Dr. Koichi Yamakawa Profile

Dr. Koichi Yamakawa

at Japan Atomic Energy Agency

SPIE Involvement:

Author

Publications (13)

Proceedings Article | 25 February 2010 Paper

Compression of idler pulses with an identical positive dispersive media to signal pulse stretcher in ultrafast optical-parametric chirped-pulse amplification

Yutaka Akahane, Kanade Ogawa, Koichi Tsuji, Makoto Aoyama, Koichi Yamakawa

Proceedings Volume 7589, 75890L (2010) https://doi.org/10.1117/12.840595

KEYWORDS: Glasses, Ultrafast phenomena, Pulsed laser operation, Signal processing, Picosecond phenomena, Femtosecond phenomena, Crystals, Laser systems engineering, Oscillators, Fiber lasers

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Proceedings Article | 14 May 2008 Paper

Spectroscopic characterization of ultrashort laser driven targets incorporating both Boltzmann and particle-in-cell models

M. Sherrill, J. Abdallah, G. Csanak, E. Dodd, Y. Fukuda, Y. Akahane, M. Aoyama, N. Inoue, H. Ueda, K. Yamakawa, A. Ya Faenov, A. Magunov, T. Pikuz, I. Yu. Skobelev

Proceedings Volume 7005, 70051R (2008) https://doi.org/10.1117/12.784468

KEYWORDS: Plasmas, Picosecond phenomena, Autoregressive models, Argon, Photonic integrated circuits, Ionization, Ions, Sodium, Spectroscopy, Pulsed laser operation

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Proceedings Article | 23 March 2005 Paper

Diode-pumped Yb:YLF chirped-pulse regenerative amplifier for high average power operation

Junji Kawanaka, Hajime Nishioka, Koichi Yamakawa, Ken-ichi Ueda

Proceedings Volume 5777, (2005) https://doi.org/10.1117/12.611030

KEYWORDS: Crystals, Laser crystals, Semiconductor lasers, Optical amplifiers, Pulsed laser operation, Copper, Sapphire lasers, Liquid crystals, Diodes, Liquids

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Proceedings Article | 7 January 2004 Paper

X-ray radiation of clusters irradiated by ultrafast high-intensity laser pulses

Yuji Fukuda, Yutaka Akahane, Makoto Aoyama, Norihiro Inoue, Hideki Ueda, Yasuaki Kishimoto, Koichi Yamakawa, Anatoly Faenov, Alexandr Magunov, Tatiava Pikuz, Igor Skobelev, Joseph Abdallah, George Csanak, Alexei Boldarev, Vldaimir Gasilov

Proceedings Volume 5196, (2004) https://doi.org/10.1117/12.512291

KEYWORDS: Ions, X-rays, Argon, Electrons, Pulsed laser operation, Plasma, Satellites, Ionization, Picosecond phenomena, Krypton

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Proceedings Article | 12 December 2003 Paper

X-ray spectroscopic study on femto- and pico-second laser irradiated solid and gaseous targets

Masayuki Suzuki, Hiroyuki Daido, Fumiaki Matsuoka, Etsuya Yanase, Mamiko Nishiuchi, Keiko Suto, A. Sasaki, Koichi Yamakawa, Tetsuya Kawachi, Keisuke Nagashima, Takatsugu Oketa, Takeyoshi Nakayama, Ingo Uschmann, Eckhart Foerster, Henryk Fiedorowicz

Proceedings Volume 5228, (2003) https://doi.org/10.1117/12.536791

KEYWORDS: X-rays, Pulsed laser operation, Plasma, Spectroscopy, Laser energy, Krypton, Nitrogen, Oxygen, Ions, Xenon

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Proceedings Article | 10 November 2003 Paper

20-mJ diode-pumped chirped-pulse regenerative amplifier with a cooled Yb:LiYF4

Junji Kawanaka, Hajime Nishioka, Koichi Yamakawa, K. Ueda

Proceedings Volume 5120, (2003) https://doi.org/10.1117/12.515525

KEYWORDS: Crystals, Optical amplifiers, Laser crystals, Semiconductor lasers, Mirrors, Laser systems engineering, Laser development, Sapphire lasers, High power lasers, Reflectors

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Proceedings Article | 5 September 2002 Paper

Large-aperture CsLiB6O10 frequency doubler for high-energy Nd:glass laser

Hiromitsu Kiriyama, Norihiro Inoue, Koichi Yamakawa

Proceedings Volume 4914, (2002) https://doi.org/10.1117/12.481800

KEYWORDS: Crystals, Laser crystals, Second-harmonic generation, Nonlinear crystals, Laser energy, Energy efficiency, Pulsed laser operation, Optical amplifiers, Neodymium glass lasers, Laser systems engineering

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Proceedings Article | 8 May 1996 Paper

Techniques for controlling gain narrowing during ultrashort-pulse amplification

Koichi Yamakawa, Ting Guo, Georg Korn, Catherine Le Blanc, Ferenc Raksi, Christoph Rose-Petruck, Jeffrey Squier, Vladislav Yakovlev, Christopher Barty

Proceedings Volume 2701, (1996) https://doi.org/10.1117/12.239712

KEYWORDS: Fabry–Perot interferometers, Optical filters, Optical amplifiers, Amplifiers, Polarizers, Pulse shaping, Thin films, Ultrafast phenomena, Oscillators, Prisms

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Proceedings Article | 8 May 1996 Paper

Ultrashort-pulse, ultrahigh-peak-power Ti:sapphire lasers

Christopher Barty, Ting Guo, Catherine Le Blanc, Ferenc Raksi, Christoph Rose-Petruck, Jeffrey Squier, Kent Wilson, Vladislav Yakovlev, Koichi Yamakawa

Proceedings Volume 2701, (1996) https://doi.org/10.1117/12.239697

KEYWORDS: Optical amplifiers, Crystals, Pulse shaping, Sapphire lasers, Oscillators, Laser crystals, Fabry–Perot interferometers, Modulation, Femtosecond phenomena, Glasses

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Proceedings Article | 18 September 1995 Paper

Time-gated medical imaging with ultrafast laser-plasma x rays

Christopher Barty, Clarence Gordon, Brian Lemoff, Christoph Rose-Petruck, Ferenc Raksi, Perry Bell, Kent Wilson, Vladislav Yakovlev, Koichi Yamakawa, Guang-Yu Yin

Proceedings Volume 2523, (1995) https://doi.org/10.1117/12.220990

KEYWORDS: X-rays, Sensors, Microchannel plates, X-ray imaging, Scattering, Signal to noise ratio, Picosecond phenomena, Electrons, X-ray sources, Medical imaging

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Proceedings Article | 1 September 1995 Paper

Ultrafast x-ray absorbtion and diffraction

Christopher Barty, Ferenc Raksi, Christoph Rose-Petruck, Kenneth Schafer, Kent Wilson, Vladislav Yakovlev, Koichi Yamakawa, Zhiming Jiang, Abdelaziz Ikhlef, Christian Cote, Jean-Claude Kieffer

Proceedings Volume 2521, (1995) https://doi.org/10.1117/12.218356

KEYWORDS: X-rays, Absorption, X-ray diffraction, Ultrafast phenomena, Chemical species, Plasmas, Diffraction, Molecules, X-ray optics, X-ray sources

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Proceedings Article | 10 April 1995 Paper

Methods for generation of 10-Hz 100-TW optical pulses

Christopher Barty, Clarence Gordon, Brian Lemoff, Christoph Rose-Petruck, Ferenc Raksi, Christian Spielmann, Kent Wilson, Vladislav Yakovlev, Koichi Yamakawa

Proceedings Volume 2377, (1995) https://doi.org/10.1117/12.206418

KEYWORDS: Distortion, Optical amplifiers, Mirrors, Optical filters, Oscillators, Picosecond phenomena, Sapphire lasers, Dielectrics, Diffraction gratings, Telescopes

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Proceedings Article | 17 June 1993 Paper

1.5-TW 10-Hz Ti:sapphire laser system: design and performance

Pay Chiu, Art Magana, Koichi Yamakawa, Jeffrey Kmetec

Proceedings Volume 1861, (1993) https://doi.org/10.1117/12.147072

KEYWORDS: Laser systems engineering, Amplifiers, Optical amplifiers, Pulsed laser operation, Mirrors, Sapphire lasers, Nd:YAG lasers, Mode locking, Laser development, Solid state lasers

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Showing 5 of 13 publications

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