Updated on 2024/07/22

写真a

 
Kazuya Saito
 
Organization
Graduate School of Engineering Department of Advanced Science and Technology Materials Science and Engineering Frontier Materials Laboratory Professor   
Degree
(BLANK) （ Waseda University ）
External link
Contact information
メールアドレス

Research Areas

  • Nanotechnology/Materials / Inorganic materials and properties

  • Natural Science / Semiconductors, optical properties of condensed matter and atomic physics

  • Nanotechnology/Materials / Optical engineering and photon science

Main research papers

Research History

  • Toyota Technological Institute   Professor

    2009

  • Toyota Technological Institute

    2005 - 2009

  • 豊田理化学研究所   嘱託研究員（兼務）

    2004 - 2005

  • Toyota Technological Institute

    2001 - 2009

  • Toyota Technological Institute   Lecturer

    1999 - 2001

  • Toyota Technological Institute   Research Associate

    1995 - 1998

  • 早稲田大学理   工学部総合研究センター   客員研究員

    1993 - 1995

  • Waseda University

    1992 - 1993

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Education

  • Waseda University

    - 1989

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    Country： Japan

  • Waseda University   School of Science and Engineering

    - 1984

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    Country： Japan

  • Waseda University   Graduate School, Division of Science and Engineering

    - 1959

Professional Memberships

  • The Ceramic Society of Japan

  • 応用物理学会

Committee Memberships

  • 応用科学学会   常任評議員  

    1994   

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    Committee type：Academic society

    応用科学学会

Research theme

  • Development of visible fiberlaser

    齋藤　和也

    2015

  • Development of intersatellite fiber laser

    齋藤　和也

    2016

  • Development of ultra transparent fiber

    齋藤　和也

    2017

  • Development of high temperature fiber sensor

    齋藤　和也

    2020

  • Investigation of correlation between the structure and optical properties in silica glass

    齋藤　和也

    2017

Papers

  • Difference between X-ray-induced and 451 nm LD-induced photodarkening in DyAlGe-doped silica glasses Reviewed

    T. Okazaki*, K. Kawai*, C. Otsuka*, E. H. Sekiya, Y. Kanbayashi*, M. Mizusaki* and K. Saito

    Japanese Journal of Applied Physics   62 ( 4 )   042003 - 042003   2023.4 （   ISSN:0021-4922   eISSN:1347-4065 ）

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

    Abstract

    The difference between X-ray-induced photodarkening (X-PD) and 451 nm laser diode (LD) induced PD (LD-PD) was investigated in DyAlGe-doped silica glasses. The same defect species (Al-OHC, Dy2+, GEC, and GLPC+) are generated in X-PD and LD-PD, although the LD-PD defect population is 10−3 of the X-PD defect population. There is a big difference in the defect population ratio of GEC and Al-OHC and its dependence on Ge concentration. The ratio in LD-PD is higher than that in X-PD. The GEC population of X-PD almost saturates when Ge > 2 wt%. On the other hand, GEC of LD-PD continues to increase even if Ge exceeds 2 wt%. Based on these facts, possible mechanisms of LD-PD and the role of Ge codoping were proposed.

    DOI： 10.35848/1347-4065/acc8ab

    Other Link： https://iopscience.iop.org/article/10.35848/1347-4065/acc8ab/pdf

  • A 12,000-hour Investigation on the Brillouin Frequency Shift Behavior of a Silica Optical Fiber Exposed to High Temperatures Reviewed

    Yoshihiro KUMAGAI*, Shin-ichiro TEZUKA*, Nobuhiro TOMOSADA*, Kazuya SAITO, and Akitoshi KOREEDA*

    Technical Digest Series (Optica Publishing Group, 2023)   Th6.87   2023

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1364/OFS.2023.Th6.87

  • Effects of P co-doping on X-ray/450 nm-LD induced photodarkening in Dy 3+ doped silica glass and fiber laser Article May 2022 Reviewed

    Tomoya Okazaki, Yuma Fujigaki, Edson Haruhico Sekiya, Kota Kawai, Masato Mizusaki, Yuta Kanbayashi, Kazuya Saito

    JAPANESE JOURNAL OF APPLIED PHYSICS   61 ( 6 )   060911   2022.5 （   ISSN:0021-4922   eISSN:1347-4065 ）

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    Authorship：Last author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing Ltd  

    Effects of P-codoping on X-ray/450 nm LD induced photodarkening in Dy3+ doped silica glass and fiber were investigated to develop a visible fiber laser. P and Dy concentrations in Dy-P-doped silica glass were optimized to reduce Rayleigh scattering. It was found in optimized glass that X-ray-induced photodarkening can be well suppressed by P co-doping. 450 nm LD pumped laser oscillation was firstly observed in the fiber using optimized glass. The slope efficiency is 4.2% which is lower than those in Dy-Al-and Dy-Al-Ge-doped fibers previously reported. Contrary to the results of X-ray-induced PD, 450 nm LD-induced photodarkening easily occurred.

    DOI： 10.35848/1347-4065/ac6fa4

  • Ge-codoping effect on X-ray-induced photodarkening in Al-doped and Dy-Al-doped silica glass Reviewed

    Tomoya Okazaki, Kota Kawai, Chiaki Otsuka, Takehiro Mori, Yota Saeki, Edson Haruhico Sekiya, Kazuya Saito

    Japanese Journal of Applied Physics   61 ( 3 )   0302002 - 032002   2022.3 （   ISSN:0021-4922   eISSN:1347-4065 ）

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    Authorship：Last author   Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing  

    Abstract

    X-ray-induced photodarkening and its suppression by Ge-codoping were investigated in Al-doped, Dy-doped, and Dy-Al-doped silica glasses. Absorption bands of 4f-4f5d transition of Dy2+ were determined in Dy-Al-doped silica glass fabricated by Si nano-powders as a reducing agent, and it was found that pair generation of Dy2+ and Al-OHC was occurred in X-ray irradiated Dy-Al-doped silica glass. Ge-codoping suppresses the above-mentioned pair generation and instead forms the pair of GEC and GLPC+. A similar suppression effect of Ge-codoping was observed in Al-Ge-doped silica glass, where pair generation of Al-OHC and Al-E′ center was suppressed. To investigate the stability of defects, annihilation processes during thermal annealing were measured. Al-OHC and Dy2+ are destabilized by Ge-codoping in Al-doped and Dy-Al-doped silica glasses, while GEC is stabilized in Al-Ge-doped and Dy-Al-Ge-doped silica glasses. Based on these results, local structure models around Al, Ge, and Dy ions and possible mechanisms of photodarkening were proposed.

    DOI： 10.35848/1347-4065/ac4d02

    Other Link： https://iopscience.iop.org/article/10.35848/1347-4065/ac4d02/pdf

  • Diode pumped visible Dy 3+ -doped silica fiber laser: Ge-co-doping effects on lasing efficiency and photodarkening Reviewed

    Tomoya Okazaki, Chiaki Otsuka, Edson H. Sekiya, Kota Kawai, Masato Mizusaki, Yuta Kanbayashi, Kazuya Saito

    Applied Physics Express   15 ( 1 )   012002 - 012002   2021.12 （   ISSN:1882-0778   eISSN:1882-0786 ）

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    Authorship：Last author   Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing  

    Abstract

    We present the first demonstration of visible laser oscillation in the Dy3+-doped silica fiber pumped by a 451 nm InGaN laser diode. It was found that Ge-co-doping plays the following important roles of laser oscillation: (1) to reduce the Rayleigh scattering loss, (2) to suppress the X-ray-induced and pump-induced photodarkening (PD), and (3) to increase lasing slope efficiency. In a fiber with 0.46 wt% Dy, 1.8 wt% Ge, and 0.54 wt% Al, the slope efficiency is 22.0% at 582.5 nm, and the maximum output power is 18.4 mW.

    DOI： 10.35848/1882-0786/ac3d1d

    Other Link： https://iopscience.iop.org/article/10.35848/1882-0786/ac3d1d/pdf

  • Phase-locked and mode-locked multicore photonic crystal fiber laser with a saturable absorber Reviewed

    Tomonari Kawamura, Akira Shirakawa, Kazuya Saito

    Optics Express   29 ( 11 )   17023 - 17023   2021.5 （   ISSN:1094-4087   eISSN:1094-4087 ）

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    Authorship：Last author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Optica Publishing Group  

    Multicore photonic crystal fiber (MC-PCF) can scale the output power with the number of cores by spatial beam combining if the in-phase mode is selected. We demonstrated simultaneous realization of phase-locked and mode-locked laser using Yb-doped 7-core MC-PCF by a semiconductor saturable absorber placed in the near-field inside a resonator. High energy 333 nJ pulses were obtained directly from a mode-locked fiber laser oscillator at a 42.4 MHz repetition rate with an average power of 14.1 W at 24 W excitation. We observed the direct output pulse width of 52 ps assuming a sech2 profile. However, it might be noise-like pulses because of no variation when we performed pulse compression. Single-pulse operation was achieved by increasing the bandwidth of the intracavity filter. In this case, 137 nJ, 42.4 MHz pulses were generated with a 5.8 W average power and the compressed output pulse width was 8.6 ps.

    DOI： 10.1364/OE.421083

  • Impact of electron irradiation upon optical properties of Bismuth/Yttria codoped phosphosilicate fiber Reviewed

    A.V. Kir'yanov, A. Halder, E. Sekiya, K. Saito, Y.O. Barmenkov, V.P. Minkovich, S.I. Didenko, S.A. Legotin, K.I. Tapero

    Optics & Laser Technology   128   106245 - 106245   2020.8 （   ISSN:0030-3992 ）

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

    DOI： 10.1016/j.optlastec.2020.106245

  • Effect of P-to-Rare Earth Atomic Ratio on Energy Transfer in Er-Yb-Doped Optical Fiber Reviewed

    Yuta Kobayashi, Edson H. Sekiya, Mizuki Banno, Ryoichi Nishimura, Tomoya Okazaki, Yosuke Hashimoto, Tomohiro Araki, Kentaro Ichii, Kazuya Saito

    JOURNAL OF LIGHTWAVE TECHNOLOGY   38 ( 16 )   4504 - 4512   2020.4 （   ISSN:0733-8724   eISSN:1558-2213 ）

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    Authorship：Last author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC  

    Erbium (Er)- and Ytterbium (Yb)-doped optical fibers (EYDFs) have been used in various industrial fields as the only technology suitable for >1 W high-power amplifiers in the 1550-nm band. The output power is mainly limited by unwanted 1-mu m band amplified spontaneous emissions from excited Yb3+; however, the factors affecting the output performance remain unclear. Here, we quantitatively and systematically reveal that the Phosphorus (P)-to-rare earth atomic ratio in the EYDFs has an optimal value for achieving the best output performance of EYDFs. We experimentally evaluated the quantitative relationship among co-dopants by fabricating preforms, drawing them as fibers, and measuring the amplification characteristics. At an appropriate Er concentration (0.3-0.5 wt%), a pump-to-signal conversion efficiency of 45.4% was obtained when the P/(Yb + Er) atomic ratio was around 25. This study paves the way for energy saving in high-power applications, such as high-speed optical wireless communication and long-distance optical ranging.

    DOI： 10.1109/JLT.2020.2989774

  • 27Al MAS NMR, EXAFS and X-ray induced absorption studies in Al-doped and Yb–Al-doped silica glasses fabricated by MCVD Reviewed

    Tomoya Okazaki, Shuichi Arakawa, Edson Haruhico Sekiya, Kazuya Saito

    Japanese Journal of Applied Physics   59 ( 052002 )   1 - 10   2020.3 （   ISSN:0021-4922   eISSN:1347-4065 ）

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    Authorship：Last author   Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing  

    DOI： 10.35848/1347-4065/ab8166

    Other Link： https://iopscience.iop.org/article/10.35848/1347-4065/ab8166/pdf

  • The difference in the coordination environment around Yb3+ ions between Yb–Al-doped and Yb–P-doped silica glasses Reviewed

    Tomoya Okazaki **, Edson Haruhico Sekiya*, Kazuya Saito

    Japanese Journal of Applied Physics   59   2020

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    Authorship：Last author   Publishing type：Research paper (scientific journal)  

  • Impact of electron irradiation upon optical properties of Bismuth/Yttria codoped phosphosilicate fiber Reviewed

    A.V. Kir’anov **, Arindam Halder*, Edson Haruhico Sekiya*, Kazuya Saito, Y. O. Barmenkov **, V. P. Minkkovich **, S. I.Didenko **, S. A. Legotin **, K. I .Tapero **

    Opt. Letter Tech.   128   106245   2020

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    Publishing type：Research paper (scientific journal)  

  • Relationship between the first sharp diffraction peak and physical properties of silicon dioxide (SiO2) glasses possessing different fictive temperatures Reviewed

    Hirokazu MASAI **, Shinji KOHARA **, Yohei ONODERA **, Akitoshi KOREEDA **, Kazuya Saito, Edson Haruhico Sekiya **, Naoyuki KITAMURA **

    J. Ceramic Society Jpn   128   1 - 7   2020

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    Publishing type：Research paper (scientific journal)  

  • Effect of P-to-Rare Earth Atomic Ratio on Energy Transfer in Er-Yb-Doped Optical Fiber Reviewed

    Yuta Kobayashi **, Edson H. Sekiya*, Mizuki Banno **, Ryoichi Nishimura **, Tomoya Okazaki **, Yosuke Hashimoto **, Tomohiro Araki **, Kentaro Ichii **, Kazuya Saito

    J. Lightwave. Technology   38 ( 16 )   4505 - 4512   2020

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    Authorship：Last author   Publishing type：Research paper (scientific journal)  

  • P/Al atomic ratio dependence of local structure around Yb3+ ions and optical properties of Yb–Al–P-doped silica glass Reviewed

    Tomoya Okazaki, Edson Haruhico Sekiya, Kazuya Saito

    Japanese Journal of Applied Physics   58 ( 12 )   122005 - 122005   2019.11 （   ISSN:0021-4922   eISSN:1347-4065 ）

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    Authorship：Last author   Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing  

    DOI： 10.7567/1347-4065/ab4fa8

    Other Link： http://iopscience.iop.org/article/10.7567/1347-4065/ab4fa8/pdf

  • Broadband visible-to-NIR ASE from Bismuth doped optical fibers: a window towards lasing Reviewed

    アリンダム　ハルダー, A. V. Kir'yanov **, Kazuya Saito

    Optical Letters   58 ( 120915 )   1 - 5   2019.11

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    Authorship：Last author   Publishing type：Research paper (scientific journal)   Publisher：Japanese Journal of Applied Physics  

  • Atomic ratio P/Al dependence of local structure around Yb3+ ions and optical properties in Yb-Al-P-doped silica glasses Reviewed

    岡崎朋也 **, エジソン晴彦関谷*, Kazuya Saito

    Japanese Journal of Applied Physics   58 ( 122005 )   1 - 7   2019.10

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  • Discussion on Raleigh scattering as a dominant loss factor in VIS/NIR in bismuth-doped silicate fibers Reviewed

    Alexander V. Kir'yanov **, アリンダム　ハルダー, Yuri O. Barmenkov **, エジソン晴彦関谷*, Kazuya Saito

    Optical Materials Express   9 ( 7 )   2817 - 2827   2019.7

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  • Discussion on Raleigh scattering as a dominant loss factor in VIS/NIR in bismuth-doped silicate fibers [Invited] Reviewed

    Kir'yanov Alexander V, Halder Arindam, Barmenkov Yuri O, Sekiya Edson H, Saito Kazuya

    OPTICAL MATERIALS EXPRESS   9 ( 7 )   2817 - 2827   2019.7 （   ISSN:2159-3930 ）

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

    We present the data showing significant impact of scattering upon base-loss in the VIS/NIR region in bismuth (Bi), yttrium/lithium co-doped germano- and phospho-silicate optical fibers. The fibers were fabricated through standard modified chemical vapor deposition process in conjunction with solution-doping technique and their spectral loss (linear and nonlinear, at different excitation wavelengths) and emission properties were thoroughly studied. Among the features revealed for the fibers, the dependence of unbleached loss on wavelength obeyed (similar to 1/lambda(4)) points on Raleigh scattering behind the phenomenon. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

    DOI： 10.1364/OME.9.002817

  • P concentration dependence of local structure around Yb3+ ions and optical properties in Yb-P-doped silica glasses Reviewed

    Okazaki Tomoya, Sekiya Edson Haruhico, Saito Kazuya

    JAPANESE JOURNAL OF APPLIED PHYSICS   58 ( 6 )   062001 - 062001   2019.6 （   ISSN:0021-4922   eISSN:1347-4065 ）

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

    Local structure around Yb3+ ions in Yb-P-doped silica glasses and its P concentration dependence were elucidated by EXAFS measurements. Yb-O coordination number was found to change from 4 -> 8 -> 6 -> 7 similar to 8 with increasing the atomic ratio P/Yb. This strange change can be corresponded to the local structure changes in the order of YbPO4-like, Yb(PO3)(3)-like to YbP5O14-like local structures. This correspondence is supported by various optical measurements, such as the Rayleigh/Mie scattering, Raman scattering, absorption cross-section, CT transition, and X-ray induced defect formation, which were also found to depend on P/Yb. These results provide a guideline of the suitable P concentration in REP-doped silica glasses for various applications. (C) 2019 The Japan Society of Applied Physics

    DOI： 10.7567/1347-4065/ab17e4

    Other Link： https://iopscience.iop.org/article/10.7567/1347-4065/ab17e4

  • Fabrication and characterization of bismuth-doped germano-silicate and phospho-silicate fibers for VIS/NIR applications Reviewed

    Halder Arindam, Kir'yanov Alexander, Sekiya Edson H, Saito Kazuya

    OPTICAL MATERIALS EXPRESS   9 ( 4 )   1815 - 1825   2019.4 （   ISSN:2159-3930 ）

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

    We report a reproducible fabrication process ensuring repeatable absorption and emission properties of bismuth (Bi) doped silica-glass optical fibers (BDFs) with single-mode operation above similar to 800 nm. BDFs were fabricated through a modified chemical vapor deposition process in-line with the solution-doping technique. Lithium-germanosilicate, yttrium-germanosilicate, and yttrium-phosphosilicate glasses were used as hosts for Bi. Bi and other dopant concentrations were measured by EPMA. similar to 0.07wt% of Bi content is obtained with a transparent core. The absorptive and emissive properties of BDFs in the VIS-NIR range (targeted onto 600-900 nm) were studied thoroughly. This study is oriented to the development of VIS/NIR lasers and amplifiers, using BDFs of this type. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

    DOI： 10.1364/OME.9.001815

  • P concentration dependence of local structure around Yb3+ ions and optical properties in Yb–P-doped silica glasses Reviewed

    岡崎朋也*, エジソン晴彦関谷*, Kazuya Saito

    Japanese Journal of Applied Physics   58 ( 6 )   2019.3

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    Authorship：Last author   Publishing type：Research paper (scientific journal)   Publisher：Japanese Journal of Applied Physics  

  • Corrigendum: “Local structure of Yb3+ ions and X-ray induced defect in Yb-doped silica glass” [Jpn. J. Appl. Phys. <b>58</b> 012003 (2019)] Reviewed

    T. Okazaki, E. H. Sekiya, K. Saito

    Japanese Journal of Applied Physics   58 ( 2 )   029301 - 029301   2019.1 （   ISSN:0021-4922   eISSN:1347-4065 ）

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    Authorship：Last author   Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing  

    DOI： 10.7567/1347-4065/aafc53

    Other Link： http://stacks.iop.org/1347-4065/58/i=2/a=029301?key=crossref.35a925ab4a44ae552c381f806d4b572d

  • Local structure of Yb3+ ions and X-ray induced defect in Yb-doped silica glass Reviewed

    岡崎朋也*, エジソン晴彦関谷*, Kazuya Saito

    Japanese Journal of Applied Physics   58 ( 1 )   2019.1

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  • Fabrication of a laser cavity mirror in a large mode area fiber by an ultrashort pulse laser. Reviewed

    Kazuo Hasegawa, Satoru Kato, Tomoya Okazaki, Hiroshi Murotani, Kazuya Saito

    Applied optics   57 ( 25 )   7314 - 7317   2018.9 （   ISSN:1559-128X ）

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    Authorship：Last author   Language：English   Publishing type：Research paper (scientific journal)  

    We present herein a method to fabricate a higher-order fiber grating (HOFG) for use as a fiber-cavity mirror in a fiber laser. The HOFG was fabricated by irradiating the Yb-doped large core of a double-clad fiber by a femtosecond pulsed laser. The HOFG served as a laser cavity mirror with a reflectance of 13.2% and yielded a laser line with a spectral full width at half-maximum of 0.56 nm.

    DOI： 10.1364/AO.57.007314

  • Effects of Ge Co-Doping on P-Related Radiation-Induced Absorption in Er/Yb-Doped Optical Fibers for Space Applications Reviewed

    Yuta Kobayashi, Edson H. Sekiya, Kazuya Saito, Ryoichi Nishimura, Kentaro Ichii, Tomohiro Araki

    Journal of Lightwave Technology   36 ( 13 )   2723 - 2728   2018.7 （   ISSN:0733-8724 ）

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Institute of Electrical and Electronics Engineers Inc.  

    This study demonstrates that phosphorus-related radiation-induced absorption (RIA) bands such as P-OHC and P1 in erbium/ytterbium-doped optical fibers (EYDFs) are effectively decreased by germanium (Ge) co-doping. The suppression of the generation of both P-OHC during X-ray irradiation of glass preforms and P1 during gamma-ray irradiation of optical fibers was measured for Ge concentrations between 0 wt% and 6.7 wt%. For the 10 krad X-ray irradiation of glass preforms, it was found that the RIA decreased from 5.6 dB/cm to 1.3 dB/cm when the Ge concentration was increased from 0.79 wt% to more than 4.4 wt%. Furthermore, in multimode optical fibers (MMFs) exposed to 100 krad of gamma-ray irradiation, the RIA decreased from 3.7 dB/m to 0.90 dB/m when the Ge concentration was increased from 0.0 wt% to 4.0 wt%, whereas it was 0.35 dB/m for a single-mode optical fiber (SMF) with a Ge concentration of 6.7 wt%. These results demonstrate that Ge concentrations up to 4.4 wt% are strongly correlated with improved radiation tolerance for both glass preforms and optical fibers. This effect was more prominent for SMFs than MMFs and became saturated with excess co-doping in both cases. Therefore, Ge co-doping may represent a good solution for reducing P-related RIA in EYDFs for space applications.

    DOI： 10.1109/JLT.2018.2819193

  • Fabrication and optical analysis of bismuth doped germanosilicate preforms to develop ~830nm fiber laser Reviewed

    アリンダム　ハルダー, エジソン晴彦関谷 フロンティア材料*, Kazuya Saito

    Optica Publishing Group, 2018   2018

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    Authorship：Last author   Publishing type：Research paper (international conference proceedings)   Publisher：OSA Advanced Photonics Congress  

  • Investigation of Optical Properties in Sn, Sb, Pb and Bi Doped Silica Glasses Aiming Visible Fiber Laser Reviewed

    エジソン　晴彦　関谷, Kazuya Saito

    Key Engineering Materials   702   91 - 95   2016.7 （   ISSN:1662-9795 ）

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    Authorship：Last author   Publishing type：Research paper (scientific journal)   Publisher：Trans Tech Publications  

  • 空孔構造マルチコア光ファイバ技術 Reviewed

    姚　兵 日立金属*, 大薗　和正 日立金属*, 齋藤　和也

    ITUジャーナル   43 ( 11 )   12 - 13   2013.11

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  • Difference in Structural Relaxation Times of Inner Surface and Inner Bulk Region of Silica Glass Arc Tube Reviewed

    Takuya Honma*, Nobuhiro Tamura*, Kazuya Saito, エジソン　晴彦　関谷

    N.J.Glass and Ceram.   48 - 52   2013.3

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

  • Difference in Structural Relaxation Times of Inner Surface and Inner Bulk Region of Silica Glass Arc Tube Reviewed

    Takuya Honma, Nobuhiro Tamura, Kazuya Saito, Edson Sekiya

    New Journal of Glass and Ceramics   3 ( 01 )   48 - 52   2013 （   ISSN:2161-7554   eISSN:2161-7562 ）

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    Publishing type：Research paper (scientific journal)   Publisher：Scientific Research Publishing, Inc.  

    DOI： 10.4236/njgc.2013.31008

    Other Link： http://www.scirp.org/journal/doi.aspx?DOI=10.4236/njgc.2013.31008

  • Preparation and Characterizations of Yb-doped TiO2Photocatalyst Films prepared by RF-Magnetron Sputtering Process Reviewed

    S Yuenyaw, K Saito, E H Sekiya, P Sujaridworakun

    IOP Conference Series: Materials Science and Engineering   18 ( 17 )   172005 - 172005   2011.10 （     eISSN:1757-899X ）

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

    DOI： 10.1088/1757-899x/18/17/172005

  • Facile Catalytic Combustion of Rice Husk and Burning Temperature Dependence of the Ashes Reviewed

    Liangming Xiong, Edson H. Sekiya, Shigetaka Wada, Kazuya Saito

    ACS Applied Materials &amp; Interfaces   1 ( 11 )   2509 - 2518   2009.10 （   ISSN:1944-8244   eISSN:1944-8252 ）

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    Publishing type：Research paper (scientific journal)   Publisher：American Chemical Society (ACS)  

    DOI： 10.1021/am9004623

  • Energy levels of self-trapped holes in amorphous SiO2: fictive temperature dependence Reviewed

    R P Wang, K Saito, A J Ikushima

    Journal of Physics D: Applied Physics   42 ( 9 )   095418 - 095418   2009.4 （   ISSN:0022-3727   eISSN:1361-6463 ）

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

    DOI： 10.1088/0022-3727/42/9/095418

  • Burning Temperature Dependence of Rice Husk Ashes in Structure and Property Reviewed

    Liangming Xiong, Edson Haruhico Sekiya, Pornapa Sujaridworakun, Shigetaka Wada, Kazuya Saito

    Journal of Metals, Materials and Minerals   19 ( 2 )   95 - 99   2009.1

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    Publishing type：Research paper (scientific journal)  

  • Influence of impurity ions on rice husk combustion Reviewed

    Liangming Xiong, Kazuya Saito, Edson H. Sekiya, Pornapa Sujaridworakun, Shigetaka Wada

    Journal of Metals, Materials and Minerals   19 ( 2 )   73 - 77   2009.1

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  • Utilization of rice husk to synthesize high-performance phosphors Reviewed

    Liangming XIONG, Kazuya SAITO, Shigetaka WADA, Edson H. SEKIYA

    Journal of Metals, Materials and Minerals   19 ( 2 )   39 - 43   2009.1

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  • Fabrication of Yb-doped silica glass through the modification of MCVD process Reviewed

    E.H. Sekiya, P. Barua, K. Saito, A.J. Ikushima

    Journal of Non-Crystalline Solids   354 ( 42-44 )   4737 - 4742   2008.11 （   ISSN:0022-3093 ）

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

    DOI： 10.1016/j.jnoncrysol.2008.04.045

  • Characterization of Yb3+ clusters in silica glass preforms

    V. Petit, T. Okazaki, E.H. Sekiya, R. Bacus, K. Saito, A.J. Ikushima

    Optical Materials   31 ( 2 )   300 - 305   2008.10 （   ISSN:0925-3467 ）

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    DOI： 10.1016/j.optmat.2008.04.012

  • Improvement of Yb3+doped optical fiber preforms by using MCVD method Reviewed

    V. Petit, E. H. Sekiya, T. Okazaki, R. Bacus, P. Barua, B. Yao, K. Ohsono, K. Saito

    SPIE Proceedings   2008.4 （   ISSN:0277-786X ）

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

    DOI： 10.1117/12.780920

  • Fictive temperature dependences of optical properties in Yb-doped silica glass

    K. Saito, R. Yamamoto, N. Kamiya, E. H. Sekiya, P. Barua

    SPIE Proceedings   2008.4 （   ISSN:0277-786X ）

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

    DOI： 10.1117/12.780704

  • Fictive temperature dependences of optical properties in Yb-doped silica glass Reviewed

    Kazuya Saito, R. Yamamoto*, N. Kamiya*, エジソン　晴彦　関谷, P. Barua*

    Proc. SPIE 6998   69981J   1 - 8   2008

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  • Improvement of Yb3+ doped optical fiber performs b using MCVD method Reviewed

    V. Petit*, エジソン　晴彦　関谷, T. Okazaki*, P. Barua*, B. Yao*, K. Ohsono*, Kazuya Saito

    Proc. SPIE 6998 69980A-1-8   2008

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  • Influences of Yb3+ ion concentration on the spectroscopic properties of silica glass Reviewed

    P. Barua*, エジソン　晴彦　関谷, Kazuya Saito, A. J. Ikushima*

    Journal of Non-Crystalline Solids   354   4760 - 4764   2008

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  • Fabrication of Yb-doped silica glass through the modification of MCVD process Reviewed

    エジソン　晴彦　関谷, P. Barua*, Kazuya Saito, A. J. Ikushima*

    Journal of Non-Crystalline Solids   354   4737 - 4742.   2008

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  • Characterization of Yb3+ clusters in silica glass performs Reviewed

    V. Petit*, T. Okazaki*, エジソン　晴彦　関谷, R. Bacus*, Kazuya Saito, A. J. Ikushima*

    Optical Materials   31   300 - 305   2008

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  • Mid-infrared spectroscopic detection of refractive index in a CO2 laser-written long-period fiber grating Reviewed

    T. Hirose*, Kazuya Saito, K. Takada*

    Electronics Letters   44   1187 - 1188   2008

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  • Mass fabrication of homogeneously Yb-doped silica nanoparticles and their spectroscopic properties Reviewed

    熊　良明, エジソン　晴彦　関谷, Kazuya Saito

    Nanotechnology   20   015605 - 1   2008

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  • Mid-infrared spectroscopic detection of refractive index in CO2 laser-written long-period fibre grating Reviewed

    T. Hirose, K. Saito, K. Takada

    Electronics Letters   44 ( 20 )   1187 - 1187   2008 （   ISSN:0013-5194 ）

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    Publishing type：Research paper (scientific journal)   Publisher：Institution of Engineering and Technology (IET)  

    DOI： 10.1049/el:20081489

  • Refractive index and density changes in silica glass by halogen doping Reviewed

    Hiroshi Kakiuchida, Edson. H. Sekiya, Noriaki Shimodaira, Kazuya Saito, Akira. J. Ikushima

    Journal of Non-Crystalline Solids   353 ( 5-7 )   568 - 572   2007.4 （   ISSN:0022-3093 ）

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

    The refractive index and density of halogen-doped silica glasses were measured as a function of fictive temperature, and the relationship between the refractive index and density was discussed on the basis of the Lorentz-Lorenz formula. The effect of halogen doping on the change in the refractive index was divided into two parts. The refractive index change was found to be strongly affected by structural rearrangement resulting from the termination of Si-O-Si bondings by halogens, as well as by the mean polarizability change caused by replacing oxygen with halogen. © 2007 Elsevier B.V. All rights reserved.

    DOI： 10.1016/j.jnoncrysol.2006.10.025

  • Structure and physical properties of Yb-doped silica glass Reviewed

    Kazuya Saito, エジソン　晴彦　関谷, P. Barua*, A. J. Ikushima*

    Proc. of XXIst International Congress on Glass,J7   2007

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  • Structure and physical properties of sputter-deposited silica glss Reviewed

    A. J. Ikushima*, T. Hirose*, Kazuya Saito

    Proc. of XXIst International Congress on Glass,J63   2007

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  • Refractive-index and density changes of silica glass by halogen doping Reviewed

    H. Kakiuchida*, エジソン　晴彦　関谷, N. Shimodaira*, Kazuya Saito, A. J. Ikushima*

    Journal of Non-Crystalline Solids   353   568 - 572.   2007

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  • Fabrication of long-period fiber grating by CO2 laser-annealing in fiber-drawing process Reviewed

    T. Hirose*, Kazuya Saito, S. Kojima*, Y. Bing*, K. Ohsono*, S. Sato*, K. Takada*, A. J. Ikushima*

    Electronics Letters   43   443 - 445   2007

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  • Density anomaly and microscopic structure in fluorine doped silica glass Reviewed

    N. Shimodaira*, H. Kakiuchida*, Kazuya Saito, A. J. Ikushima*

    Proc. of XXIst International Congress on Glass   8   2007

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  • Structural relaxation in sputter-deposited silica glass Reviewed

    Tomohiro Hirose*, Kazuya Saito, Akira J. Ikushima*

    Journal of Non-crystalline Solids   352   2198   2006

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  • Microscopic structural changes of SiO2 glasses as a　function of temperature investigated by in situ Raman spectroscopy Reviewed

    N. Shimodaira*, Kazuya Saito, エジソン　晴彦　関谷, A.J. Ikushima*

    Physical Review B   73   214206 - 1   2006

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  • Distributions of Self-Trapped Holes Continuums in Silica Glass Reviewed

    R. Wang*, Kazuya Saito

    Journal of Applied Physics   ( 100 )   013706 - 1   2006

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  • High-temperature treatment of hydrogen loaded GeO2:SiO2 glasses for photonic device fabrication Reviewed

    M. Fokine*, H. Suzuki*, T. Goto*, Kazuya Saito, A. J. Ikushima*

    Journal of Non-Crystalline Solids   352   494 - 499.   2006

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  • Waveguide writing by CO2 laser annealing on sputtered silica film Reviewed

    T.Hirose*, M.Fokine*, Kazuya Saito, A.J.Ikushima*

    Journal of Non-crystalline Solids   352   664   2006

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  • Control of glass forming process during fiber drawing to reduce the Rayleigh scattering loss Reviewed

    Kazuya Saito, エジソン　晴彦　関谷, A. J. Ikushima*, K. Ohsono 日立電線*, Y. Kurosawa 日立電線*

    Journal of the American Ceramic Society   89   65 - 69   2005

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  • Effects of fictive temperature and halogen doping on the boson peak in silica glass Reviewed

    N. Shimodaira 博士3*, Kazuya Saito, N. Hiramitsu H13学部卒業 槌屋*, S. Matsushita H15学部卒業 中部電力*, A. J. Ikushima*

    Physical Review B   71   024209 - 1   2005

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  • Effects of fictive temperature and halogen doping on the boson peak in silica glass Reviewed

    N. Shimodaira 博士課程学生*, Kazuya Saito, N. Hiramitsu 元本学修士学生*, S. Matsushita 元本学学部学生*, A. J. Ikushima*

    Physical Review B   71 ( 2 )   024209 - 1   2005

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  • Refractive index and density in F- and Cl-doped silica glasses Reviewed

    H. Kakiuchida*, N. Shimodaira*, エジソン　晴彦　関谷, Kazuya Saito, A. J. Ikushima*

    Applied Physics Letters   86   161907   2005

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  • Fluorine-doping concentration and fictive temperature dependence of self-trapped holes in SiO2 glasses. Reviewed

    R. P. Wang*, N. Tai*, Kazuya Saito, A. J. Ikushima*

    Journal of Applied Physics   98   23701   2005

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  • Photo-bleaching of self-trapped holes in SiO2 glass Reviewed

    R. P. Wang*, Kazuya Saito, A. J. Ikushima*

    Journal of Non-Crystalline Solids   351   1569   2005

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  • Thermally induced second-order nonlinearity in silica-based glasses Reviewed

    M. Fokine*, Kazuya Saito, A. Ikushima*

    Applied Physics Letters   87   171907   2005

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  • シリカガラスの構造多様性とその光デバイスへの応用 Reviewed

    齋藤　和也

    機能材料   11   64   2005

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  • Defect formation and recovery processes in hydrogen-loaded silica fibers Reviewed

    Kazuya Saito, M. Ito H14学部卒業 デンソー*, A. J. Ikushima*, S. Funahashi 三菱電線*, K. Imamura 三菱電線*

    Journal of Non-Crystalline Solids   347   289 - 293   2004

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  • Refractive index, density, and polarizability of silica glass with various fictive temperatures Reviewed

    H. Kakiuchida*, Kazuya Saito, A. Ikushima*

    Japanese Journal of Applied Physics.Part 2   43   L743   2004

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  • Density and concentration fluctuations in F-doped SiO2 glass Reviewed

    T. Watanabe*, Kazuya Saito, A. J. Ikushima*

    Journal of Applied Physics   95 ( 5 )   2432 - 2435   2004

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  • Specific Volume of Fluorine-Doped Silca Glass with Various Fictive Temperatures Reviewed

    Hiroshi Kakiuchida*, Kazuya Saito, Akira J. Ikushima*

    Japanese Journal of Applied Physics.Part 2   43 ( 4A )   L464 - L467   2004

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  • Structural relaxations in silica glass Reviewed

    Akira J. Ikushima*, Kazuya Saito

    Slow Dynamics in Complex Systems, 3rd International Symposium   571 - 575   2004

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  • Refractive index, density and polarizability of silica glass with various fictive temperature Reviewed

    Hiroshi Kakiuchida*, Kazuya Saito, Akira J. Ikushima*

    Japanese Journal of Applied Physics.Part 2   43 ( 6A )   L743 - L745   2004

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  • Approach for reducing the Rayleigh scattering loss in optical fibers Reviewed

    Kazuya Saito, Masafumi Yamaguchi, A. J. Ikushima*, K. Ohsono Optoelectronic system lab, Hitachi Cable Ltd.*, Y. Kurosawa Optoelectronic system lab, Hitachi Cable Ltd.*

    Journal of Applied Physics   95 ( 4 )   1733 - 1735   2004

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  • Structural change of OH-free fused quartz tube by blowing with hydrogen-oxygen flame Reviewed

    N. Kuzuu 福井大学*, Y. Kokubo 福井大学*, I. Serizawa 福井大学*, L. H. Zeng 福井大学*, K. Fujii 福井大学*, Masafumi Yamaguchi, Kazuya Saito, A. J. Ikushima*

    Journal of Non-Crystalline Solids   333   115 - 123   2004

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  • Early stage of phase separation of aluminoborosilicate glass for liquid crystal display substrate Reviewed

    Y. Kato 日本電気硝子*, H. Yamazaki 日本電気硝子*, T. Watanabe*, Kazuya Saito, A. J. Ikushima*

    Journal of the American Ceramic Society   88   473 - 477   2004

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  • Structural relaxation in silica glass Reviewed

    A. J. Ikushima*, Kazuya Saito, H. Kakiuchida*

    Proc.of the 13th International Symposium on Slow Dynamics in Complex Systems (2003)   2003

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    Publishing type：Research paper (international conference proceedings)  

  • Fictive temperature dependence of density fluctuation in SiO2 glass Reviewed

    T. Watanabe*, Kazuya Saito, A. J. Ikushima*

    Journal of Applied Physics   94 ( 8 )   4824 - 4827   2003

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  • Fictive-temperature-dependence of photoinduced self-trapped holes in a-SiO2 Reviewed

    Masafumi Yamaguchi, Kazuya Saito, A. J. Ikushima*

    Physical Review B   68   153204   2003

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  • Effect of Chlorine on Rayleigh Scattering Reduction in Silica Glass Reviewed

    Hiroshi Kakiuchida*, エジソン　晴彦　関谷, Kazuya Saito, Akira J. Ikushima*

    Japanese Journal of Applied Physics.Part 2   42 ( 12B )   L1526 - L1528   2003

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  • Limit of the Rayleigh scattering loss in silica fiber Reviewed

    Kazuya Saito, H. Yamaguchi*, K. Kakiuchida*, A. J. Ikushima*, K. Ohsono Hitachi Cable, Ltd.*, Y. Kurosawa Hitachi Cable, Ltd.*

    Applied Physics Letters   83 ( 25 )   5175 - 5177   2003

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  • Reyleigh Scattering in Fluorine-Doped Silica Glass Reviewed

    Hiroshi Kakiuchida*, Kazuya Saito, Akira J. Ikushima*

    Japanese Journal of Applied Physics.Part 1   42 ( 10 )   6516 - 6517   2003

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  • Silica waveguides fabricated by oxidization of selectively anodized porous silicon Reviewed

    Seiichi Nagata*, Shinobu Matsushita ハイテック*, Kazuya Saito, Yoshio Ohshita, Yoshinobu Maeda*, Masafumi Yamaguchi, Akira J. Ikushima*

    Applied Physics Letters   82 ( 16 )   2559 - 2561   2003

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  • Fictive temperature dependence of structural relaxation in silica glass Reviewed

    H. Kakiuchida*, Kazuya Saito, A. J. Ikushima*

    Journal of Applied Physics   94   1705 - 1708   2003

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  • Precise determination of fictive temperature of silica glass by infrared absorption spectrum Reviewed

    H. Kakiuchida*, Kazuya Saito, A. J. Ikushima*

    Journal of Applied Physics   93   777 - 779   2003

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  • Raman spectra of fluorine-doped silica glasses with various fictive temperatures Reviewed

    N. Shimodaira Asahi Glass Co. Ltd.*, Kazuya Saito, A. J. Ikushima*

    Journal of Applied Physics   91 ( 6 )   3522 - 3525   2002.3

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  • Effects of fluorine on structure, structural relaxation, and absorption edge in silica glass Reviewed

    Kazuya Saito, A. J. Ikushima*

    Journal of Applied Physics   91 ( 8 )   4886 - 4890   2002

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  • Formation and relaxation processes of photoinduced defects in a Ge-doped SiO2 glass Reviewed

    Masafumi Yamaguchi, Kazuya Saito, A. J. Ikushima*

    Physical Review B   66   132106 - 1   2002

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  • Local structural relaxation around OH in silica glass Reviewed

    H. Kakiuchida*, Kazuya Saito, A. J. Ikushima*

    Japanese Journal of Applied Physics.Part 1   41   2993 - 2998   2002

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  • Effects of halogen doping on structure of silica glass as a photonic material Reviewed

    H. Kakiuchida*, Kazuya Saito, N. Hiramitsu*, A. J. Ikushima*

    SPIE   4833   504 - 512   2002

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  • Rayleigh scattering in fluorine-doped silica glass Reviewed

    H. Kakiuchida*, Kazuya Saito, A. J. Ikushima*

    SPIE   4905   355 - 362   2002

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  • Precise determination of fictive temperature of silica glass by infrared absorption spectrum Reviewed

    H. Kakiuchida*, Kazuya Saito, A. J. Ikushima*

    Journal of Applied Physics   93   777 - 779   2002

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  • Study of defect formation/relaxation processes in Ge-doped SiO2 by ArF laser irradiation Reviewed

    Makoto Yamaguchi*, Kazuya Saito, Akira J. Ikushim*

    Proceedings of SPIE, Design, Fabrication, and Characterization of Photonic Devices Ⅱ   300 - 307   2001

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

  • Toward ultra-lucent optical fibers Reviewed

    Akira J. Ikushima*, Kazuya Saito, Hiroshi Kakiuchida*

    Proceedings of SPIE, Design, Fabrication, and Characterization of Photonic DevicesⅡ   288 - 299   2001

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

  • Fictive temperature dependence of photo-induced defects in Ge:SiO2 glass Reviewed

    Noriaki Horiuchi*, Kazuya Saito, Akira J. Ikushima*

    Proceedings of SPIE,Design, Fabrication, and Characterization of Photonic Devices   4594   423 - 431   2001

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

  • Absorption edge in silica glass Reviewed

    Kazuya Saito, Akira J. Ikushima*

    Physical Review B   62 ( 13 )   8584 - 8587   2000.10

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  • シリカガラスの構造無秩序性と構造緩和 Reviewed

    齋藤　和也, 垣内田洋*, 生嶋明*

    New Glass   15 ( 3 )   14 - 18   2000.9

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  • Silica glass : A material for photonics Reviewed

    Akira J. Ikushima*, Takumi Fujiwara 長岡技術科学大学*, Kazuya Saito

    Journal of Applied Physics (Applied Physics Reviews)   88 ( 3 )   1201 - 1213   2000.8

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  • Structural disorder and optical properties in silica glass Reviewed

    Kazuya Saito, Hiroshi Kakiuchida*, Akira J. Ikushima*

    25th Australian Conference on Optical Fiber Technology   57 - 58   2000

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  • Effects of aluminum impurity on the structural relaxation in silica glass Reviewed

    Kazuya Saito, Naoki Ogawa 修士2*, Akira J. Ikushima*, Yasushi Tsurita 三菱化学株式会社*, Keiji Yamahara 三菱化学株式会社*

    Journal of Non-Crystalline Solids   270   60 - 65   2000

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  • Silica Glass for Photonics Reviewed

    Kazuya Saito, Akira J. Ikushima*

    First Asia-Pacific Conference on Fundamental Problems of opto-and microelectronics   214 - 219   2000

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  • VUV transmittance of fused silica glass influenced by thermal disorder Reviewed

    Noriaki Shimodaira Asahi Glass Co. Ltd.*, Kazuya Saito, Akira J. Ikushima*, Toru Kamihori Asahi Glass Co. Ltd.*, Shuhei Yoshizawa Asahi Glass Co. Ltd.*

    Proceedings of SPIE on Microlithography   4000   1553 - 1559   1999

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    Publishing type：Research paper (international conference proceedings)   Publisher：Society of Photo-Optical Instrumentation Engineers  

  • Development of a wide-temperature range VUV and UV spectrophotometer and its applications to silica glass Reviewed

    Kazuya Saito, A. J. Ikushima*

    Journal of Non-Crystalline Solids   259   81 - 86   1999

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  • シリカガラスの構造緩和と光物性 Reviewed

    齋藤　和也, 生嶋明*

    New Glass   14 ( 4 )   36 - 41   1999

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  • シリカガラスはどこまで透明にできるか Reviewed

    生嶋明*, 齋藤　和也

    応用物理   68 ( 10 )   1157 - 1161   1999

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  • Effects of preirradiation and thermal annealing on photoinduced defects creation in synthetic silica glass Reviewed

    Kazuya Saito, A. J. Ikushima*, T. Kotani 北川工業(株)*, T. Miura 北川工業(株)*

    Journal of Applied Physics   86 ( 7 )   3497 - 3501   1999

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  • Improvement of the ultraviolet-proof property of silica glass fibers for ArF excimer-laser applications Reviewed

    Kazuya Saito, A. J. Ikushima*, T. Kotani 北川工業(株)*, T. Miura 北川工業(株)*

    Optics Letters   24 ( 23 )   1678 - 1680   1999

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  • Dielectric relaxation in silica glass Reviewed

    H. Kakiuchida 博士3*, Kazuya Saito, A. J. Ikushima*

    Journal of Applied Physics   86 ( 11 )   5983 - 5987   1999

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  • Structural Relaxation Enhanced by Impurities in Silica Glass Reviewed

    Kazuya Saito, Akira Ikushima*

    AIP Conference Proceedings CP469"Slow Dynamics in Comples Systems"International Symposium   507 - 512   1999

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  • 超低損失ファイバ素材の開発 Reviewed

    齋藤　和也, 生嶋明*

    機械の研究   51 ( 11 )   33 - 38   1999

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  • Structural Relaxation enhanced by Cl ions in Silica Glass Reviewed

    Kazuya Saito, A. J. Ikushima*

    Applied Physics Letters   73 ( 9 )   1209 - 1211   1998

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  • Light Scattering Studies on the Glass Transition and the Structure in Silica Glass Reviewed

    Kazuya Saito, H. Kakiuchida 博士1*, A. J Ikushima*

    Japanese Journal of Applied Physics.Part 1   37 ( S1 )   32 - 35   1998

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  • Light-Scattering Study of the Glass Transition in Silica, with Practical Implications Reviewed

    Kazuya Saito, H. Kakiuchida 博士2*, A. J. Ikushima*

    Journal of Applied Physics   84 ( 6 )   3107 - 3112   1998

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  • Investigation of the Origin of the Rayleigh Scattering in SiO2 Glass Reviewed

    Kazuya Saito, H. Kakiuchida 博士1*, A. J Ikushima*

    Journal of Non-Crystalline Solids   222   329 - 334   1997

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  • これからの通信用光ファイバー－究極の透明性を求めて－ Reviewed

    齋藤　和也

    現代化学   317   31 - 36   1997

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    Authorship：Lead author   Publishing type：Research paper (scientific journal)  

  • Structural Relaxation of the Frozen-in Density Fluctuations in Silica Glass Reviewed

    Kazuya Saito, A. J. Ikushima*

    Progress of Theoretical Physics   ( 126 )   277 - 280   1997

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    Authorship：Lead author   Publishing type：Research paper (scientific journal)  

  • A New Method of Developing Ultralow-Loss Glasses Reviewed

    Kazuya Saito, A. J. Ikushima*, T. Ito 豊田中央研究所*, A. Itoh 豊田中央研究所*

    Journal of Applied Physics   81 ( 11 )   7129 - 7134   1997

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  • Reduction of light-Scattering Loss in Silica Glass by the Structural relaxation of "Frozen-in"Density Fluctuations Reviewed

    Kazuya Saito, A. J. Ikushima*

    Applied Physics Letters   70 ( 26 )   3504 - 3506   1997

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    Authorship：Lead author   Publishing type：Research paper (scientific journal)  

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MISC

  • Effects of Ge-doping on suppressing photodarkening in silica glasses

    Mori Takehiro, Sekiya Edson Haruhico, Saito Kazuya

    JSAP Annual Meetings Extended Abstracts   2020.1   3233 - 3233   2020.2 （     eISSN:2436-7613 ）

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    Language：Japanese   Publisher：The Japan Society of Applied Physics  

    DOI： 10.11470/jsapmeeting.2020.1.0_3233

  • Fabrication and optical analysis of bismuth doped germanosilicate preforms to develop ~830nm fiber laser

    Arindam Halder, Edson H. Sekiya, Kazuya Saito

    Advanced Photonics 2018 (BGPP, IPR, NP, NOMA, Sensors, Networks, SPPCom, SOF)   2018

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    Authorship：Last author   Publisher：OSA  

    DOI： 10.1364/bgppm.2018.jtu5a.62

  • いまさら聞けないガラス講座 ガラス中の光散乱 : 光散乱の起因—Light Scattering in glasses : Origin of the Rayleigh scattering

    齋藤 和也

    New glass   32 ( 3 )   30 - 34   2017.11 （   ISSN:0914-6563 ）

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    Language：Japanese   Publisher：ニューガラスフォーラム  

  • Investigation of Optical Properties in Sn, Sb, Pb and Bi Doped Silica Glasses Aiming Visible Fiber Laser

    Edson Haruhico Sekiya, Kazuya Saito

    Key Engineering Materials   702   91 - 95   2016.7 （     eISSN:1662-9795 ）

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    Authorship：Last author   Publisher：Trans Tech Publications, Ltd.  

    Emission spectra of Sn, Sb, Pb and Bi doped silica glasses co-doped with Al and P prepared by modified chemical vapor-phase deposition (MCVD) using solution doping technique are presented. Bi doped silica glasses present emission/excitation (Em/Ex) bands around 470/(330, 220nm) 600/(470, 350, 270nm), 730 and 830/(820, 420, 380, 250nm), with the intensity ratio of these bands depends on the composition, indicating that different emission sources (valence states or defects) are present together. The Em/Ex of Sb doped silica glasses also depend on composition, and are similar of Bi doped silica glasses. The lifetime at 830 and 1400 in Bi or Sb doped silica glasses are similar and around 60 and 850μs, respectively. The lifetime around 600nm was 3.2 and 11μs, respectively to Bi and Sb doped silica glasses. The Sn doped silica glass present Em/Ex bands around 305/265nm, 400/(270, 340nm) and 430/280nm. The Pb doped silica glass present Em/Ex around 370/290nm and 540/320nm. No significant change in the emission bands in the visible range are observed when the Sn or Pb doped silica glass are co-doped with Al or P. The present results of Em/Ex suggest that Bi and Sb can be candidate for fiber lasing in visible range (around 600nm) using the available LD pumping (ex: 405nm). Despite Sn and Pb doping shows strong emission around 400nm, unfortunately until now there is no LD that can be used as pumping source.

    DOI： 10.4028/www.scientific.net/kem.702.91

  • Optical characteristics of Gold-Doped Silica glass

    FUTAMURA KENTA, SAITO KAZUYA, SEKIYA EDSON

    JSAP Annual Meetings Extended Abstracts   2015.2   571 - 571   2015.8 （     eISSN:2436-7613 ）

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    Language：Japanese   Publisher：The Japan Society of Applied Physics  

    DOI： 10.11470/jsapmeeting.2015.2.0_571

  • シリカガラスの構造と構造緩和時間の制御─超低損失光ファイバを目指して─ Reviewed

    齋藤　和也

    セラミックス   49 ( 4 )   321 - 324   2014.4

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    Authorship：Lead author   Publishing type：Article, review, commentary, editorial, etc. (other)   Publisher：日本セラミックス協会  

  • Photonic bandgap fiber lasers and multicore fiber lasers for next generation high power lasers

    A. Shirakawa, M. Chen, Y. Suzuki, K. Sato, X. Fan, H. Tünnermann, M. Karow, C. B. Olausson, S. R. Petersen, T. Alkeskjold, K. Saito

    Advanced Photonics   2014

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    Authorship：Last author   Publisher：OSA  

    DOI： 10.1364/sof.2014.sotu4b.2

  • いまさら聞けないガラス講座 仮想温度とは何か?—Fictive temperature : a good indicator for the glass structure and properties

    齋藤 和也

    New glass   27 ( 1 )   49 - 52   2012.3 （   ISSN:0914-6563 ）

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    Language：Japanese   Publisher：ニューガラスフォーラム  

  • Fabrication of long-period fibre grating by CO2 laser-annealing in fibre-drawing process

    T. Hirose, K. Saito, S. Kojima, B. Yao, K. Ohsono, S. Sato, K. Takada, A. J. Ikushima

    ELECTRONICS LETTERS   43 ( 8 )   443 - 445   2007.4 （   ISSN:0013-5194 ）

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    Language：English   Publisher：INSTITUTION ENGINEERING TECHNOLOGY-IET  

    Long-period fibre grating (LPFG) writing by a CO2 laser-annealing using a fibre-drawing process is demonstrated. The fibre in the drawing process was irradiated periodically by a CO2 laser to modify the refractive index. An LPFG with transmission loss of - 10 dB and full width at half-maximum of 13 nm has been fabricated. Results show that the refractive index change was induced by stress at the moment of laser annealing.

    DOI： 10.1049/el:20073771

  • Fictive temperature dependence of density fluctuation in SiO2 glass

    T Watanabe, K Saito, AJ Ikushima

    JOURNAL OF APPLIED PHYSICS   94 ( 8 )   4824 - 4827   2003.10 （   ISSN:0021-8979 ）

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    Language：English   Publisher：AMER INST PHYSICS  

    Fictive temperature dependence of density fluctuation in SiO2 glass was investigated by the small-angle x-ray scattering measurement. The density fluctuation in SiO2 glass varies linearly to the fictive temperature. Contribution of structural relaxation to the density fluctuation is larger than that of phonons. Isothermal compressibility, relaxational isothermal compressibility and high-frequency adiabatic compressibility are estimated. If N, -, and Delta represent the number of SiO4/2 unit, average and difference from average, respectively, the density fluctuation in SiO2 glass is less than 3.6% as (&UDelta;N) over bar)(2)/(N) over bar. (C) 2003 American Institute of Physics.

    DOI： 10.1063/1.1608477

  • <CLOSE UP>先端に、人 光ファイバーの低損失化を推進 豊田工業大学大学院工学研究科 助教授 斉藤和也

    安立 なつ美, 斉藤 和也

    工業材料 = Engineering materials   49 ( 8 )   1 - 4   2001.8 （   ISSN:0452-2834 ）

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    Language：Japanese   Publisher：日刊工業新聞社  

  • Formation/relaxation processes of photo-induced defects in a Ge-doped SiO_2 glass.

    Yamaguchi M., Saito K., Ikushima J.

    Meeting Abstracts of the Physical Society of Japan   56.2.4   830   2001 （     eISSN:2189-0803 ）

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    Language：Japanese   Publisher：The Physical Society of Japan  

    DOI： 10.11316/jpsgaiyo.56.2.4.0_830_2

  • Relation between inequilibrium structure and its relaxation process in silica glass

    Kakiuchida H., Saito K., Ikushima J.

    Meeting Abstracts of the Physical Society of Japan   56.2.2   269   2001 （     eISSN:2189-0803 ）

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    Language：Japanese   Publisher：The Physical Society of Japan  

    DOI： 10.11316/jpsgaiyo.56.2.2.0_269_1

  • Effects of Fluorine on Structural Disorder and Structural Relaxation of Silica Glass

    Saito K., Hiramitsu N., Ikushima A. J.

    Meeting Abstracts of the Physical Society of Japan   56.2.2   269   2001 （     eISSN:2189-0803 ）

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    Language：Japanese   Publisher：The Physical Society of Japan  

    DOI： 10.11316/jpsgaiyo.56.2.2.0_269_2

  • Structural Disorder in Silica Glass

    Saito K., Kakiuchida H., Ikushima A. J.

    Meeting Abstracts of the Physical Society of Japan   55.2.2   290   2000 （     eISSN:2189-0803 ）

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    Language：Japanese   Publisher：The Physical Society of Japan  

    DOI： 10.11316/jpsgaiyo.55.2.2.0_290_1

  • これからの通信用光ファイバ—第25回 応用科学学会秋季講演会

    斉藤 和也

    応用科学学会誌 = Journal of the Japan Society of Applied Science   11 ( 2 )   26 - 31   1997.11 （   ISSN:0914-4013 ）

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    Language：Japanese   Publisher：応用科学学会  

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Books

  • 非晶質SiO2材料応用ハンドブック　

    齋藤　和也, 垣内田洋 博士２年*, 生嶋明*（9.シリカガラスのキャラクタリゼーション,9.8高温物性）

    リアライズ社  1999.5 

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    Book type：Scholarly book

Presentations

  • B/YbB/YbAlB 添加シリカガラスにおける X 線誘起欠陥と局所構造の研究

    山田圭吾、 荒川修一、 齋藤和也

    The 34th Meeting on Glasses for Photonics 2024  ( 東京 )   2024.1 

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    Presentation type：Oral presentation (general)  

  • Dy添加シリカガラスにおけるB添加によるフォトダークニング抑制効果

    山田圭吾、齋藤和也

    第８４回応物秋季学術講演会  ( 熊本 )   2023.9 

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    Presentation type：Oral presentation (general)  

  • Ge関連欠陥のフォトブリーチング

    長壁 摩弥、 高橋 孝汰、齋藤 和也

    第８４回応物秋季学術講演会  ( 熊本 )   2023.9 

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    Presentation type：Oral presentation (general)  

  • Dy添加シリカガラスのB共添加効果

    山田圭吾, 齋藤和也

    The 33rd Meeting on Glasses for Photonics  ( 豊田工業大学 )   2023.3  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)  

  • Ge添加シリカガラスにおける紫外線誘起欠陥の熱アニーリング

    長壁摩耶, 齋藤和也

    The 33rd Meeting on Glasses for Photonics  ( 豊田工業大学 )   2023.3  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)  

  • ブリルアン散乱光を用いた分布型光ファイバセンサにおける構造緩和および応力緩和の影響

    山田圭吾, 齋藤和也

    第83回応用物理学会秋季学術講演会  ( 東北大学 )   2022.9  応用物理学会

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    Presentation type：Oral presentation (general)  

  • シリカガラスにおけるGe添加フォトダークニング抑制効果

    森毅弘*, エジソン晴彦関谷*, 齋藤　和也

    第67回 応用物理学会春季学術講演会  ( 上智大学四谷キャンパス )   2020.3  応用物理学会

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    Presentation type：Oral presentation (general)  

  • ファイバレーザー/アンプ用ガラス素材の局所構造と光学特性 Invited

    齋藤　和也

    レーザー学会第 538 回研究会  ( 所:名古屋大学 東山キャンパス内ベンチャービジネスラボラトリー )   2019.11  レーザー学会

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    Presentation type：Oral presentation (invited, special)  

  • シリカガラスのガラス形成過程とファイバの低損失化 Invited

    齋藤　和也

    電子情報通信学会 光通信システム研究会（OCS研究会）  ( 道東経済センタービル 第１中会議室（北海道釧路市） )   2019.8  電子情報通信学会

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    Presentation type：Oral presentation (invited, special)  

  • ガラス転移と物性制御 Invited

    齋藤　和也

    第124回(平成29年度第4回)ニューガラスセミナー  ( 東京都新宿区 )   2018.3  ニューガラスフォーラム

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    Presentation type：Oral presentation (invited, special)  

  • Al co-doping influence on photo induce absorption of Mg doped silica glasses

    エジソン　晴彦　関谷, 岡崎朋也*, Kazuya Saito

    第78回応用物理学会秋季学術講演会  ( 福岡県福岡市 )   2017.9  応用物理学会

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    Presentation type：Oral presentation (general)  

  • Yb添加シリカガラスにおけるYb-O結合距離とフォトダークニングの相関

    岡崎朋也 フロンティア材料*, エジソン　晴彦　関谷, Kazuya Saito

    第78回応用物理学会秋季学術講演会  ( 福岡県福岡市 )   2017.9  応用物理学会

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    Presentation type：Oral presentation (general)  

  • 共添加シリカガラスにおける欠陥抑制効果 International conference

    横瀬啓*, エジソン　晴彦　関谷, Kazuya Saito

    第78回応用物理学会秋季学術講演会  ( 福岡県福岡市 )   2017.9  応用物理学会

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    Presentation type：Oral presentation (general)  

  • Mn添加シリカガラスにおけるMnイオンの価数制御

    原田 鳳陽*, 岡崎 朋也*, エジソン　晴彦　関谷, Kazuya Saito

    第78回応用物理学会秋季学術講演会  ( 福岡県福岡市 )   2017.9  応用物理学会

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    Presentation type：Oral presentation (general)  

  • 衛星間光通信用ファイバーアンプのガラス開発 Invited International conference

    齋藤　和也

    平成29年度第1回ガラス科学技術研究会  ( 東京都新宿区 )   2017.7  ニューガラスフォーラム

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    Presentation type：Oral presentation (invited, special)  

  • Photo-induced absorption on Mg doped silica glasses International conference

    Edson Haruhico Sekiya, Kazuya Saito

    The 64th JSAP Spring Meeting  ( 横浜 )   2017.3 

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    Presentation type：Oral presentation (general)  

  • Yb添加シリカガラスにおけるAl共添加効果 International conference

    岡崎朋也*, エジソン　晴彦　関谷, 齋藤　和也

    第64回応用物理学会春季学術講演会  ( 神奈川県横浜市 )   2017.3 

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  • 高出力ファイバレーザー、衛星間光通信用ファイバアンプ（耐宇宙線）用のガラス開発 Invited International conference

    齋藤　和也

    第3回光材料・応用技術研究会  ( 神奈川県箱根師強羅 )   2016.11 

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    Presentation type：Oral presentation (invited, special)  

  • Investigation of NIR emission in Bi, Sb, Pb and Sn doped silica glasses aiming optical fiber amplifier and laser International conference

    Kazuya Saito, Edson Haruhico Sekiya

    ACO2015  ( Hong Kong )   2015.11 

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  • Investigation of Optical Properties in Sn, Sb, Pb and Bi Doped Silica Glasses Aiming Visible Fiber Laser International conference

    Kazuya Saito, Edson Haruhico Sekiya

    ICG Annual Meeting Bangkok2015  ( Bangkok )   2015.9 

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    Presentation type：Oral presentation (general)  

  • 7コアフォトニック結晶ファイバーレーザーの位相同期特性 International conference

    黒須　雄太 電気通信大学*, 久保内　照雄 電気通信大学*, 佐藤　慶吾 電気通信大学*, 白川　晃 電気通信大学*, 小森　翼 フロンティア材料*, Kazuya Saito

    第15回レーザー学会東京支部研究会  ( 東海大学高輪キャンパス )   2015.3 

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  • ファイバーレーザー用ガラス素材の研究 Invited International conference

    齋藤　和也

    ファイバーレーザー技術専門委員会　第8回委員会  ( 東京 )   2014.8  レーザー学会

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  • Eu添加シリカガラスの光学特性 International conference

    久松知弘 豊工大*, エジソン　晴彦　関谷, 齋藤　和也

    第74回応用物理学会秋季講演会  ( 京都 )   2013.9  日本物理学会

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  • Nd添加シリカガラスの光学特性 International conference

    上水和平 豊工大*, エジソン　晴彦　関谷, 齋藤　和也

    第74回応用物理学会秋季講演会  ( 京都 )   2013.9  日本物理学会

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  • Sm添加シリカガラスの光学特性 International conference

    木久山龍成 豊工大*, エジソン　晴彦　関谷, 齋藤　和也

    第74回応用物理学会秋季講演会  ( 京都 )   2013.9  日本物理学会

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  • Dy添加シリカガラスの光学特性 International conference

    後村圭亮 豊工大*, エジソン　晴彦　関谷, 齋藤　和也

    第74回応用物理学会秋季講演会  ( 京都 )   2013.9  日本物理学会

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  • Photobleaching in Yb-doped silica glass International conference

    Kazuya Saito, D.Minami TTI*, Edson Haruhico Sekiya

    The ２３rd International Congress on Glass  ( Prague )   2013.7  ICG

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    Presentation type：Oral presentation (general)  

  • Al-codoping effects on optical properties of Pr-doped silica glass International conference

    H.Yamazaki TTI*, Edson Haruhico Sekiya, Kazuya Saito

    The 23rd International Congress on Glass  ( Prague )   2013.7  ICG

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  • Crosstalk and Fiber Fuse on Hole Walling Multi Core Fiber International conference

    Edson Haruhico Sekiya, Kazuya Saito

    The 23rd International Congress on Glass  ( Prague )   2013.7  ICG

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  • Photobleaching in Yb-doped silica glass International conference

    D.Minami TTI*, Edson Haruhico Sekiya, Kazuya Saito

    The 23rd Internatilnal Congress on Glass  ( Prague )   2013.7  ICG

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  • マルチコア光ファイバにおける空孔構造の応用 International conference

    姚兵 日立電線*, 大薗和正 日立電線*, 小倉明 日立電線*, エジソン　晴彦　関谷, Kazuya Saito

    電子情報通信学会EXAT研究会  ( 東京芝機械振興会館 )   2013.2  電子情報通信学会

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  • 空孔遮蔽型コア拡大マルチコアファイバの開発 International conference

    大薗和正 日立電線*, 姚兵 日立電線*, 小倉明 日立電線*, エジソン　晴彦　関谷, Kazuya Saito

    光ファイバ応用技術研究所（OFT）  ( 熊本市民会館 )   2012.11  光ファイバ応用技術研究会（OFT）

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  • Large Effective Area Hole-Walled Multi-Core Fibers International conference

    姚兵 日立電線*, 大薗和正 日立電線*, 小倉明 日立電線*, エジソン　晴彦　関谷, Kazuya Saito

    61’IWCS  ( 米国　プロビデンス )   2012.11  61’IWCS

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  • マルチコアファイバ用インターフェイス技術に関する検討 International conference

    渡邉智紀 日立電線*, 小倉明 日立電線*, 姚兵 日立電線*, 大薗和正 日立電線*, エジソン　晴彦　関谷, Kazuya Saito

    電子情報通信学会ソサイエティ大会  ( 富山大学 )   2012.9  電子情報通信学会

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  • Fiber Fuse in Multi Core Fibers International conference

    エジソン　晴彦　関谷, Kazuya Saito, 姚兵 日立電線*, 大薗和正 日立電線*, 小倉明 日立電線*

    光ファイバ応用技術研究会（OFT）  ( サン・リフレ函館 )   2012.8  光ファイバ応用技術研究会（OFT）

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  • マルチコアファイバ用インターフェイスに関する検討 International conference

    小倉明 日立電線*, 姚兵 日立電線*, 大薗和正 日立電線*, 渡邉智紀 日立電線*, エジソン　晴彦　関谷, Kazuya Saito

    光ファイバ応用技術研究会（OFT）  ( サン・リフレ函館 )   2012.8  光ファイバ応用技術研究会（OFT）

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  • シリカガラスのガラス形成過程における構造および物性制御 Invited International conference

    齋藤　和也

    ニューガラスフォーラム　第102回若手懇談会  ( 東京 )   2011 

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  • Mechanisms of photodarkening and methods to investigate the structural changes Invited International conference

    Kazuya Saito

    International Laser Symposium Fiber and Disc  ( Dresden )   2010 

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    Presentation type：Oral presentation (invited, special)  

  • Hole trap center induced by x-ray irradiation on Yb doped silica glass Invited International conference

    Edson Haruhico Sekiya, M. Amano*, Kazuya Saito

    International Congress on Glass  ( Bahia )   2010 

    　More details

    Presentation type：Oral presentation (invited, special)  

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Awards

  • 第30回永井科学技術財団賞

    2013.3   （公財）永井科学技術財団  

    齋藤　和也

  • 応用科学学会 功労賞

    1999.6   応用科学学会   学会運営への貢献を認められたため

    齋藤　和也

Grant-in-Aid for Scientific Research

Subject in charge(Off-campus)

  • 技術と環境

    2023.4 Institution：南山大学