ( Washington DC, USA ) 2017.9

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Presentation type：Oral presentation (general)
Suppressing 1.06-mm spontaneous emission of Neodymium by using a tellurite all-solid photonic bandgap fiber. International conference

Tong Hoang Tuan, Daisuke Demichi*, Takenobu Suzuki, Yasutake Ohishi

OSA Frontiers in Optics 2017 ( Washington DC, USA ) 2017.9 OSA

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Presentation type：Oral presentation (general)
Fabrication and Characterization of an All-solid Double-clad Tellurite Photonic Bandgap Fiber. International conference

トンレイ　チャン, Shunta Tanaka*, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

OSA Frontiers in Optics 2017 ( Washington DC, USA ) 2017.9

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Optical Temperature Sensing in NaYSiO4:Er3+/Yb3+ Upconvesion Phosphors. International conference

Xiaojie Xue*, トンレイ　チャン, Takenobu Suzuki, Yasutake Ohishi

OSA Frontiers in Optics 2017 ( Washington DC, USA ) 2017.9

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Suppressing the Effect of Dispersion Fluctuation on Broadband Optical Parametric Amplification using Highly Nonlinear Tellurite Microstructured Optical Fibers. International conference

Tong Hoang Tuan, Harutaka Kawamura*, Takenobu Suzuki, Yasutake Ohishi

14th International Joint Conference on e-Business and Telecommunications (ICETE 2017) ( Mostoles campus of URJC, Madrid, Spain ) 2017.7

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Modeling of dispersion flattened chalcogenide double clad fibers for midinfrared light generation. International conference

Kenshiro Nagasaka*, Tong Hoang Tuan, Takenobu Suzuki, Yasutake Ohishi

CLEO/Europe-EQEC2017 ( ICM Centre of the New Munich Trade Fair Centre, Munich, Germany ) 2017.6

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Flat Supercontinuum Generation in a Silica Photonic Crystal Fiber by Triple Wavelength Pumping. International conference

Weiqing Gao **, Chenquan Ni **, Xiangcai Chen **, Li Chen **, Zhengqiang Wen **, Xiaojie Xue*, トンレイ　チャン, Takenobu Suzuki, Yasutake Ohishi, 他1名*

CLEO/Europe-EQEC2017 ( ICM Centre of the New Munich Trade Fair Centre, Munich, Germany ) 2017.6

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Dynamic bandgap control in a double cladding tellurite photonic bandgap fiber. International conference

Tong Hoang Tuan, Shunta Tanaka*, Takenobu Suzuki, Yasutake Ohishi

CLEO/Europe-EQEC2017 ( ICM Centre of the New Munich Trade Fair Centre, Munich, Germany ) 2017.6

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Mid-infrared Supercontinuum Generation in Chalcogenide Double Clad Fiber. International conference

Kenshiro Nagasaka*, Tong Hoang Tuan, Morio Matsumoto **, Hiroshige Tezuka **, Takenobu Suzuki, Yasutake Ohishi

CLEO/IQEC2017 ( San Jose Convention Center, San Jose, USA ) 2017.5

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Chromatic dispersion fluctuation and optical parametric amplification performance in a tellurite hybrid microstructured optical fiber with buffer layer. International conference

Tong Hoang Tuan, Nguyen Phuoc Trung Hoa*, Harutaka Kawamura*, Takenobu Suzuki, Yasutake Ohishi

CLEO/IQEC2017 ( San Jose Convention Center, San Jose, USA ) 2017.5

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Experimental Investigation of Inverse Raman Scattering in a Single Mode Tellurite Fiber. International conference

トンレイ　チャン, Xiaojie Xue*, Tong Hoang Tuan, Weiqing Gao*, Takenobu Suzuki, Yasutake Ohishi

CLEO/IQEC2017 ( San Jose Convention Center, San Jose, USA ) 2017.5

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Experimental observation of Stimulated Raman Scattering in a Fluoride Fiber International conference

トンレイ　チャン, Weiqing Gao*, シュエ　シャオジエ, Takenobu Suzuki, Yasutake Ohishi

SPIE Photonics West 2017 ( San Francisco, USA ) 2017.2 SPIE

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Experimental Investifation of Mid-infrared Supercontinuum Generation in Chalcogenide Step-index Optical Fibers. Invited International conference

トンレイ　チャン, Dinghuan Deng*, Kenshiro Nagasaka*, Tong Hoang Tuan, Morio Matsumoto **, Hiroshige Tezuka **, Takenobu Suzuki, Yasutake Ohishi

SPIE Photonics West 2017 ( San Francisco, USA ) 2017.1 SPIE

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Highly nonlinear chalcogenide hybrid microstructured optical fibers with buffer layer and their potential performance of supercontinuum generation. International conference

Tong Hoang Tuan, Kenshiro Nagasaka*, Nguyễn Phước Trung Hòa*, Takenobu Suzuki, Yasutake Ohishi

SPIE Photonics West 2017 ( San Francisco, USA ) 2017.1 SPIE

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Luminescent properties and phase transition in Er³⁺-Yb³⁺- co-doped NaYF₄/SiO2 core-shell nanoparticles. International conference

シュエ　シャオジエ, トンレイ　チャン, Weiqing Gao*, Takenobu Suzuki, Yasutake Ohishi

SPIE Photonics West 2017 ( San Francisco, USA ) 2017.1 SPIE

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Mid-infrared roque wave generation in chalcogenide fibers. International conference

ライ　リュウ, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

SPIE Photonics West 2017 ( San Francisco, USA ) 2017.1 SPIE

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Fabrication of an all-solid tellurite disordered optical rod for transverse localization of light. International conference

Tong Hoang Tuan, レイ　チャン, Shunei Kuroyanagi*, Shunta Tanaka*, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

Advanced Solid State Laser Congress 2016 (ASSL) ( Boston, USA ) 2016.10 OSA The Optical Society

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Luminescent Properties of Nd³⁺/Cr³⁺-doped LiCaAlF Flower-like Microcrystals. International conference

シュエ　シャオジエ, トンレイ　チャン, Takenobu Suzuki, Yasutake Ohishi

OSA Frontiers in Optics and Laser Science 2016 ( Rochester, USA. ) 2016.10 OSA The Optical Society

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Fabrication and characterization of a tellurite all-solid photonic bandgap fiber with three rings of high index rods. International conference

Tong Hoang Tuan, Kenichi Hashimoto*, Shunta Tanaka*, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

OSA Frontiers in Optics and Laser Science 2016 ( Rochester, USA ) 2016.10 OSA The Optical Society

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Mid-infrared Dispersive Waves Generation in an All-solid AsSe2-As2S5 Microstructured Optical Fiber. International conference

トンレイ　チャン, Tong Hoang Tuan, ライ　リュウ, シュエ　シャオジエ, Morio Matsumoto **, Hiroshige Tezuka **, Takenobu Suzuki, Yasutake Ohishi

OSA Frontiers in Optics and Laser Science 2016 ( Rochester, USA ) 2016.10 OSA The Optical Society

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Wavelength Conversion Performance in a Tellurite Step-Index Optical Fiber International conference

Tong Hoang Tuan, レイ　チャン, Takenobu Suzuki, Yasutake Ohishi

Advanced Solid State Laser Congress 2016 (ASSL) ( Boston, USA ) 2016.10 OSA The Optical Society

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ファイバブラッググレーティングを用いたNd³⁺添加ZBLANガラスファイバの太陽光励起レーザー発振 International conference

鈴木　健伸, 津本尚紀*, 大石　泰丈, Bernier Martin Laval University*, Valley Real Laval University*

第77回応用物理学会秋季学術講演会 ( 朱鷺メッセ, 新潟県新潟市 ) 2016.9 公益社団法人応用物理学会

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Experimental Observation of Mid-infrared Supercontinuum Generation in an As2Se3-AsSe2 Fiber. International conference

トンレイ　チャン, Kenshiro Nagasaka*, Tong Hoang Tuan, シュエ　シャオジエ, Morio Matsumoto **, Hiroshige Tezuka **, Takenobu Suzuki, Yasutake Ohishi

42nd European Conference and Exhibition on Optical Communications (ECOC2016) ( Dusseldorf, Germany ) 2016.9

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Amplified spontaneous emission waveguide containing KY₃F₁₀:Er³⁺/Yb³⁺ nanocrystals. International conference

シュエ　シャオジエ, Takenobu Suzuki, Yasutake Ohishi

Advanced Architectures in Photonis 2016 ( Mykonos Island, Greece ) 2016.9

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Chalcogenide hybrid microstructured optical fibers with dispersive characteristic invariant to fiber structure fluctuation. International conference

Tong Hoang Tuan, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

Advanced Architectures in Photonis 2016 ( Mykonos Island, Greece ) 2016.9

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Amplified spontaneous emission waveguide containing KY3F10:Er³⁺/Yb³⁺ nanocrystals. International conference

シュエ　シャオジエ, Takenobu Suzuki, Yasutake Ohishi

Advanced Architectures in Photonis 2016 ( Mykonos Island, Greece ) 2016.9

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Optical Parmetric Amplification Performance in AsSe2-based Hybrid Microstructured Optical Fibers. International conference

Tong Hoang Tuan, Kenshiro Nagasaka*, Morio Matsumoto **, Hiroshige Tezuka **, Takenobu Suzuki, Yasutake Ohishi

The 7th International Conference on Optical Communication Systems – OPTICS 2016 ( Lisbon, Portugal ) 2016.7 INSTICC

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Femtosecond Four-Wave Mixing from Near-Infrared to Mid-Infrared in a Tellurite Step-Index Fiber. International conference

レイ　チャン, Tong Hoang Tuan, Harutaka Kawamura*, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

CLEO2016 ( San Jose, USA ) 2016.6 OSA The Optical Society

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Solar pumped lasing of Nd-doped ZBLAN double-clad fiber with silica fiber Bragg gratings. International conference

Takenobu Suzuki, Naoki Tsumoto*, Yasutake Ohishi

CLEO (Conference on Lasers and Electro-Optics) 2016 ( San Jose Convention Center, San Jose, USA ) 2016.6 OSA The Optical Society

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Quantum Yield Measurements of KY₃F₁₀ : Er³⁺/Yb³⁺ Nanocrystals Excited by a 976 nm Laser. International conference

シュエ　シャオジエ, トンレイ　チャン, Takenobu Suzuki, Yasutake Ohishi

CLEO2016 ( San Jose, USA. ) 2016.6 OSA The Optical Society

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The suppression of chromatic dispersion fluctuation in chalcogenide hybrid microstructured optical fibers and their parametric amplification performance. International conference

Tong Hoang Tuan, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

CLEO2016 ( San Jose, USA ) 2016.6 OSA The Optical Society

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Experimental Observation of Multiple Four-wave Mixing Induced by Optical Solitons in a Tellurite Microstructured Optical Fiber. International conference

トンレイ　チャン, ライ　リュウ, シュエ　シャオジエ, Kenshiro Nagasaka*, Takenobu Suzuki, Yasutake Ohishi

CLEO2016 ( San Jose, USA ) 2016.6 OSA The Optical Society

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Mid-infrared Supercontinuum Generation using Soft Glass Fibers. Invited International conference

Yasutake Ohishi, トンレイ　チャン, Dinghuan Deng*, レイ　チャン, ライ　リュウ, Takenobu Suzuki

The 10th Asia-Pacific Laser Symposium (APLS2016) ( KAL Hotel, Jeju Island, Korea ) 2016.5 Optical Society of Korea

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遷移金属添加透明結晶化ガラスの作製とその発光特性 International conference

熊澤正樹光機能物質*, 鈴木　健伸, 大石　泰丈

The 26th Meeting on Glasses for Photonics ( 日本セラミックス協会 ) 2016.1 日本セラミックス協会ガラス部会フォトニクス分科会

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高効率Er³⁺添加フッ化物ナノ結晶の作製 International conference

馬渡崇志光機能物質*, 鈴木　健伸, シュエ　シャオジエ, 大石　泰丈

平成27年度日本セラミックス協会東海支部学術研究発表会 ( 名古屋大学 ) 2015.12 日本セラミックス協会東海支部

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遷移金属添加γ-Ga₂O₃透明結晶化ガラスの作製とその発光特性 International conference

熊澤正樹光機能物質*, 鈴木　健伸, 大石　泰丈

平成27年度日本セラミックス協会東海支部学術研究発表会 ( 名古屋大学 ) 2015.12 日本セラミックス協会東海支部

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近赤外広帯域波長可変レーザーの実現に向けたCr⁴⁺:CaYGaO₄の作製 International conference

中村聖奈光機能物質*, 鈴木　健伸, 大石　泰丈

日本セラミックス協会第28回秋季シンポジウム ( 富山大学 ) 2015.9 日本セラミックス協会

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高効率太陽光励起レーザーの実現に向けた Nd³⁺, Cr³⁺ 共添加 LaGaO₃ 単結晶の作製 International conference

中村聖奈光機能物質研究室*, 鈴木　健伸, 大石　泰丈

日本セラミックス協会2015年年会 ( 岡山大学 ) 2015.3 日本セラミックス協会

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カルコゲナイドガラスハイブリッド微細構造光ファイバによるスーパーコンティニューム光の発生 International conference

加納靖大光機能物質研究室*, 浅野晃司光機能物質研究室*, 鈴木　健伸, トンレイ　チャン, 三角孝古河電子*, 松本守男古河電子*, 大石　泰丈

75回応用物理学会秋季学術講演会 ( 北海道大学 ) 2014.9 応用物理学会

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太陽光励起 Er3+添加ファイバレーザの実現性 International conference

鈴木　健伸, 岩田靖之光機能物質研究室*, 大石　泰丈

2013年春季第61回応用物理学会学術講演会 ( 青山学院大学 ) 2014.3 応用物理学会

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ガラスの非線形光学計測と高非線形光ファイバによる光波制御 Invited International conference

鈴木　健伸

第45回ガラス部会夏季若手セミナー ( 晴海グランドホテル ) 2013.8 日本セラミックス協会ガラス部会

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太陽光励起ガラスレーザ媒質の高効率化 International conference

鈴木　健伸, 水野真太郎豊田中央研究所*, 伊藤博豊田中央研究所*, 長谷川和男豊田中央研究所*, 大石　泰丈

レーザー学会445回研究会 ( ホテル阪急エキスポパーク ) 2013.7 レーザー学会

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太陽光励起ガラスレーザ媒質の高効率化 Invited International conference

鈴木　健伸

レーザー学会第445回研究会 ( ホテル阪急エキスポパーク ) 2013.7 レーザー学会

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Supercontinuum generation from a multi-ring holes tellurite microstructure fiber pumped with a 2-micron high-power mode-locked fiber laser International conference

ディンハン　デン, ガオウェイチン, メイソン　リャオ, Takenobu Suzuki, Yasutake Ohishi

2013 Photonics West ( San Francisco, USA ) 2013.2

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Optical characterization of Er-doped glasses for solar-pumped laser applications International conference

鈴木　健伸, 岩田靖之光機能物質*, 野形康平光機能物質*, 水野真太郎豊田中研*, 伊藤博豊田中研*, 大石　泰丈

Photonics West 2013 ( Moscone Convention Center, San Francisco, CA, USA ) 2013.2 SPIE

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Nd添加フッ化物ファイバの太陽光励起発振 Invited International conference

鈴木　健伸, 水野真太郎豊田中研*, 伊藤博豊田中研*, 長谷川和男豊田中研*, 大石　泰丈

レーザー学会学術講演会大33回年次大会 ( 姫路商工会議所 ) 2013.1 レーザー学会

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高効率太陽光励起レーザーの開発 Invited International conference

長谷川和男豊田中研*, 水野真太郎豊田中研*, 伊藤博豊田中研*, 市川正*, 鈴木　健伸, 大石　泰丈

レーザー学会学術講演会第33回年次大会 ( 兵庫県姫路市、姫路商工会議所 ) 2013.1 レーザー学会

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Nd添加太陽光励起ファイバレーザ用ガラス媒質の開発 International conference

鈴木　健伸

第53回ガラスおよびフォトニクス材料討論会 ( 北海道札幌市 ) 2012.10 日本セラミックス協会ガラス部会

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Nd添加太陽光励起ファイバレーザの数値シミュレーション International conference

鈴木　健伸

第73回応用物理学会学術講演会 ( 愛媛県松山市 ) 2012.9 応用物理学会

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自然太陽光を励起源としたファイバレーザーの発振 Invited International conference

水野真太郎豊田中研*, 伊藤博豊田中研*, 長谷川和男豊田中研*, 鈴木　健伸, 大石　泰丈

第73回応用物理学会学術講演会 ( 松山大学、愛媛県松山市 ) 2012.9 応用物理学会

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Nd添加ガラスの太陽光励起レーザ媒質としての光学特性評価 International conference

鈴木　健伸

第73回応用物理学会学術講演会 ( 愛媛県松山市 ) 2012.9 応用物理学会

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Energy transfer analysis of Tb3+ and Yb3+ ions doped in borosilicate glass. International conference

Takenobu Suzuki

Photonics Europe 2012 ( ブリュッセル（ベルギー） ) 2012.4 SPIE

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Spectroscopic properties of Nd3+-doped ZBLAN Glass for Solar Pumped Lasers International conference

Takenobu Suzuki

Optics for Solar Energy ( Austin, USA ) 2011.11 Optical Society of America

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Third harmonic generation measurement of non-linear optical susceptibility χ⁽³⁾ of GeGaSbS chalcogenide glasses for highly non-linear micro-structured optical fibers Invited International conference

Takenobu Suzuki

The 9th International Meeting of Pacific Rim Ceramic Societies ( Cairns Convention Centre, Cairns, Australia ) 2011.7

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Quantum efficiencies of Nd³⁺-doped glasses under sunlight: Towards solar pumped fiber lasers Invited International conference

Takenobu Suzuki

Fourth International Conference on Science and Technology of Advanced Ceramics ( Yokohama, Japan ) 2010.7

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Quantum efficiencies of Nd3+-doped glasses under sunlight: Towards solar pumped fiber lasers International conference

Takenobu Suzuki

4th International Conference on Science and Technology of Advanced Ceramics (STAC4) ( 神奈川県横浜市 ) 2010.6 東京工業大学　応用セラミックス研究所

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Awards

一般社団法人レーザー学会　業績賞（進歩賞）

2021.5 一般社団法人レーザー学会

大石　泰丈, 鈴木　健伸
Award of the Outstanding Papers Published in the JCS-Japan in 2019

2020.6 The Ceramic Society of Japan

Tong Hoang Tuan, Nobuhiko　Nishiharaguch*, Takenobu Suzuki, Yasutake Ohishi
（社）日本セラミックス協会　東海支部学術研究発表会　優秀講演賞

2011.12 （社）日本セラミックス協会　東海支部「テルライトファイバのラマンソリトン効果」というテーマで研究発表を行い、発表内容が優秀であったため。

三好祥平*, 塩坂W.輝生*, 鬼頭千尋*, シン　ヤン, 鈴木　健伸, 大石　泰丈
(社)日本セラミックス協会　東海支部学術研究発表会　優秀講演賞

2010.12 （社）日本セラミックス協会　東海支部「光ファイバの誘導ラマン散乱を用いた光信号処理の研究」というテーマで発表を行った。

三好祥平修士1年*, 塩坂W.輝生修士2年*, シン　ヤン, 鈴木　健伸, 大石　泰丈
（社)日本セラミックス協会　東海支部学術発表会　最優秀講演賞

2010.12 日本セラミックス協会　東海支部研究発表会において、「微細構造テーパーテルライト光ファイバによる広帯域スーパーコンティニュウム光の発生」を発表

鬼頭千尋修士2年*, Guanshi Qin Jilin University*, シン　ヤン, メイソン　リャオ, 鈴木　健伸, 大石　泰丈

Grant-in-Aid for Scientific Research

可視-赤外イメージ伝送用テルライトおよびカルコゲナイドマルチコアファイバの作製 Principal investigator

Grant number：23K03964 基盤研究(C) 2023 ～ 2025

鈴木健伸
Broadband coherent light generation by all solid hybrid photonic crystal fibers Coinvestigator(s)

Grant number：21H01399 Grant-in-Aid for Scientific Research (B) 2021 ～ 2023
High-resolution infrared image transport by Anderson localization optical fibers Principal investigator

Grant number：19H02203 Grant-in-Aid for Scientific Research (B) 2019 ～ 2021

Suzuki Takenobu
Mid-infrared coherent light generation by hybrid photonic crystal fiber Coinvestigator(s)

Grant number：18H01504 Grant-in-Aid for Scientific Research (B) 2018 ～ 2020

Ohishi Yasutake
Broadband lightwave geneartion using hybrid photonic crystal fibers Coinvestigator(s)

Grant number：15H02250 Grant-in-Aid for Scientific Research (A) 2015 ～ 2017

Ohishi Yasutake
Development of efficient solar pumped laser media by controlling local phonon and crystal field in solid solution crystallized glasses Principal investigator

Grant number：15K05651 Grant-in-Aid for Scientific Research (C) 2015 ～ 2017

Suzuki Takenbu

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