論文 - 加来 昌典
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Kanai T., Suda A., Bohman S., Kaku M., Yamaguchi S., Midorikawa K.
Applied Physics Letters 92 ( 6 ) 2008年2月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Applied Physics Letters
We have developed a beam stabilization system for high-power femtosecond lasers operating at a repetition rate of 1 kHz. The beam pointing at a hollow fiber input was stabilized to within 1 μm rms and the fluctuations of the broadened spectra and power were significantly improved. This technique enables us to increase the input power to a hollow fiber for intense few-cycle pulse generation. © 2008 American Institute of Physics.
DOI： 10.1063/1.2842414
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Pointing stabilization of a high-repetition rate high-power femtosecond laser for intense few-cycle pulse generation 査読あり
Takuya Kanai, Akira Suda, Samuel Bohman, Masanori Kaku, Shigeru Yamaguchi, and Katsumi Midorikawa
Applied Physics Letters 92 061106-1 - 061106-3 2008年2月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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High-intensity subpicosecond vacuum ultraviolet laser system 査読あり
Shoichi Kubodera, Masanori Kaku, Yuta Taniguchi, Masahito Katto, Atsushi Yokotani, Noriaki Miyanaga, and Kunioki Mima
Proceedings of SPIE 6874 68740L1 - 68740L8 2008年2月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Generation of TW-class 2-cycle pulses using a pressure-gradient hollow fiber
Bohman S., Suda A., Kaku M., Kanai T., Yamaguchi S., Midorikawa K.
Optics InfoBase Conference Papers 2008年
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Optics InfoBase Conference Papers
We demonstrate generation of intense 5 fs pulses using a pressure gradient hollow fiber. The beam after pulse compression could be focused to a diffraction-limited spot with an intensity of 3×10 18 W/cm 2 . © 2008 Optical Society of America.
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OFI rare-gas excimer amplifier for intense sub-picosecond VUV pulse generation
Kaku M., Taniguchi Y., Oda K., Katto M., Yokotani A., Kubodera S., Miyanaga N., Mima K.
Optics InfoBase Conference Papers 2008年
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Optics InfoBase Conference Papers
We report the Ar 2 * amplification with a gain-length product of 6 pumped by a high- intensity laser and the generation of subpicosecond seed pulses at 126 nm using harmonic radiation of an infrared Ti:Sapphire laser. © 2008 Optical Society of America.
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OFI rare-gas excimer amplifier for intense sub-picosecond VUV pulse generation
Kaku M., Taniguchi Y., Oda K., Katto M., Yokotani A., Kubodera S., Miyanaga N., Mima K.
Optics InfoBase Conference Papers 2008年
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Optics InfoBase Conference Papers
We report the Ar 2 amplification with a gain-length product of 6 pumped by a high- intensity laser and the generation of subpicosecond seed pulses at 126 nm using harmonic radiation of an infrared Ti:Sapphire laser. © 2008 Optical Society of America.
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Generation of TW-class 2-cycle pulses using a pressure-gradient hollow fiber
Bohman S., Suda A., Kaku M., Kanai T., Yamaguchi S., Midorikawa K.
Optics InfoBase Conference Papers 2008年
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Optics InfoBase Conference Papers
We demonstrate generation of intense 5 fs pulses using a pressure gradient hollow fiber. The beam after pulse compression could be focused to a diffraction-limited spot with an intensity of 3×10 18 W/cm 2 . © 2008 Optical Society of America.
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窪寺 昌一, 加来 昌典
電気学会研究会資料. OQD, 光・量子デバイス研究会 2007 ( 60 ) 31 - 35 2007年12月
記述言語：日本語 掲載種別：研究論文（学術雑誌）
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甲藤 正人, 小田 一義, 谷口 雄太, 加来 昌典, 横谷 篤至, 窪寺 昌一, 宮永 憲明, 三間 國興
レーザー学会研究会報告 = Reports on the Topical meeting of the Laser Society of Japan 368 13 - 18 2007年12月
記述言語：日本語 掲載種別：研究論文（学術雑誌）
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高強度真空紫外エキシマレーザー
窪寺昌一，加来昌典
電気学会光・量子デバイス研究会資料 OQD-07-64 31 - 35 2007年12月
記述言語：日本語 掲載種別：研究論文（その他学術会議資料等）
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高輝度真空紫外コヒーレント光源の開発 査読あり
甲藤正人，小田一義，谷口雄太，加来昌典，横谷篤至，窪寺昌一，宮永憲明，三間國興
レーザー学会第368回研究会報告 13 - 18 2007年12月
記述言語：日本語 掲載種別：研究論文（その他学術会議資料等）
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Kaku M., Suetake S., Senba Y., Sato Y., Katto M., Kubodera S.
Pacific Rim Conference on Lasers and Electro-Optics, CLEO - Technical Digest 2007年12月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Pacific Rim Conference on Lasers and Electro-Optics, CLEO - Technical Digest
Characteristics of emitted particles from a laser-produced tin plasma using a colloidal tin dioxide nano-particle jet target were investigated. By using double laser pulses, the EUV conversion efficiency at 13.5 nm and the ion energy were simultaneously regulated. Deposited amount of tin oxide was not well controlled, however.
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Optical amplification of vacuum ultraviolet argon excimer produced by a high-intensity laser
Kaku M., Taniguchi Y., Hosotani A., Katto M., Yokotani A., Kubodera S., Miyanaga N., Mima K.
Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS 370 - 371 2007年12月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS
We report the Ar 2 amplification with a gain-length product of 6 pumped by a high-intensity laser and the generation of subpicosecond seed pulses at 126 nm using harmonic radiation of an infrared Ti: Sapphire laser. ©2007 IEEE.
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OFI vacuum ultraviolet rare-gas excimer amplifier for subpicosecond VUV pulse amplification
Kaku M., Taniguchi Y., Hosotani A., Katto M., Yokotani A., Miyanaga N., Mima K., Kubodera S.
Pacific Rim Conference on Lasers and Electro-Optics, CLEO - Technical Digest 2007年12月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Pacific Rim Conference on Lasers and Electro-Optics, CLEO - Technical Digest
We evaluated amplification characteristics of the nanosecond vacuum ultraviolet argon excimer emission at 126 nm, whose kinetics was initiated by high-intensity femtosecond laser-produced electrons. Subpicosecond 126 nm emissions were produced simultaneously as a result of the nonlinear wavelength conversion, which will be amplified in the amplifier.
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Generation of intense vacuum ultraviolet radiations for advanced materials processing
Katto M., Yokotani A., Kubodera S., Kaku M., Hosotani A., Miyanaga N., Mima K.
26th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2007 - Congress Proceedings 2007年12月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：26th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2007 - Congress Proceedings
We have been developing high intensity vacuum ultraviolet (VUV) laser system for advanced applications such as micro and precise processing and photochemical reactions. We propose and construct a new VUV laser system to generate an output energy of sub mJ with a pulse width of subpicosecond at the wavelength of 126nm. A seed pulse was generated in Xe as the 7th harmonics of a 882 nm Ti:sapphire laser, and the Ar 2 * amplifier media were generated in an optical-field-induced ionization Ar plasma produced by another 785 nm Ti:sapphire laser. The VUV radiation should be further amplified in a discharge-pumped Ar 2 * amplifier, which is under construction.
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Kaku M., Katto M., Kubodera S.
26th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2007 - Congress Proceedings 2007年12月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：26th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2007 - Congress Proceedings
We investigated the effective technique for debris suppression of a laser-produced tin plasma using a colloidal tin dioxide jet target, as well as the EUV emission and debris characteristics of the target. By using double pulse laser irradiation with an optimum delay of 100 ns, the EUV conversion efficiency of 1.2% at 13.5 nm was observed. The peak energy and intensity of ionic debris were simultaneously reduced by the double laser pulse irradiation. The peak kinetic energy of the singly-ionized tin ion was reduced from 9 to 3 keV, when an expanding low-density preplasma was produced. The dominant debris from a laser-produced tin plasma, which was deposited on a witness plate, was found to be oxidized tin (SnO x ). By heating a witness plate at 100 °C, the deposited debris amount decreased to approximately one third.
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Generation of extreme ultraviolet continuum radiation driven by sub-10-fs two-color field
Kaku M., Oishi Y., Suda A., Kannari F., Midorikawa K.
Springer Series in Optical Sciences 132 413 - 419 2007年12月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Springer Series in Optical Sciences
We observed extreme ultraviolet (XUV) continuum radiation generated by using a sub-10-fs two-color pulse. When a laser field consisting of fundamental and its second harmonic pulses with parallel polarization was applied to high-order harmonic generation in argon, a continuum spectrum centered at 30 nm was obtained with an energy as high as 10 nJ. The broadband radiation indicates the possibility of generating powerful single attosecond pulses in the XUV region. © 2007 Springer-Verlag New York.
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Bohman S., Kaku M., Suda A., Yamaguchi S., Midorikawa K.
Conference on Quantum Electronics and Laser Science (QELS) - Technical Digest Series 2007年12月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Conference on Quantum Electronics and Laser Science (QELS) - Technical Digest Series
We propose and demonstrate a pulse compression technique using a symmetric pressure-gradient hollow fiber. This technique improves the spatial and spectral qualities of multi-mJ femtosecond laser pulses spectrally-broadened by self-phase modulation. ©2007 Optical Society of America.
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Bohman S., Kaku M., Suda A., Yamaguchi S., Midorikawa K.
Conference on Lasers and Electro-Optics, 2007, CLEO 2007 2007年12月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Conference on Lasers and Electro-Optics, 2007, CLEO 2007
We propose and demonstrate a pulse compression technique using a symmetric pressure-gradient hollow fiber. This technique improves the spatial and spectral qualities of multi-mJ femtosecond laser pulses spectrally-broadened by self-phase modulation. © 2007 Optical Society of America.
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Kaku M., Suda A., Bohman S., Yamaguchi S., Midorikawa K.
Conference on Quantum Electronics and Laser Science (QELS) - Technical Digest Series 2007年12月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Conference on Quantum Electronics and Laser Science (QELS) - Technical Digest Series
We report the single-shot observation of quasi-continuum high-harmonic spectrum with a harmonic energy of 10 nJ in the XUV region by using a two-color laser field. It indicates a possibility of generating single attosecond pulses. ©2006 Optical Society of America.