Updated on 2024/11/18

写真a

 
SAIKI,Taku
 
Organization
Faculty of Engineering Science Professor
Title
Professor
Contact information
メールアドレス
Homepage
http://www.microwave.densi.kansai-u.ac.jp/
External link

Degree

  • 博士 ( 2000.3 )

Research Interests

  • Photoluminescence nanoparticle;Solar-pumped laser;Optical Switch controlled by light

  • Axial gap motor

  • Magnetic floating

  • 強磁性

  • ナノ構造金属

  • Thermo electricity generation

  • Metal air cell

  • Optical Switch controlled by light

  • Solar-pumped laser

  • Photoluminescence nanoparticle

  • ;

  • Metal air cell;Thermo electricity generation;Axial-gap generator

  • Axial gap generator

Research Areas

  • Natural Science / Magnetism, superconductivity and strongly correlated systems

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Power engineering

  • 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 / Energy chemistry

Education

  • Osaka University   Graduate School, Division of Engineering

    - 2000

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  • Kansai University   Faculty of Engineering

    - 1995

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  • Osaka University   Graduate School, Division of Engineering

    2000

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Professional Memberships

Papers

  • Production of Cu/Zn Nanoparticles by pulsed Laser Ablation in Liquids and Sintered Cu/Zn Alloy Reviewed

    Taku Saiki, Mitsuru Inada

    J. of Nano Research   Vol. 83   91 - 108   2024.6

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

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  • Analysis for Levitation of EHD and Electrostatic Propulsion Device in Direction of Gravity using Optical Flow Method Reviewed

    SAIKI,Taku

    J. of Electrical Electronics Engineering   Vol.3(1) pp.1-12.   2024.2

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  • Rod-type Ce/Cr/Nd:YAG Ceramic Lasers with White-Light Pump Source Reviewed

    SAIKI,Taku, T. Iwashita, J. Sakamoto, T. Hayashi, T. Nakamachi, Y. Fujimoto, Y. Iida, M. Nakatsuka

    International Journal of Optics   2022 (2022), ID 8480676-1-10.   2022.9

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  • Optimization on Pole Pitch of Magnetic Wheels and Thickness of Metal Plate for Floating and Propulsion System using Permanent Magnets Reviewed

    SAIKI,Taku, Kazumasa Ino, Mitsuru Inada

    Journal of Electromagnetic Waves and Applications   Vol. 36 Iss. 18, 2022, pp.2716-2739.   2022.8

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  • 液中レーザーアブレーションによる酸化亜鉛微粒子の還元・ナノ粒子化と金属空気電池への応用 Reviewed

    谷口誠治, 佐伯 拓, 木村優作, 石井隆太

    光 学   2022,51巻5号 pp.243-251.   2022.5

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  • Axial-flux Generator Using Sintered Fe Nano-polycrystalline Reviewed

    SAIKI,Taku, T. Matsuzaki, T. Yasuki, T. Nakaya, Mituru Inada

    Springer Nature, Journal of Electronic Materials   50 vol.10 (2021) pp.5995-6005.   2021.8

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  • Microchip Nd:YAG and Nd:YVO4 Lasers Pumped by VHG Wavelength-Stabilized Laser Diode Reviewed

    SAIKI,Taku, A. Tatebayashi

    International J. of Optics   Vol. 2020 ID3952435-1-9   2020.8

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  • Production of Reduced Aluminum Nanoparticles from Aluminum oxide by applying high-voltage pulses to solutions Reviewed

    SAIKI,Taku, S. Taniguchi

    Journal of Nano Research   (2020) Vol.63 pp.76-88.   2020.6

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  • Q-switched and Mode-locked Nd/Cr:YAG Ceramic Pulse Laser Reviewed

    SAIKI,Taku, N. Hirota, S. Kanemori, Y. Iida

    International J. of Optics   Vol. 2020 ID 4084587-1-7   2020.2

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  • High-voltage Pulse Generation Using Electrostatic Induction in Capacitor

    SAIKI,Taku

    International Journal of Electrical Components and Energy Conversion   Vol. 5(2), Dec. pp.20-29 (2019)   2019.12

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  • Appearance of ferromagnetic property for Si nano-polycrystalline body and vanishing of electrical resistances at local high frequencies Reviewed

    SAIKI,Taku, Yukio Iida, Mitsuru Inada

    Journal of Nanomaterials   Vol. 2018, ID 9260280, pp1-12.   2018.11

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  • 焼成鉄ナノ多結晶体の磁気特性と高周波電気抵抗の局所的消失 Reviewed

    佐伯拓, 飯田幸雄, 稲田貢

    電気学会A部門   Vol. 138 No. 10 pp.512-520   2018.10

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  • Fabrication of Metal Air Cells Using Sintered Si Nanopaste with Reduced Si Nanoparticles Reviewed

    Vol 45 No.6(2017) pp.364-370. ( 6 )   364 - 370   2017.6

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    Language：Japanese  

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  • Amplification properties of KW Nd/Cr:YAG ceramic multi-stage active-mirror laser using white-light pump source at high temperatures

    T. Saiki, N. Fujiwara, N. Matsuoka, M. Nakatuka, K. Fujioka, Y. Iida

    OPTICS COMMUNICATIONS   387   316 - 321   2017.3

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

    An output peak power of over 1 kW for a Nd/Cr3+:YAG ceramic multi-amplifier system with white-light pumping was obtained. A four-stage active-mirror amplifier system was adapted for obtaining kW laser peak power. Output spectrum of pumping light used was close to that of solar light. Enhancement of saturated output laser power at high temperatures was observed owing to the phonon-assisted cross-relaxation effect. An output laser peak power of 1.6 kW were achieved at a ceramic disk temperature of 100 degrees C. The evaluated optical-optical conversion efficiency for volume of ceramics through which laser passed was 63% for the maximum output laser peak power of 1.6 kW. The laser system will be applicable to solar-pumped lasers with high optical-optical conversion efficiency.

    DOI： 10.1016/j.optcom.2016.12.005

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  • Development of Solar-Pumped Lasers and Its Application Reviewed

    SAIKI,Taku, S. Taniguchi, K. Nakamura, Y. Iida

    Electrical Engineering in Japan   Vol.199(2), Apr. 2017, pp.3-9. ( 10 )   559 - 564   2017.1

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    Language：Japanese   Publisher：The Institute of Electrical Engineers of Japan  

    An energy cycle using solar power and metals has been proposed. High repetitive laser pulses are generated by a solar-pumped laser or a laser generated using solar power, and the laser pulses are irradiated to metal oxides in liquid. We can obtain reduced metal nanoparticles with this method, and solar power is effectively stored as chemical energy. We fabricated Li air fuel cells using sintered Iron or Aluminum nanopaste plates as negative electrodes. Electricity was successfully produced from these cells. The observed maximum output voltage of the Al paste Li air cell was 2.9 V when they were connected to a low load. The Fe or Al paste Li air cells are expected to become common power supplies with high-energy density and high output power.

    DOI： 10.1541/ieejfms.135.559

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    Other Link： https://jlc.jst.go.jp/DN/JLC/20015714440?from=CiNii

  • Development on Solar-pumped Lasers and its Application Reviewed

    Saiki Taku, Taniguchi Seiji, Nakamura Kazuhiro, Iida Yukio

    IEEJ Transactions on Fundamentals and Materials   Vol. 135 No. 10 (2015) pp.559-564. ( 10 )   559 - 564   2015.10

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    Language：Japanese   Publisher：The Institute of Electrical Engineers of Japan  

    An energy cycle using solar power and metals has been proposed. High repetitive laser pulses are generated by a solar-pumped laser or a laser generated using solar power, and the laser pulses are irradiated to metal oxides in liquid. We can obtain reduced metal nanoparticles with this method, and solar power is effectively stored as chemical energy. We fabricated Li air fuel cells using sintered Iron or Aluminum nanopaste plates as negative electrodes. Electricity was successfully produced from these cells. The observed maximum output voltage of the Al paste Li air cell was 2.9 V when they were connected to a low load. The Fe or Al paste Li air cells are expected to become common power supplies with high-energy density and high output power.

    DOI： 10.1541/ieejfms.135.559

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    Other Link： https://jlc.jst.go.jp/DN/JLC/20015714440?from=CiNii

  • Fabrication of Sintered Si Nano-polycrystalline with Reduced Si Nanoparticles and Property of Photoluminescence in Visible Regime for Sintered Si Nano-polycrystalline by Violet Light Excitation Reviewed

    Taku SAIKI, Yukio IIDA

    American Journal of Nano Research and Applications   (2015), 3(5), Aug. , pp.82-88.   2015.8

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  • Enhanced EHD and Electrostatic Propulsion Devices Based on Polarization Effect Using Asymmetrical Metal Structure Reviewed

    Taku Saiki

    J. of Electrical and Electronic Engineering   (2015), 3 (4), Jul. pp.76-86.   2015.7

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  • Electrical Property of Laser-Sintered Nanopastes with Reduced Metal Nanoparticles Prepared by Laser Ablation in Liquids Reviewed

    Taku Saiki, Yukio Iida, Kennan Ri, Marina Yoshida, Yuuki Koga

    Advances in Materials   Vol. 3, No. 6, 2014, pp. 75-88   2014.12

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  • Recyclable metal air fuel cells using sintered magnesium pastes with reduced Mg nanoparticles by high-repetitive ns pulse laser ablation in liquid Reviewed

    T. Saiki, S. Uchida, T. Karita, K. Nakamura, Y. Nishikawa, S. Taniguchi, Y. Iida

    International Journal of Sustainable and Green Energy   Vol.3 No. 6 Dec. (2014) pp.143-149.   2014.12

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  • Increase in Effective Fluorescence Lifetime by Cross-Relaxation Effect Depending on Temperature of Nd/Cr:YAG Ceramic Using White-Light Pump Source Reviewed

    T. Saiki, M. Nakatsuka, K. Fujioka, S. Motokoshi, K. Imasaki, Y. Iida

    Optics and Photonics Letters   (2013), vol. 6 Apr. 1350003-1-15.   2013.4

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  • Hydrogen Production Using Reduced-Iron Nanoparticles by Laser Ablation in Liquids Reviewed

    T. Okada, T. Saiki, S. Taniguchi, T. Ueda, K. Nakamura, Y. Nishikawa, Y. Iida

    ISRN Renewable Energy   Volume 2013 (2013), Article ID 827681-1-7   1 - 7   2013.2

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    Language：English   Publisher：Hindawi Publishing Corporation  

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  • Parameter mapping survey on optimized sensitizing effect of Ce/Cr/Nd:YAG material for solar-pumped solid-state lasers

    Kana Fujioka, Taku Saiki, Shinji Motokoshi, Yasushi Fujimoto, Hisanori Fujita, Masahiro Nakatsuka

    Journal of Luminescence   143   10 - 13   2013

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    We investigated the optimized sensitizing effect of Ce/Cr/Nd:YAG material for solar-pumped solid-state lasers using the sol-gel synthetic YAG powder method. After a parameter mapping survey on Ce3+ and Cr3+ additives in Nd:YAG for the sensitizing effect on sunlight, we found that the most efficient composition of Ce/Cr/Nd:YAG is where Ce3+ and Cr 3+ were 0.9 and 8.0 mol% respectively, when the Nd3+ concentration was 1.0 mol% and the sensitizing effect of the optimized Ce/Cr/Nd:YAG was increased four times more than the Cr/Nd:YAG one. This result indicates that Ce3+ can work as an effective sensitizer to Nd 3+ and optimized Ce/Cr/Nd:YAG ceramics can be useful to construct a space solar power system using a laser in space. © 2013 Elsevier B.V.

    DOI： 10.1016/j.jlumin.2013.04.040

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  • Air Cells Using Negative Metal Electrodes Fabricated by Sintering Pastes with Base Metal Nanoparticles for Efficient Utilization of Solar Energy Reviewed

    Taku Saiki, Takehiro Okada, Kazuhiro Nakamura, Tatsuya Karita, Yusuke Nishikawa, Yukio Iida

    International Journal of Energy Science   Vol. 2 Iss. 6, Dec. pp.228-234. ( 6 )   228 - 234   2012.12

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  • Study on Hgih Voltage Generation Using Flame Column and DC Power Supply Reviewed

    T. Saiki

    Elsevier J. of Electrostatics   70 No. 4 Aug. pp.400-406 (2012).   2012.6

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  • Efficient Amplification of Nd3+/Cr3+:YAG Ceramic Lasers Based on Cross-Relaxation under Solar-Pumping Reviewed

    T. Saiki, K. Fujioka, M. Nakatsuka, Y. Iida

    2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)   2012

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

    Efficient lasers as energy transfer devices from broadband solar light to coherent laser light have been developed recently. Research on efficient amplification of Nd3+/Cr3+:YAG ceramics based on cross-relaxation pumped by white light was performed.

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  • Analysis on Amplification Properties of Ce/Cr/Nd:YAG Ceramic Lasers by Computational Calculation Reviewed

    HAYASHI Takanori, SAIKI Taku, FUJIOKA Kana, IIDA Yukio, NAKATSUKA Masahiro

    rle   Vol.39 No.11 Nov. (2011) pp.854-861. ( 11 )   854 - 861   2011.11

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    Language：Japanese   Publisher：The Laser Society of Japan  

    Calculations on the optical properties or Ce/Cr/Nd:YAG ceramic lasers were performed. Rate equations

    DOI： 10.2184/lsj.39.854

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    Other Link： https://jlc.jst.go.jp/DN/JALC/00383390903?from=CiNii

  • 太陽光励起高出力固体レーザーの進展と高温化学への応用

    佐伯拓, 谷口誠治(レーザー総研), 中塚正大(レーザー総研)

    光学設計グループ機関誌 環境と光学   No.47 pp.3-9   2011.6

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  • Cross-Relaxation and Spectral Broadening of Gain for Nd/Cr:YAG Ceramic Lasers with White-Light Pump Source under High-Temperature Operation Reviewed

    T. Saiki, M. Nakatsuka, K. Fujioka, S. Motokoshi, K. Imasaki

    Elsevier Science, Optics. Commun.   Vol. 284 Feb., pp.2980-2984. (2011)   2011.2

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  • Zig-zag active-mirror laser with cryogenic Yb3+:YAG/YAG composite ceramics Reviewed

    H. Furuse, J. Kawanaka, N. Miyanaga, T. Saiki, K. Imasaki, M. Fujita, K. Takeshita, S. Ishii, Y. Izawa

    Optics Express   Vol. 19, No. 3 Jan., pp.2448-2455.(2011) ( 3 )   2448 - 2455   2011.1

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

    We report on a novel amplifier configuration concept for a 10 kW laser system using a zig-zag optical path based on a cryogenic Yb:YAG Total-Reflection Active-Mirror (TRAM) laser. The laser material is a compact composite ceramic, in which three Yb: YAG TRAMs are combined in series to increase the output power. Output powers of up to 214 W with a slope efficiency of 63% have been demonstrated for CW operation, even at a quite low pump intensity of less than 170 W/cm(2). Further scaling could achieve output powers of more than 10 kW. (C) 2011 Optical Society of America

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  • Highly Efficient Lasing Action of Nd3+- and Cr3+-Doped Yttrium Aluminum Garnet Ceramics Based on Phonon-Assisted Cross-Relaxation Using Solar Light Source Reviewed

    T. Saiki, M. Nakatsuka, K. Imasaki

    Jpn. J. Appl. Phys   Vol. 49, No.8 Aug., pp.082702-1-8. (2010) ( 8 )   2010.8

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

    We constructed a theory to explain the mechanism of laser generation with a high optical-optical conversion efficiency for Nd3+- and Cr3+-doped yttrium aluminum ceramics when sunlight or lamplight sources are used for pumping As a result, a unique mechanism of laser action was found where the solar or lamp-light power could be converted to laser power with a high efficiency close to 80%, which has not previously been observed The high conversion efficiency was not only considered to be based on one-to-one photon conversion but on two-photon excitation by a single photon with phonon assistance Thus, the mechanism of lasing action should include a process where thermal energy is converted to photon energy The theoretical results we obtained were consistent with those of the experiments (C) 2010 The Japan Society of Applied Physics

    DOI： 10.1143/JJAP.49.082702

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  • Development of Solar-pumped Nd/Cr:YAG Ceramics Lasers

    SAIKI Taku, NAKATSUKA Masahiro

    Ceramics Japan   Vol. 45 No.7 July pp.523-527. ( 7 )   523 - 527   2010.7

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  • Luminescence properties of highly Cr co-doped Nd:YAG powder produced by sol-gel method

    Kana Fujioka, Taku Saiki, Shinji Motokoshi, Yasushi Fujimoto, Hisanori Fujita, Masahiro Nakatsuka

    JOURNAL OF LUMINESCENCE   130 ( 3 )   455 - 459   2010.3

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

    We examined luminescence properties of highly chromium co-doped Nd:YAG powders fabricated by the sol-gel method. Though the maximum luminescence intensity of Cr:YAG was at 3.0 mol% of Cr3+ concentration, we found that the enhancement effect on Nd:YAG by co-doping Cr3+ was continued until 6.0 mol% of Cr3+ concentration. This phenomenon is well-explained by a simple energy transfer model derived from the rate equations between Cr3+ and Nd3+. The enhancement of sensitization for Nd3+ activator by high co-doped Cr3+ is very effective for making a miniaturized or thin film-type solar laser. (C) 2009 Elsevier B.V. All rights reserved.

    DOI： 10.1016/j.jlumin.2009.10.012

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  • 太陽光励起用Ce/Cr/Nd:YAGの蛍光特性評価 Reviewed

    藤岡加奈, 中塚正大, 佐伯 拓, 本越伸二, 今崎一夫, 藤本 靖, 藤田尚徳

    レーザー研究   Vol. 38 No.3 Mar. (2010) 207.   2010.3

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  • Total-reflection active-mirror laser with cryogenic Yb:YAG ceramics

    Hiroaki Furuse, Junji Kawanaka, Kenji Takeshita, Noriaki Miyanaga, Taku Saiki, Kazuo Imasaki, Masayuki Fujita, Shinya Ishii

    OPTICS LETTERS   34 ( 21 )   3439 - 3441   2009.11

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

    An efficient high-power laser operation has been demonstrated by using a cryogenic Yb:YAG composite ceramic with a total-reflection active-mirror arrangement. The composite ceramic, which had no high-reflection coating and was cooled with liquid nitrogen directly, showed four-level operation even at 67 kW/cm(3) of high pump density. A 273 W cw output power was obtained with 65% optical efficiency and 72% slope efficiency. (C) 2009 Optical Society of America

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  • Pre-evaluation method for the spectroscopic properties of YAG bulk materials by sol-gel synthetic YAG powder

    Kana Fujioka, Taku Saiki, Shinji Motokoshi, Yasushi Fujimoto, Hisanori Fujita, Masahiro Nakatsuka

    CERAMICS INTERNATIONAL   35 ( 6 )   2393 - 2399   2009.8

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：ELSEVIER SCI LTD  

    We propose a convenient method for pre-evaluating the spectroscopic properties of luminescent impurity doped YAG by sol-gel synthetic powder. Three synthetic methods, the sol-gel, normal-strike, and reverse-strike methods, are examined for their ability as a predictor and the sol-gel method proved the most effective of the three in experiments on crystallinity, particle size, and spectroscopic properties. The sol-gel Nd:YAG powder agrees well with that of a single crystal or ceramic YAG regarding the luminescent spectrum, the intensity, and the lifetime, even though the powder sintered at a low temperature of 1100 degrees C in comparison with the YAG crystal melting point of 1970 degrees C. These facts suggest that the sol-gel synthetic powder is the most effective and the easiest technique for evaluating spectroscopic properties of bulk YAG materials before fabricating the final materials. (C) 2009 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

    DOI： 10.1016/j.ceramint.2009.02.010

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  • High repetition rate laser pulses amplified by Nd/Cr:YAG ceramic amplifier under CW arc-lamp-light pumping

    T. Saiki, S. Motokoshi, K. Imasaki, K. Fujioka, H. Yoshida, H. Fujita, M. Nakatsuka, C. Yamanaka

    OPTICS COMMUNICATIONS   282 ( 13 )   2556 - 2559   2009.7

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

    Laser pulses with high repetitive rate generated from a Q-switch microchip Nd:YAG oscillator were amplified by Active mirror composed of Nd/Cr:YAG ceramic pumped by CW arc-lamp. The laser pulses were amplified, and saturation of averaged output laser power was observed. Repetitive ratio of injected laser pulses was changed from 20 to 100 kHz. Averaged output laser power and gain were measured, and gain coefficient and power-extraction efficiency were evaluated. Output laser power was calculated and compared to experimentally measured one, and the calculated results are consistent with the experimental ones. For amplification of laser pulses with high repetitive ratio, this laser material can realize very high laser gain with low pumping power density and high optical-optical conversion efficiency under CW-lamp-light pumping. (C) 2009 Elsevier B.V. All rights reserved.

    DOI： 10.1016/j.optcom.2009.03.022

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  • 200W-Class Nd/Cr:YAG Ceramic Laser under CW Quasi-Solar Pumping Reviewed

    SAIKI Taku, MOTOKOSHI Shinji, IMASAKI Kazuo, FUJIOKA Kana, FUJITA Hisanori, NAKATSUKA Masahiro, YAMANAKA Chiyoe

    rle   Vol. 37 No.5 ( 5 )   374 - 378   2009.5

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    Language：Japanese   Publisher：The Laser Society of Japan  

    Space solar power stations require energetic and efficient lasers as energy transfer devices kn-abstract=

    DOI： 10.2184/lsj.37.374

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    Other Link： https://jlc.jst.go.jp/DN/JALC/00331902004?from=CiNii

  • Laser pulses amplified by Nd/Cr:YAG ceramic amplifier using lamp and solar light sources

    T. Saiki, S. Motokoshi, K. Imasaki, K. Fujioka, H. Yoshida, H. Fujita, M. Nakatsuka, C. Yamanaka

    OPTICS COMMUNICATIONS   282 ( 7 )   1358 - 1362   2009.4

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    Laser pulses generated in a laser oscillator were amplified by Nd/Cr:YAG ceramic amplifiers. The saturation of output-laser energy was experimentally observed. We found that the stimulated emission cross-section of Nd/Cr:YAG ceramics was effectively increased and the saturation fluence was effectively reduced to 0.1 J/cm(2) due to the energy transfer between excited Cr and Nd ions. The output-laser energy we calculated was compared with the experimental ones and the extractable stored energy in the Nd/Cr:YAG ceramics was evaluated. This laser material is suitable for high-repetition-rate operations because of the high laser gain with low pumping intensity and low effective saturation fluence. (C) 2008 Elsevier B.V. All rights reserved.

    DOI： 10.1016/j.optcom.2008.12.050

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  • Two-pass amplification of CW laser by Nd/Cr:YAG ceramic Active mirror under lamp light pumping

    T. Saiki, S. Motokoshi, K. Imasaki, M. Nakatsuka, C. Yamanaka, K. Fujioka, H. Fujita

    OPTICS COMMUNICATIONS   282 ( 5 )   936 - 939   2009.3

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    The concept of an Active mirror with transparent Nd/Cr:YAG ceramics is proposed. A new ceramic material pumped by an arc-metal-halide lamp has been experimentally implemented. CW-laser light generated in a 1064 nm Nd:YAG micro-tip oscillator was amplified by an Active mirror made of Nd/Cr:YAG ceramic and pumped by CW arc-lamp light. The saturation power density of the Nd/Cr:YAG ceramic was lower than that of Nd:YAG because the stimulated-cross-section and lifetime were effectively enhanced by the sensitization of Cr ions. The maximum output laser power while keeping spatial beam quality was up to 3 W with an input lamp power of 9 W; the resulting optical-optical conversion efficiency of 33% was close to the theoretical prediction of nearly 50%. (C) 2008 Elsevier B.V. All rights reserved.

    DOI： 10.1016/j.optcom.2008.11.007

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  • 太陽光直接励起レーザーの現状と将来 Reviewed

    佐伯 拓

    レーザー研究   Vol. 37 No. 2 Feb. (2009) pp.120-126.   2009.2

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  • Temperature characteristics of small signal gain for Nd/Cr:YAG ceramic lasers

    T. Saiki, K. Funahashi, S. Motokoshi, K. Imasaki, K. Fujioka, H. Fujita, M. Nakatsuka, C. Yamanaka

    OPTICS COMMUNICATIONS   282 ( 4 )   614 - 616   2009.2

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    Thermal dependence on the small signal gain of Nd/Cr:YAG (yttrium aluminum garnet) ceramics was observed experimentally. Usually, Nd:YAG crystal and ceramics have remarkable gain reduction when optical pumping is performed and the temperature of the laser media is upped to 373 K. A CW laser light generated in a 1064 nm Nd:YAG laser oscillator was amplified by Nd/Cr:YAG ceramic amplifier, and the output power was measured at non-saturation level. Laser small signal gain of the ceramic disk was kept to 470 K This property was remarkably different from one of Nd:YAG crystals or ceramics. The peak shift of the fluorescence was observed experimentally when the temperature is high. (c) 2008 Elsevier B.V. All rights reserved.

    DOI： 10.1016/j.optcom.2008.10.032

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  • Nd3+- and Cr3+-Doped Yttrium Aluminum Garnet Ceramic Pulse Laser Using Cr4+-Doped Yttrium Aluminum Garnet Crystal Passive Q-Switch Reviewed

    T. Saiki

    Jpn. J. Appl. Phys.   Vol. 48 No.1 Jan. (2009) pp.122501-1-7   2009.1

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  • Effective Fluorescence Lifetime and Stimulated Emission Cross-Section of Nd/Cr:YAG Ceramics under CW Lamplight Pumping

    Taku Saiki, Shinji Motokoshi, Kazuo Imasaki, Kana Fujioka, Hisanori Fujita, Masahiro Nakatsuka, Yasukazu Izawa, Chiyoe Yamanaka

    JAPANESE JOURNAL OF APPLIED PHYSICS   47 ( 10 )   7896 - 7902   2008.10

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：JAPAN SOCIETY APPLIED PHYSICS  

    Remarkable improvements in the lifetime of the Nd upper level and in the effective stimulated emission cross-section of Nd/Cr:YAG ceramics have been theoretically and experimentally Studied. Until recently, it had been thought that the long energy transition time from Cr ions to Nd ions of Nd/Cr:YAG adversely affects laser action. degrading optical-optical conversion efficiency under CW and flash lamp pumping. However, current research showed that high-efficiency energy transition has a positive effect on laser action. The effective lifetime is increased from 0.23 to 1.1 ms and the emission cross-section is effectively increased to three times for that of the conventional Nd:YAG. A small signal gain is significantly improved, and the saturation power density is reduced to 1/10 that of the Nd:YAG for the same pumping power density. A CW laser light generated in it laser diode (LD)-pumped 1064 nm Nd:YAG laser oscillator was amplified, and the measured Output power was saturated. The output laser power calculated using theoretical Saturation power density was consistent with the experimental results. [DOI: 10.1143/JJAP.47.7896]

    DOI： 10.1143/JJAP.47.7896

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  • 円環状に配列したビームからのベッセルビームの発生 Reviewed

    佐伯 拓, 橋本和久

    レーザー研究   Vol. 36 No.10 Oct. (2008) pp.643-647.   2008.10

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  • ゾルゲル製作粉体によるドープYAGセラミックスの蛍光特性評価 Reviewed

    藤岡加奈, 佐伯 拓, 本越伸二, 藤本 靖, 中塚正大

    レーザー研究   Vol. 35 No. 6 June (2007) pp.393-397.   2007.6

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  • Nd/Cr : YAG ceramic rod laser pumped using arc-metal-halide-lamp

    Taku Saiki, Shinji Motokoshi, Kazuo Imasaki, Hisanori Fujita, Masahiro Nakatsuka, Chiyoe Yamanaka

    JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS   46 ( 1 )   156 - 160   2007.1

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

    We observed laser oscillations of rod-type Nd/Cr:YAG ceramics experimentally pumped using an arc-metal-halide lamp having a similar spectrum to solar light. An optical-optical conversion efficiency of 43% was obtained by chromium-ion codoping of Nd:YAG with an efficiency of 26%.

    DOI： 10.1143/JJAP.46.156

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  • Oscillation Property of Rod-Type Nd/Cr:YAG Ceramic Lasers with Quasi-Solar Pumping Reviewed

    Taku Saiki, Shinji Motokoshi, Kazuo Imasaki, Hisanori Fujita, Masahiro Nakatsuka, Yasukazu Izawa, Chiyoe Yamanaka

    2007 CONFERENCE ON LASERS & ELECTRO-OPTICS/QUANTUM ELECTRONICS AND LASER SCIENCE CONFERENCE (CLEO/QELS 2007), VOLS 1-5   1299 - +   2007

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

    We observed laser oscillations of rod-type Nd/Cr:YAG ceramics experimentally pumped using an arc-metal-halide lamp having a similar spectrum to solar light. An high optical-optical conversion efficiency of 43% was obtained by Cr ions co-doping. (C)2007 Optical Society of America

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  • Disk-type Nd/Cr : YAG ceramic lasers pumped by arc-metal-halide-lamp

    Taku Saiki, Kazuo Imasaki, Shinji Motokoshi, Chiyoe Yamanaka, Hisanori Fujita, Masahiro Nakatsuka, Yasukazu Izawa

    OPTICS COMMUNICATIONS   268 ( 1 )   155 - 159   2006.12

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

    We observed the lasing of highly sensitized Nd/Cr:YAG ceramic disks that use artificial solar radiation pumping. The disk material can be used for high power multi-stage amplifiers pumped by lamplight or sunlight because of its scalability and ability to handle high power densities. A maximum output power of 86 mW was experimentally obtained, and this value correlated well with the calculated results. A small signal gain of 1.9 was obtained, and the estimated stored energy was 0.6 J/cm(3), which is three or four times higher than that from a Nd:YAG medium. (c) 2006 Elsevier B.V. All rights reserved.

    DOI： 10.1016/j.optcom.2006.07.002

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  • 疑似太陽光励起クラッド・ロッド型固体レーザーの発振特性 Reviewed

    佐伯 拓

    レーザー研究   Vol. 34 No.5 May (2006) pp.374-378.   2006.5

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  • 高効率太陽光励起レーザーの特性 Reviewed

    今崎一夫, 佐伯 拓

    日本太陽エネルギー学会   Vol. 32 No.5 May (2006) pp.33-38.   2006.5

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  • Demonstrated fossil-fuel-free energy cycle using magnesium and laser

    T. Yabe, S. Uchida, K. Ikuta, K. Yoshida, C. Baasandash, M. S. Mohamed, Y. Sakurai, Y. Ogata, M. Tuji, Y. Mori, Y. Satoh, T. Ohkubo, M. Murahara, A. Ikesue, M. Nakatsuka, T. Saiki, S. Motokoshi, C. Yamanaka

    Applied Physics Letters   89 ( 26 )   2006

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

    The authors propose an energy cycle based on a renewable fuel. Magnesium is chosen as an energy carrier and is combusted with water to retrieve energy using many power devices. MgO, the combustion residue, is reduced back to Mg by laser radiation generated from solar and other renewable energy sources. They have achieved an energy recovery efficiency of 42.5% for converting MgO to magnesium, using a laser. Combined with a demonstrated 38% efficiency for converting an artificial sunlight source (metal halide lamp) into laser output energy indicates that the proposed energy cycle is already in a feasible range for practical use. © 2006 American Institute of Physics.

    DOI： 10.1063/1.2423320

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  • Oscillation property of disk-type Nd/Cr : YAG ceramic lasers with quasi-solar pumping Reviewed

    Taku Saiki, Kazuo Imasaki, Shinji Motokoshi, Chiyoe Yamanaka, Shigeaki Uchida, Hisanori Fujita, Masahiro Nakatsuka, Yasukazu Izawa

    BEAMED ENERGY PROPULSION   830   383 - +   2006

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    Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：AMER INST PHYSICS  

    Lasing of highly sensitized Nd/Cr:YAG ceramic disk with imitated solar radiation pumping has been observed. The material is promising for space solar powerstation because of OF its scalability on high power density handling capability.

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  • Design of a dimple mirror system for uniform illumination from an MIR-FEL

    M Heya, T Saiki, K Tsubakimoto, K Awazu, M Nakatsuka

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   528 ( 1-2 )   249 - 253   2004.8

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

    In order to generate a flat-topped beam profile from a tunable, broadband, mid-infrared free-electron laser (MIR-FEL), we have proposed and designed a dimple mirror system (DMS), using a laser optics calculation code LOCCO. The principles of the DMS are similar to those of a micro-lens array system involving a principal focusing lens and a two-dimensional (2D) array of micro-lenses located ahead of the principal lens. The DMS is composed of a parabolic mirror, which acts as the principle lens and a 2D array of micro-dimples, which splits the incident FEL beam into many partial beams. All beamlets overlap near the focal point of the parabolic mirror, resulting in the generation of an approximately flat-topped intensity profile due to the interference of light. We proved that the DMS can generate a flat-topped profile even over a wide MIR waveband. Thus, we showed the applicability of the DMS for uniform illumination from a tunable, broadband MIR-FEL. (C) 2004 Elsevier B.V. All rights reserved.

    DOI： 10.1016/j.nima.2004.04.057

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  • A Nd doped Multimode-Fiber-Laser with D-Shape Large Clad under Quasi-Solar-Pumping Reviewed

    SAIKI Taku, IMASAKI Kazuo, MOTOKOSHI Shinji, UCHIDA Shigeaki, FUJITA Hisanori, NAKATSUKA Masahiro, IZAWA Yasukazu, YOSHIDA Minoru, ITO Hideaki, YAMANAKA Chiyoe

    The Review of laser engineering   Vol. 32 No. 1 Jan. (2004) pp.48-53. ( 1 )   48 - 53   2004.1

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    Language：Japanese  

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  • Solar-pumped Nd dope multimode-fiber laser with a D-shaped large clad

    T Saiki, S Uchida, K Imasaki, S Motokoshi, M Nakatsuka

    BEAMED ENERGY PROPULSION   702   378 - 389   2004

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    Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：AMER INST PHYSICS  

    A study to maximize the total conversion efficiency and reduce the payload for Nd/Cr doped fiber laser had been performed. Laser oscillation has been observed in a multimode Nd-doped fiber laser with "D-shaped" clad under quasi-solar pumping simulated by an intense metal-halide arc lamp of which color temperature was 5600 kelvin. The fiber is 78-m long. The Nd doping rate was 3000 ppm in silica core-glass. The output power obtained was 300 mW when the injected power of lamplight was 1.1 W at the entrance of the fiber and the optical-optical conversion efficiency was over 25%. The threshold of the input power for laser oscillation is 24 times of the solar constant in space. This value is one order lower than the case of crystal lasers which had been reported under solar-pumping.

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  • Calculation of Excitation and Oscillation for a Solid-State Laser under Coaxial Pumping with Solar Light by Using a Collector Structure with Asymmetrical Profile Reviewed

    SAIKI Taku, IMASAKI Kazuo, MOTOKOSHI Shinji, TSUBAKIMOTO Kouji, UCHIDA Shigeaki, FUJITA Hisanori, NAKATSUKA Masahiro, IZAWA Yasukazu, NAGAYAMA Hiroyuki, MORI Masahiro, YAMANAKA Chiyoe

    The Review of laser engineering   Vol. 30 No.3 Mar. (2002)pp.133-139. ( 3 )   133 - 139   2002.3

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  • Calculation on 3-Dimensional Propagation of Amplified Spontaneous Emission in a Cassegrain Type 3-Pass Amplifier. Reviewed

    SAIKI Taku, KANABE Tadashi, FUJITA Hisanori, NAKATSUKA Masahiro, NAKAI Sadao

    rle   Vol. 28 No. 4 Apr. (2000) pp.236-242. ( 4 )   236 - 242   2000.4

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    Language：Japanese   Publisher：The Laser Society of Japan  

    The multi-pass laser amplifier has been often used as the final power amplification stage in the high peakpower laser systems. The Amplified Spontaneous Emission (ASE) at such a strongly pumped laser generally results in a parasitic oscillation that limits a high gain operation of the amplifier. The three dimensional propagation of the finite-band-width ASE from laser glasses has been calculated for a 30-m long Cassegranian 3-pass disk amplifiers of 35-cm clear aperture. The computational code includes the temporal behavier of flashlamp pumping, the gain reduction in a laser disk due to ASE generation, the long-path back-and-force propagation of ASE between Cassegranian mirrors, and the reduction effect on ASE of spatial filter installed after the amplifier. The ASE energy and its profile have been compared for the on-axis and off-axis arrangement of Cassegranian optics, and also z-pass geometries for three pass configuration. The off-axis alignment of the mirror pairs is very preferable to reduce ASE to one hundredth level than that appeared in the on-axis geometry.

    DOI： 10.2184/lsj.28.236

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  • Optimization of Cassegrain type 3-pass amplifier with ASE

    T Saiki, T Bontoux, T Kanabe, H Fujita, M Nakatsuka, S Nakai

    FUSION ENGINEERING AND DESIGN   44   393 - 399   1999.2

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

    We calculated ASE propagation in a Cassegrain-type amplifier. The code used in the calculations is applicable to a multipass amplification system. Output fluence of the ASE at the exit of the system can be decreased by optimization of design parameters. Ratio of diameter of main mirror hole to sub mirror diameter is the most sensitive parameter, and should be larger than 1.2. It is suitable to set gain medium (laser glasses) as near to the main mirror as possible. We found optimal values for a new amplifier chain in GXII laser facility which can deliver ultrashort and high power pulses for the basic research on fast ignition (Fujita et al., CLEO '97, CFK 3, Baltimore MD, 1997; [1]). (C) 1999 Elsevier Science S.A. All rights reserved.

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  • Study of serrated aperture for a Cassegrain booster amplifier

    Thierry Bontoux, Taku Saiki, Tadashi Kanabe, Hisanori Fujita, Masahiro Nakatsuka

    Optical Review   5 ( 4 )   234 - 241   1998

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Optical Society of Japan  

    The upgrade of the actual large laser facilities (GEKKO XII in our case) implies an increase of filling-factor, but avoiding the generation of spatial high frequencies. To reach that purpose we intend to construct the beams using serrated apertures with an optimised shape. The performances of our system led after simulation to a 70% filling factor with less than 2% fluctuation on the laser pattern intensity map. The optimisation was also checked from a financial point of view. The usual serrated apertures are already giving good results, so we attached ourselves to seek for financial efficiency.

    DOI： 10.1007/s10043-998-0234-2

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Books

  • 金属ナノ粒子の合成／構造制御とペースト化および最新応用展開

    米澤徹, 佐伯拓（ Role： Contributor）

    Ｒ＆Ｄ支援センター  2020.12 

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  • 液中レーザーアブレーションによるナノ粒子作製と応用

    谷口誠治, 佐伯拓

    公益財団法人レーザー技術総合研究所 年報  2018.7 

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  • 液中レーザーアブレーションによるナノ粒子作製：レーザー還元金属ナノ粒子の生成メカニズム

    谷口誠治, 石井隆太, 佐伯拓

    公益財団法人レーザー技術総合研究所 年報  2017.7 

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  • 液中レーザーアブレーションによるナノ粒子作製：酸化亜鉛の還元・ナノ粒子化と空気電池への応用

    谷口誠治, 木村優作, 佐伯拓

    公益財団法人レーザー技術総合研究所 年報  2016.7 

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  • 太陽光励起レーザーの開発と高温化学への応用

    佐伯拓（ Role： Sole author）

    日本工業出版 光アライアンス  2013.8 

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  • 液相レーザーアブレーション法による酸化チタンナノ粒子生産技術の研究

    谷口誠治(レーザー総研), 古河裕之(レーザー総研), 佐伯拓（ Role： Joint author）

    財団法人レーザー技術総合研究所 年報  2011.6 

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  • 太陽光励起レーザーの高効率動作とその応用

    佐伯拓（ Role： Sole author）

    関西大学理工学会誌 理工学と技術  2010.11 

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  • Solar-Powered Lasers

    D. Graham-Rowe（ Role： Contributor）

    Nature Photonics  2010.2 

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  • 太陽光直接励起固体レーザー

    佐伯 拓（ Role： Joint author）

    光アライアンス,日本工業出版  2004 

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MISC

  • 電気抵抗、実質ゼロに

    佐伯 拓

    日刊工業新聞   科学技術・大学 25面   2018.8

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    MHｚ帯の高周波で強磁性を持つ金属ナノ多結晶体の電気抵抗が常温で０となることを初めて発見した。この現象は、通常のバルク金属では見られない。この応用先として、この技術の応用先として、高周波回路やエネルギー伝送線路の低損失化や半導体デバイスのさらなる消費電力化が今後期待される。

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  • 焼成アルミ粒子に磁性

    佐伯 拓, 稲田 貢

    日刊工業新聞   23面   2016.3

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  • 空気電池

    佐伯拓

    日本特許   特願2013-154287   2013.7

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  • 太陽光を使いつくせ

    佐伯拓

    日本経済新聞   朝刊 19面   2012.9

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  • 京大など、太陽電池変換効率を４０％に改善

    佐伯拓

    日本経済新聞   朝刊 14面   2012.7

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    太陽光を効率良く金属に蓄積し利用する技術を開発太陽光をレーザー光へ高効率で変換。酸化金属微粒子をレーザー光で液相で還元。還元金属は燃料電池用水素の製造や空気電池に利用される。金属はリサイクルされるので何度でも利用可能。

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Presentations

  • コンピュータ画像でのEHDと静電気による推進デバイスの浮上特性解析

    佐伯拓

    応用物理学会  2024.3 

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    Venue：東京都 東京都市大学 世田谷キャンパス  

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  • 浮上力改善のための多層電極を用いたEHDと静電気による推進システム

    佐伯拓

    応用物理学会  2023.9 

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    Venue：熊本県、熊本城ホール他  

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  • 液中レーザーアブレーションでのZn-Cu合金ナノ粒子と合金作製

    佐伯拓, 稲田貢

    応用物理学会  2023.9 

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    Venue：熊本県、熊本城ホール他  

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  • 回転永久磁石を用いた大型磁気車輪の浮上力特性

    佐伯拓, 桑原佑貴, 稲田貢

    応用物理学会  2023.9 

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    Venue：熊本県、熊本城ホール他  

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  • 永久磁石を用いた磁気車輪におけるハルバッハ配列の応用

    佐伯拓, 稲田貢

    電気学会A部門  2023.9 

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    Venue：愛知県、愛知工業大学 自由ヶ丘キャンパス  

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  • Laser Energy Transmission Using 910nm Near-infrared LD and PID control

    S .Li, Y. Uehara, Taku Saiki

    OPIC LSSE2023  2023.4 

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    Venue：Pacifico Yokohama, Yokohama, Japan.  

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  • Development of Axial-flux Motor using Sintered Iron Nano-polycrystalline Body and Its Application to Magnetic Levitation and Propulsion System

    Y. Uehara, S. Ri, D. Nishimori, T. Saiki, M. Inada

    OPIC LSSE2023  2023.4 

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    Venue：Yokohama, Yokohama, Japan.  

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  • ハルバッハ配列回転永久磁石を用いた磁気車輪の浮上力特性

    佐伯拓, 稲田貢

    応用物理学会  2022.9 

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    Venue：宮城県、東北大学 川内北キャンパス＋オンライン  

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  • 磁気車輪回転速度 PID 制御での機械学習ゲインパラメータ自動生成

    リ サイショウ, 上原 裕貴, 稲田 貢, 佐伯 拓

    応用物理学会  2022.9 

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    Venue：宮城県、東北大学 川内北キャンパス＋オンライン  

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  • 磁気浮上推進システムにおける磁気車輪の回転速度 PID 制御

    上原 裕貴, リ サイショウ, 稲田 貢, 佐伯 拓

    応用物理学会  2022.9 

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    Venue：宮城県、東北大学 川内北キャンパス＋オンライン  

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  • 回転永久磁石を用いた磁気浮上推進システムの推進力特性

    佐伯拓, 森慶一, 稲田 貢

    応用物理学会  2022.9 

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    Venue：宮城県、東北大学 川内北キャンパス＋オンライン  

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  • Magnetic Levitation Propulsion System Using Rotating Permanent Magnets

    Kazumasa Ino, Kouki Nagatani, Mitsuru Inada, Taku Saiki

    OPIC  2022.4 

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    Venue：Pacifico Yokohama, Yokohama, Japan, Online  

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  • 回転永久磁石を用いた磁気浮上推進システムでの金属板厚みの最適化

    佐伯拓, 稲生一優, 稲田 貢

    応用物理学会  2022.3 

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    Venue：神奈川県 青山学院大学相模原キャンパス ハイブリッド（オンライン＋現地開催）  

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  • 還元鉄ナノ多焼成体を用いた薄型アキシャルギャップ発電機の開発

    佐伯拓, 松崎友樹, 安木達也, 中屋大翔, 稲田貢

    応用物理学会  2021.9 

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    Venue：オンライン  

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  • 回転永久磁石を用いた磁気浮上推進システムの開発

    稲生一優, 米津大吾, 稲田 貢, 佐伯 拓

    応用物理学会  2021.9 

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    Venue：オンライン  

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  • 太陽光励起Cr/Nd:YAGセラミックパルスレーザーの増幅に関する研究

    河邉 直也, 立林 晃, 佐伯 拓

    応用物理学会  2021.9 

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    Venue：オンライン  

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  • Rod-Type Ce/Cr/Nd:YAG Ceramic Lasers Using White Light Pump Source

    SAIKI,Taku

    OPIC  2021.4 

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    Venue：Online  

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  • 【招待講演】太陽光励起レーザーも含め,レーザー還元金属ナノ粒子を用いた金属空気電池の開発

    佐伯拓

    第1回 電池・レーザー材料研究会  2020.12 

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  • Microchip Nd:YVO4 Lasers Pumped by Wavelength-Stabilized Single-Mode Laser Diode

    SAIKI,Taku, A. Tatebayashi, M. Ohmori

    OPIC  2020.4 

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    Venue：Yokohama, Japan  

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  • Development of Axial-Gap Generator Using Fe Nanoparticles and Sintered Fe Nano-polycrystalline

    SAIKI,Taku, T. Matsuzaki, T. Yasuki, M. Inada

    OPIC  2020.4 

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    Venue：Yokohama, Japan  

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  • Optical switching using free carrier effect of silicon with high purity

    M. Ohmori, Y. Iida, SAIKI,Taku

    OPIC  2020.4 

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    Venue：Yokohama, Japan  

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  • Magnetic properties of Al nanoparticle and Al nanoparticle/Ag nanoparticle composites prepared by pulsed laser ablation method

    M. Inada, R. Yonezawa, A. Matsuo, Taku Saiki

    2019.9 

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  • 還元鉄ナノ粒子と焼成体を用いたアキシャルギャップ発電機の開発

    佐伯拓, 松崎友樹, 安木達也, 稲田 貢

    応用物理学会  2019.9 

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    Venue：北海道, 北海道大学 札幌キャンパス  

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  • Characteristics on optical switching using carrier effect in high purity silicon

    Masaki Omori, Yukio Iida, Taku Saiki

    2019.9 

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  • 還元チタンナノペースト焼成板を用いた空気電池の特性

    佐伯拓, 中林 拓弥

    応用物理学会  2019.9 

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    Venue：北海道, 北海道大学 札幌キャンパス  

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  • Magnetic properties of Al nanoparticles and Al/Ag nanoparticle composites prepared by pulsed laser ablation

    M. Inada, R. Yonezawa, Taku Saiki, A. Matsuo, T. Saitoh

    15th Int. Conf. on Laser Ablation  2019.9 

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    Venue：Hawaii, USA  

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  • Si nano-polycrysalline body with ferromagnetic property and vanishing of electrical resistance at local high frequencies

    SAIKI,Taku, Mitsuru Inada, Yukio Iida

    SECTOR  2019.6 

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    Venue：Paris, France  

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  • Amplification Property of Ce/Cr/Nd:YAG Ceramic Active-Mirror Laser Using White-light Pump Source

    SAIKI,Taku, Y. Kon, T. Nakamachi, T. Hayashi, H. Furuse, S. Motokoshi, Y. Fujimoto, M. Nakatsuka

    OPIC  2019.4 

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    Venue：Yokohama, Japan  

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  • 【招待講演】太陽光励起レーザーとエネルギー応用

    佐伯拓, 谷口誠治, 稲田貢

    平成３０年電気関係学会関西連合大会  2018.12 

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    Venue：大阪工業大学  

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  • Generation of Sawtooth High Voltage Pulses Using External Capacitor

    SAIKI,Taku

    2018.9 

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  • 焼成鉄ナノ多結晶体における高周波抵抗の局所的消失

    佐伯拓, 宮楠大輝, 山崎和仁, 飯田幸雄, 稲田 貢

    応用物理学会  2018.9 

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    Venue：名古屋, 名古屋国際会議場  

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  • Amplification Property of Ce/Cr/Nd:YAG Ceramic LaserUsing White-light Pump Source

    SAIKI,Taku, T. Nakamachi, T. Hayashi, R. Matsushita, T. Iichiuji, H. Furuse, S. Motokoshi, Y. Fujimoto, M. Nakatsuka

    OPIC  2018.4 

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    Venue：Yokohama, Japan  

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  • Amplification Property of Ce/Cr/Nd:YAG Ceramic Laser Using White-light Pump Source

    SAIKI,Taku, T. Nakamachi, T. Hayashi, R. Matsushita, T. Iichiuji, H. Furuse, S. Motokoshi, Y. Fujimoto, M. Nakatsuka

    ALPS  2018.4 

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    Venue：Yokohama, Japan  

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  • Recyclable metal air cell using sintered Zn pastes with reduced Zn nanoparticles by pulse laser ablation in liquids

    Taku Saiki, R. Ishii, S. Taniguchi

    Laser Solutions for Space and the Earth (LSSE) 2018  2018.4 

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    Venue：Yokohama, Japan  

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  • 強磁性を持つ焼成ナノシリコン体における高周波抵抗の局所的消失

    佐伯拓, 飯田幸雄

    応用物理学会  2017.9 

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    Venue：福岡、福岡コンベンションセンター  

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  • 白色光励起 Ce/Cr/Nd:YAG セラミックレーザーの増幅特性

    佐伯拓, 中町崇人, 松下隆平, 一氏俊希, 古瀬裕章, 本越伸二, 藤本 靖, 中塚正大

    応用物理学会  2017.9 

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    Venue：福岡県、福岡国際コンベンションセンター  

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  • High Frequency Core Inductor Using Sintered Aluminum Nano-paste with Aluminum Nano-polycrystalline Structure

    S. Masuda, SAIKI,Taku, Y. Iida, M. Inada

    CLEO  2017.5 

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    Venue：San Jose, CA, USA  

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  • Recyclable Air Fuel Cells Using Sintered Nanopastes with reduced Mg nanoparticles prepared by Pulse Laser Ablation in Liquids for Solar Energy Cycle

    SAIKI,Taku, S. Uchida, S. Taniguchi, S. Masuda, M. Dejima, K. Nakamura, Y. Nishikawa, Y. Iida

    CLEO  2017.5 

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    Venue：San Jose, CA, USA  

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  • Frequency Characteristics of Core Inductors Using Sintered Metal Nano-paste with a Metal Nano-polycrystalline Structure

    S. Masuda, SAIKI,Taku, Y. Iida, M. Inada

    OPIC ALPS  2017.4 

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    Venue：Yokohama, JAPAN  

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  • Application of Sintered Si Nanopaste with Si Nano-polycrystalline to Magnetic Materials and Vanishing of Resistance at Local High Frequency

    SAIKI,Taku, Y. Iida

    OPIC ALPS  2017.4 

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    Venue：Yokohama, Japan  

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  • 液中レーザーアブレーション法による還元金属ナノ粒子の作製

    谷口誠二, 佐伯拓

    日本化学会 第97春季年会  2017.3 

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    Venue：慶應義塾大学 日吉キャンパス  

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  • 焼成アルミナノ多結晶板を用いたコア付きインダクターの試作

    佐伯拓, 飯田幸雄, 稲田貢, 増田真一郎

    応用物理学会  2016.9 

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    Venue：新潟県 朱鷺メッセ  

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  • レーザー焼成金属ナノペーストを用いた空気電池の特性

    増田真一郎, 石井隆太, 中岡亮, 佐伯拓

    応用物理学会  2016.9 

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    Venue：新潟県 朱鷺メッセ  

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  • QWスイッチ＆セルフモードロックNd/Cr：YAGセラミックパルスレーザーの開発

    金森真也, 廣田 夏, 佐伯 拓

    応用物理学会  2016.9 

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    Venue：新潟県 朱鷺メッセ  

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  • Recyclable metal air cell using sintered Si pastes with reduced Si nanoparticles by pulse laser ablation in liquids

    SAIKI,Taku, K. Nakamaura, S. Nakata, K. Nakamura, T. Uematsu, S. Masuda

    OPIC  2016.5 

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    Venue：Yokohama, Japan  

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  • Development of Self-Q-switched and Mode-locked Nd/Cr: YAG Ceramic Pulse Laser Using Cr4+: YAG Crystal

    S. Kanemori, N. Hirota, SAIKI,Taku

    OPIC  2016.5 

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    Venue：Yokohama, Japan  

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  • Fabrication of Core Inductor Using Sintered Aluminum Nano-paste with Aluminum Nano-polycrystalline structure

    SAIKI,Taku, Y. Iida, S. Masuda

    The 5th Advanced Lasers and Photon Sources (ALPS’16),  2016.5 

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  • 還元シリコンペースト焼成板を用いた空気電池の特性

    佐伯 拓, 中村啓人, 中田翔真, 中村和広, 植松 徹

    応用物理学会  2015.9 

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    Venue：名古屋国際会議場  

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  • 還元ナノシリコン焼成多結晶体の紫外光励起による可視光発光特性

    佐伯 拓, 飯田幸雄

    応用物理学会  2015.9 

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    Venue：名古屋国際会議場  

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  • フェムト秒パルスレーザーでの液相レーザーアブレーションによる酸化マグネシウムの還元

    佐伯 拓,, 谷口誠治, 出島 満, 内田成明, 浅川 誠, 中村和広, 西川侑介, 飯田幸雄

    応用物理学会  2015.9 

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    Venue：名古屋国際会議場  

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  • Dependence of Temperature on Fluorescence Lifetime of Nd Ion for Ce/Cr/Nd:YAG Ceramic

    Takashi Nakamachi, Taku Saiki, Takanori Hayashi, Kana Fujioka, Hiroaki Furuse, Yoshikatsu Honda, Shinji Motokoshi, Yasushi Fujimoto,, Masahiro Nakatsuka, Yukio Iida

    OPIC  2015.4 

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    Venue：Yokohama, Japan  

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  • Development on Thermoelectric Transducer Using Laser-Sintered Reduced Metal Nanopastes

    Yannan Li, Taku Saiki, Yukio Iida

    OPIC  2015.4 

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    Venue：Yokohama, Japan,  

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  • Enhancement of Output Laser Power in High-Power Nd/Cr:YAG Ceramic Amplifier Based on Cross-relaxation Effect under Solar Pumping

    T. Nakamachi, N. Matuoka, T. Saiki, K. Fujioka, M. Nakatsuka, Y. Iida

    OSA  2014.6 

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    Venue：Sunjose, Califorunia, USA  

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  • Laser sintering of nanopastes with reduced metal nanoparticles prepared by laser ablation in liquids

    T. Saiki, M. Yoshida, Y. Koga, K. Li, Y. Iida

    Proceeding of The 3rd Advanced Lasers and Photon Sources (ALPS)  2014.4 

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  • Recyclable Air Fuel Cells Using Sintered Mg Nanopastes for Solar Energy Cycle

    SAIKI,Taku, S. Uchida, T. Karita, K. Nakamura, Y. Nishikawa, S. Taniguchi, Y. Iida

    OPIC ALPS  2014.4 

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    Venue：Yokohama, Japan  

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  • Amplification of High Repetitive Pulse Laser Using Nd/Cr:YAG Ceramic Active Mirror Amplifier

    Y. Nishino, T. Saiki, T. Nakamachi, K. Fujioka, M. Nakatsuka, Y. Iida

    OPIC  2014.4 

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    Venue：Yokohama, Japan  

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  • レーザー還元金属ナノ粒子焼成金属板を用いた異種金属接合Li空気電池の特性評価

    佐伯 拓, 中村和広, 狩田達也, 西川侑介, 飯田幸雄

    応用物理学会  2014.3 

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    Venue：神奈川 相模原、青山学院大学  

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  • 還元マグネシウムペースト焼成板を用いたリサイクル可能な空気電池の特性評価

    狩田達也, 佐伯拓,, 内田成明, 中村和広, 西川侑介, 谷口誠治, 飯田幸雄

    応用物理学会  2014.3 

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    Venue：神奈川 相模原、青山学院大学  

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  • 液相レーザー還元金属ナノ粒子ペーストのCWレーザー焼成

    佐伯拓, 吉田真里奈, 古賀雄貴, 李ケンナン, 飯田幸雄

    応用物理学会  2014.3 

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    Venue：神奈川県相模原、青山学院大学 相模原キャンパス  

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  • Nd/Cr:YAGセラミックアクティブミラー増幅器を用いた高繰返しパルスレーザーの増幅特性

    西野義之, 佐伯拓, 中町崇人, 藤岡加奈, 飯田幸雄, 中塚正大

    応用物理学会  2014.3 

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    Venue：神奈川 相模原、青山学院大学  

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  • 液相レーザーアブレーション法を利用して作成した超凝集アルミニウムの磁化特性

    稲田貢, 佐伯拓, 松尾晶, 金道浩一, 飯田幸雄, 齊藤正

    応用物理学会  2014.3 

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    Venue：神奈川 相模原、青山学院大学  

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  • 還元マグネシウムペースト焼成板を用いたリサイクル可能な空気電池の特性評価

    佐伯拓, 内田成明, 狩田達也, 中村和広, 西川侑介, 谷口誠次, 飯田幸雄

    レーザー学会  2014.1 

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    Venue：福岡県北九州市 北九州国際会議場  

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  • 液相レーザーアブレーション法による酸化マグネシウムの還元

    出島満, 佐伯拓, 谷口誠治, 内田成明, 中村和広, 西川侑介, 飯田幸雄

    レーザー学会  2014.1 

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    Venue：福岡県北九州市 北九州国際会議場  

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  • 同時的にモード同期を受けるＱスイッチNd/Cr:YAGセラミックパルスレーザーの開発

    廣田夏, 佐伯拓, 藤原直人, 松岡尚紀, 飯田幸雄

    応用物理学会  2013.9 

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    Venue：同志社大学京田辺キャンパス  

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  • 金属ナノ粒子を用いた光導波路

    矢田宗嗣, 飯田幸雄, 佐伯拓

    応用物理学会  2013.9 

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    Venue：同志社大学 京田辺キャンパス  

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  • Optical Waveguide Using Metal Nanoparticles

    M. Yada, Y. Iida, T. Saiki

    OPIC  2013.4 

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    Venue：Yokohama, Japan  

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  • Enhancement of Output Laser Power in High-power Nd/Cr:YAG Ceramic Active Mirror Amplifiers Based on Cross-relaxation Effect under White Light Source Pumping

    N. Matsuoka, T. Saiki, N. Fujiwara, T. Hayashi, N. Hirota, K. Fujioka, M. Nakatsuka, Y. Iida

    Proc. the 2nd Advanvced Lasers and Photon Sources (ALPS)  2013.4 

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  • Air Fuel Cells Using Sintered Metal Pastes for Solar Energy Cycle

    T. Karita, T. Saiki, T. Okada, K. Nakamura, Y. Nishikawa, Y. Iida

    Proc. the 2nd Advanvced Lasers and Photon Sources (ALPS)  2013.4 

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  • Development of Q-switched and Mode-locked Nd/Cr:YAG Ceramic Laser

    N. Hirota, T. Saiki, N. Fujiwara, N. Matsuoka, T. Hayashi, Y. Iida

    Proc. the 2nd Advanvced Lasers and Photon Sources (ALPS)  2013.4 

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  • Characteristic of Ultra-High Voltage Generation using Flame Column and High Voltage Power Supply

    Taku Saiki

    The 73rd JSAP AutumnMeeting (2012),  2012.9 

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    Venue：Ehime Univ and Matsuyama Univ., Japan  

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  • 液相レーザーアブレーションによる還元鉄ナノ粒子合成と水素製造への応用

    岡田竹弘, 上田剛, 谷口誠治, 佐伯拓, 古隆志, 富永健太, 飯田幸雄

    応用物理学会  2012.9 

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    Venue：愛媛大学、松山大学  

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  • 太陽光励起Nd/Cr:YAG セラミックレーザーにおけるクロス緩和効果

    松岡尚紀, 藤原直人, 佐伯拓, 林孝則, 廣田夏, 藤岡加奈, 飯田幸雄, 中塚 正大

    応用物理学会  2012.9 

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    Venue：愛媛大学、松山大学  

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  • 太陽光を利用した再生可能エネルギーの生産を目的としたレーザー還元金属ナノ粒子焼成金属板を用いた空気電池の特性評価

    佐伯拓, 岡田竹弘, 中村和広, 狩田達也, 西川侑介, 飯田幸雄

    応用物理学会  2012.9 

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    Venue：愛媛大学、松山大学、  

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  • Efficient Amplification of Nd3+/Cr3+:YAG Ceramic Lasers Based on Cross-Relaxation under Solar-Pumping

    T. Saiki, K. Fujioka, M. Nakatsuka, Y. Iida

    Conference on the Lasers and Electro-Optics (CLEO): Science and Innovations,  2012.5 

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    Venue：San Jose Convention Center, CA, USA  

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  • Amplification Properties of Ce/Cr/Nd:YAG Ceramic Lasers by Computational Calculations

    T. Hayashi, T. Saiki, K. Fujioka, Y. Iida, M. Nakatsuka

    Conference on the 1st Advanced Lasers & Photon Source, Optics & Photonics International Council  2012.4 

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    Venue：Pacifico Yokohama, Yokohama, Japan  

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  • Synthesis of Fe and FeO Nanoparticles by Laser Ablation in Liquids and its Applications

    T. Okada, S. Taniguchi, T. Saiki, T. Furu, Y. Iida, M. Nakatsuka

    Optics & Photonics International Council  2012.4 

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    Venue：Pacifico Yokohama, Yokohama, Japan  

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  • Amplification Property of High-power Multi-stage Nd/Cr:YAG Ceramic Active Mirror Laser with Quasi-solar Light Pumping

    N. Fujiwara, T. Saiki, K. Fujioka, Y. Iida, M. Nakatsuka

    Optics & Photonics International Council  2012.4 

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    Venue：Pacifico Yokohama,Yokohama, Japan  

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  • kW級出力を目指した太陽光励起Nd/Cr:YAGセラミック多段アクティブミラー型レーザー増幅器の検討

    藤原直人, 佐伯拓, 林孝則, 藤岡加奈, 飯田幸雄, 中塚正大

    応用物理学会  2012.3 

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    Venue：日本、早稲田大学  

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  • 太陽光励起Ce/Cr/Nd:YAGセラミックレーザーにおける増幅特性の解析

    林孝則, 佐伯拓, 藤岡加奈, 飯田幸雄, 中塚正大

    応用物理学会  2012.3 

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    Venue：日本 早稲田大学  

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  • 擬似太陽光励起光源を用いた高出力Nd/Cr:YAGセラミック多段アクティブミラー型レーザーの増幅特性

    藤原直人, 佐伯拓, 林孝則, 藤岡加奈(阪大レーザー研), 飯田幸雄, 中塚正大(レーザー総研)

    レーザー学会  2012.1 

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    Venue：日本、仙台  

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  • 太陽光励起高出力固体レーザーの進展と高温化学への応

    佐伯拓, 谷口誠治(レーザー総研), 中塚正大(レーザー総研)

    応用物理学会 分科会 日本光学会 光設計研究グループ 第４７回研究会 「環境と光学」  2011.6 

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    Venue：京都大学 桂キャンパス Ｂクラスター事務管理棟  

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  • 高出力太陽光直接励起レーザーの開発

    佐伯拓, 中塚正大(レーザー総研)

    日本学術振興会 光電相互変換第１２５委員会 本委員会第２０８回研究会  2010.5 

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    Venue：東京理科大学 理窓会館  

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  • Thermal Effect of Cryogenic Yb:YAG Total-Reflection Active-Mirror Laser

    H. Furuse, J. Kawanaka, N. Miyanaga, T. Saiki, M. Fujita, K. Imasaki, K. Takeshita, S. Ishii, Y. Izawa

    Proceedings of SPIE - The International Society for Optical Engineering  2010.2 

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  • Zig-Zag Active-Mirror Laser with Cryogenic Yb:YAG

    H. Furuse, J. Kawanaka, N. Miyanaga, T. Saiki, M. Fujita, K. Imasaki, K. Takeshita, S. Ishii, Y. Izawa

    Advanced Solid-State Photonics(ASSP) 2010  2010.1 

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    Venue：San Diego, California, USA  

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  • High Efficient Cryogenically-Cooled Yb:YAG Active-Mirror Laser Using Total-Reflection Geometry

    H. Furuse, T. Saiki, M. Fujita, K. Imasaki, S. Ishii, K. Takeshita, N. Miyanaga, J. Kawanaka

    Conference on Lasers and Electro-Optics/Europe (CLEO/Europe)  2009.6 

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    Venue：Munich, Germany  

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  • Total-Reflection Active-Mirror Laser with Directly Liquid-Nitrogen-Cooled Yb:YAG Ceramics

    H. Furuse, SAIKI,Taku

    CLEO/QELS  2009.5 

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    Venue：Baltimore, MD, USA  

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  • Total reflection Active-Mirror Laser with Cryogenic Yb:YAG

    H. Furuse, SAIKI,Taku

    ASSPL 2009  2009.2 

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    Venue：Denver, USA  

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  • Oscillation Property of Rod-Type Nd/Cr:YAG Ceramic Lasers with Quasi-Solar Pumping

    SAIKI,Taku, S. Motokoshi, K. Imasaki, K. Fujioka, H. Fujita, M. Nakatsuka, Y. Izawa, C. Yamanaka

    IFSA  2007.9 

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    Venue：Kobe Convention Center, Kobe, Japan  

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  • Oscillation Property of Rod-Type Nd/Cr:YAG Ceramic Lasers with Quasi-Solar Pumping

    T. Saiki

    CLEO/QELS 2007  2007.5 

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  • Oscillation Property of Disk-type Nd/Cr:YAG Ceramic Lasers with Quasi-solar Pumping

    SAIKI,Taku, S. Uchida, M. Nakatsuka, K. Imasaki, S. Motokoshi, Y. Izawa, C. Yamanaka

    International Symposium on Beamed Energy Propulsion 4th, Nara, Nara, Japan, Nov. 15  2005.11 

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    Venue：Nara, Nara, Japan  

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  • Oscillation Property of Disk-type Nd/Cr:YAG Ceramic Lasers with Quasi-solar Pumping

    SAIKI,Taku, T. Bontoux

    CLEO/QELS 2005  2005.5 

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    Venue：Baltimore Convention Center, Baltimore, MD, USA  

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  • Development of Solar-pumped Lasers for Space Solar Power Station

    SAIKI,Taku, S. Uchida, S. Motokoshi, K. Imasaki, M. Nakatuska

    Final paper of International Astronautical Congress 2005  2005.4 

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    Venue：Fukuoka, Japan  

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  • Oscillating Characterization of Solar Pumped Nd/Cr:YAG Ceramic Disk Laser

    SAIKI,Taku, S. Uchida, M. Nakatsuka, K. Imasaki, S. Motokoshi, Y. Izawa, C. Yamanaka

    International Workshop on the Laser Energy Transmission for Space Exploration and Ground Applications  2004.6 

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    Venue：Nara hotel ,Nara, Japan  

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  • Solar‐Pumped Nd dope Multimode‐Fiber Laser with a D‐Shaped Large Clad

    SAIKI,Taku, S. Uchida, K. Imasaki, S. Motokoshi, M. Nakatuska

    AIP Conference Proceeding  2004.6 

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    Venue：Sendai, Japan  

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  • Concept of solar-pumped solid-state lasers for a solar powered satellite

    SAIKI,Taku, S. Uchida, K. Imasaki, S. Motokoshi, K. Tsubakimoto, H. Fujita, M. Nakatsuka, C. Yamanaka

    The 3rd Asian Pacific Laser Symposium, APLS  2002.9 

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    Venue：Senri Life Science Center, Osaka, Japan.  

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  • Calculation of excitation and oscillation for a solar-pumped solid-state laser

    T. Saiki, S. Uchida, K. Imasaki, S. Motokoshi, K. Tsubakimoto, H. Fujita, M. Nakatsuka, Y. Izawa, H. Nagayama, M. Mori, C. Yamanaka

    The 3rd Asian Pacific Laser Symposium, APLS2002  2002.9 

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    Venue：Senri Life Science Center, Osaka, Japan  

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  • Calculation on Propagation and Amplification of Partially Coherent Light with Peaky Electric Field

    SAIKI,Taku, T. Bontoux, N. Miyanaga, H. Fujita, H. Yoshida, T. Sakamoto, M. Nakatsuka, T. Kanabe, S. Nakai, C. Yamanaka

    CLEO/QELS  2001.5 

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    Venue：Baltimore, MD, USA  

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  • Calculation on Self-focusing of Amplified Partially Coherent Light

    T. Saiki, T. Bontoux, N. Miyanaga, H. Fujita, H. Yoshida, T. Sakamoto, M. Nakatsuka, T. Kanabe, S. Nakai

    SPIE AHPLA  1999.11 

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    Venue：Osaka University, Japan  

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  • Beam pattern and filling factor improvement for a Cassegrain three-pass amplifier using a new shape of optimized serrated apertures

    T. Bontoux, T. Saiki, T. Kanabe, H. Fujita, M. Nakatuska

    Second International Conference on Solid State Lasers for Application to ICF  1997.4 

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    Venue：Paris, France  

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  • Optimization of Cassegrain type 3-pass amplifier system with ASE

    T. Saiki, T. Bontoux, T. Kanabe, H. Fujita, M. Nakatsuka, S. Nakai

    IAEA-TCM  1997.3 

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    Venue：Osaka University,Japan  

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Social Activities

  • 電気学会 光エネルギー応用技術調査専門委員会

    2012.12 - 2014.11

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  • レーザー学会 編集委員会 幹事

    2008.1 - 2010.3

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Devising educational methods

  • Power Pointを独自に作成してプロジェクタによる授業の実施 大学院M光電波工学特論基礎の講義内容をWebで公開

Teaching materials

  • 大学院、教材、“M光電波工学特論基礎” 概要）電磁波を光領域に拡張して、光の特性や物質との相互作用についてまとめた。 コヒーレンス、高輝度レーザー光の発生方法、レーザーを用いた再生可能エネルギー生産（水素、空気電池用金属生産のための金属還元）、ナノテクノロジー（ナノ粒子生成、その応用等）

Teaching method presentations

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Special notes on other educational activities

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