在钛宝石激光系统中使用非线性前置放大器产生高对比度、高强度激光脉冲。

High-contrast, high-intensity laser pulse generation using a nonlinear preamplifier in a Ti:sapphire laser system.

作者信息

Kiriyama Hiromitsu, Mori Michiaki, Nakai Yoshiki, Shimomura Takuya, Tanoue Manabu, Akutsu Atushi, Kondo Shuji, Kanazawa Shuhei, Okada Hajime, Motomura Tomohiro, Daido Hiroyuki, Kimura Toyoaki, Tajima Toshiki

机构信息

Advanced Photon Research Center, Japan Atomic Energy Agency, Kizugawa-city, Kyoto, Japan.

出版信息

Opt Lett. 2008 Apr 1;33(7):645-7. doi: 10.1364/ol.33.000645.

DOI:10.1364/ol.33.000645

PMID:18382504

Abstract

We report a high-contrast, high-intensity Ti:sapphire chirped-pulse amplification system that incorporates a nonlinear preamplifier based on optical parametric chirped-pulse amplification (OPCPA). By cooling the Ti:sapphire crystal in the final amplifier down to 77 K, the chirped-pulses are amplified to 2.9 J at a 10 Hz repetition rate without a thermal lensing effect. Pulse compression down to 19 fs duration obtained after amplification indicates a peak power of 80 TW. With the OPCPA, the temporal contrast is significantly improved to better than 7x10(-9) in a few picoseconds interval prior to the main laser pulse.

摘要

我们报道了一种高对比度、高强度的钛宝石啁啾脉冲放大系统，该系统包含一个基于光参量啁啾脉冲放大（OPCPA）的非线性前置放大器。通过将最终放大器中的钛宝石晶体冷却至77 K，啁啾脉冲在10 Hz重复频率下被放大至2.9 J，且无热透镜效应。放大后获得的脉冲压缩至19 fs持续时间，表明峰值功率为80 TW。使用OPCPA，在主激光脉冲之前的几皮秒间隔内，时间对比度显著提高至优于7×10⁻⁹。