Hirofumi Kan
Japan Atomic Energy Agency
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Publication
Featured researches published by Hirofumi Kan.
Advanced Solid-State Photonics (TOPS) (2005), paper 613 | 2005
Ryo Yasuhara; Masanobu Yamanaka; Takayoshi Norimatsu; Yasukazu Izawa; Toshiyuki Kawashima; Tadashi Ikegawa; Osamu Matsumoto; Takashi Sekine; Takashi Kurita; Hirofumi Kan; Hiroyuki Furukawa
A novel, scalable Faraday rotator has been designed for high-average-power lasers in a gas-cooled multi-disk scheme. The concept with a negligible thermal distortion and birefringence is feasible up to 10 kW/cm2 enough below fracture limit.
Advanced Solid-State Photonics (2009), paper WB24 | 2009
Junji Kawanaka; Stuart Pearce; Akira Yoshida; Ryo Yasuhara; Ryuji Katai; Toshiyuki Kawashima; Hirofumi Kan
A diode-pumped MOPA laser system with 0.2-J pulse energy and 100-Hz repetition rate has been demonstrated with liquid-nitrogen-cooled Yb:YAG crystals. The slope efficiency was as high as 30% in the four-pass main amplifier.
Lasers, Sources and Related Photonic Devices (2010), paper AWB27 | 2010
Takuya Nakanishi; Yasuki Takeuchi; Akira Yoshida; Junji Kawanaka; Ryo Yasuhara; Toshiyuki Kawashima; Hirofumi Kan
A regenerative amplifier by using total-reflection active-mirror with a cryogenic YAG/Yb:YAG composite ceramics has been demonstrated up to kHz repetition rate. A 6.5-mJ pulse energy and a 9.3% optical efficiency were obtained at 200-Hz.
Advanced Solid-State Photonics (2008), paper MC6 | 2008
Ryo Yasuhara; Takashi Sekine; Takashi Kurita; Tadashi Ikegawa; Osamu Matsumoto; Toshiyuki Kawashima; Masahiro Miyamoto; Hirofumi Kan; Hidetsugu Yoshida; Junji Kawanaka; Masahiro Nakatsuka; Yasukazu Izawa; Tadashi Kanabe
The near diffraction limited quality of 21.3 J in 8.9 ns (2.4 GW peak power) at 10Hz rep-rate beam has been obtained by diode-pumped Nd:glass zig-zag slab laser with a stimulated Brillouin scattering (SBS) mirror.
Advanced Solid-State Photonics (2007), paper MB14 | 2007
Ryo Yasuhara; Shigeki Tokita; Junji Kawanaka; Hideki Yagi; Hoshiteru Nozawa; Takagimi Yanagitani; Toshiyuki Kawashima; Hirofumi Kan
As the first demonstration of Faraday effect in a TGG ceramics, its Verdet constant at 1053nm was evaluated to be 1453 rad/Tm at 7.8 K which is 40 times greater than that at 300 K.
Advanced Solid-State Photonics (2005), paper WB3 | 2005
Ryo Yasuhara; Masanobu Yamanaka; Takayoshi Norimatsu; Yasukazu Izawa; Toshiyuki Kawashima; Hirofumi Kan; Hiroyuki Furukawa
Detailed computation and experimental results of thermal birefringence loss in TGG and glass based Faraday rotator rod was presented. These data will be useful for designing a laser system and a thermally compensated Faraday rotator.
Applied Sciences | 2013
Hiromitsu Kiriyama; Takuya Shimomura; Michiaki Mori; Yoshiki Nakai; Manabu Tanoue; Shuji Kondo; Shuhei Kanazawa; Alexander S. Pirozhkov; Timur Zh. Esirkepov; Y. Hayashi; K. Ogura; Hideyuki Kotaki; Masayuki Suzuki; I. Daito; Hajime Okada; Atsushi Kosuge; Y. Fukuda; Mamiko Nishiuchi; M. Kando; Sergei V. Bulanov; Keisuke Nagashima; Mitsuru Yamagiwa; Kiminori Kondo; Akira Sugiyama; Paul R. Bolton; Shinichi Matsuoka; Hirofumi Kan
Archive | 2003
Akira Shirakawa; Ken-ichi Ueda; Hirofumi Kan; Hirofumi Miyajima
Archive | 1999
Hirofumi Miyajima; Hirofumi Kan; Toshio Naitoh; Hirokazu Ohta; Takeshi Kanzaki
レーザー研究 | 2012
Hiromitsu Kiriyama; Masayuki Suzuki; I. Daito; Hajime Okada; Yoshihiro Ochi; Masatoshi Sato; Yoshinori Tamaoki; Takehiro Yoshii; Junya Maeda; Shinichi Matsuoka; Hirofumi Kan; K. Nagashima; Akira Sugiyama; Kiminori Kondo; R Bolton Paul; Shunichi Kawanishi; H. Daido; Toyoaki Kimura; Toshiki Tajima
