低温冷却Yb:LuLiF結晶を用いたマルチmJ, 2波長ピコ秒再生チャープパルス増幅

Multi-millijoule picosecond regenerative chirped-pulse amplification of two wavelengths with cryogenically-cooled Yb:LuLiF crystal

赤羽 温; 青山 誠; 杉山 僚; 久保 亮一*; 小川 奏; 辻 公一; 山川 考一

Akahane, Yutaka; Aoyama, Makoto; Sugiyama, Akira; Kubo, Ryoichi*; Ogawa, Kanade; Tsuji, Koichi; Yamakawa, Koichi

低温冷却Yb:LuLiF結晶を用いて999nm及び1024nm波長でのチャープパルス再生増幅を行い、それぞれ6mJ, 8.5mJの出力を得た。出力光パルス幅は999, 1024nm出力でそれぞれ13ps, 27psに圧縮されており、非線形過程の誘起光として利用可能である。またこの再生増幅器では999, 1024nmの2波長同時発振も可能で、THz領域での差周波発生への応用が期待できる。

We have performed chirped-pulse regenerative amplification at 999 nm and 1024 nm wavelengths with cryogenically-cooled Yb:LuLiF crystal. High-energy amplified pulses with energies of 6 mJ and 8.5 mJ were obtained at 999 nm and 1024nm wavelengths, respectively. In the regen durations of output pulses were compressed to 13 ps and 27 ps, respectively by gain-narrrwoing, so these pulses are available as pump sources for nonlinear effects without additional pulse compression devices. Simultaneous two-color lasing was also performed in this study, which is available for differential frequency generation in THz region.