摘要

输出能量的稳定性是超短脉冲激光装置的一个重要指标。为提升SILEX-I超短脉冲激光装置放大前级的能量稳定性，通过实验测量了放大前级的再生放大器和预放大器及其抽运光的能量稳定性，发现抽运光的能量波动对再生放大器的能量稳定性影响较大，是放大前级输出能量波动的主要来源。为解决这一问题，采用Frantz-Nodvik方程和统计方法对抽运光波动造成的主激光波动进行了理论分析和数值模拟。分析了多种稳定性提升措施，如导出延后、饱和放大和多束抽运光抽运等。采用稳幅器件有效地提高了输出能量的稳定性，放大前级的输出能量波动的均方根值从4%左右降到1%以下。

Abstract

The stability of output energy is an important parameter for ultra-short laser facility. To improve the energy stability of the front amplifier in SILEX-I ultra-short laser facility, the energy fluctuation of regenerative amplifier and pre-amplifier and their pump laser are measured by experiment. It reveals that the fluctuation of the pump energy has great influence on the stability of regenerative amplifier. It is the main cause of the energy fluctuation of the front amplifier. To solve this problem, the fluctuation of the main laser caused by the unstable pump laser is simulated based on Frantz-Nodvik equation and statistical method. Ways of improving the stability have been analyzed such as delaying the output, saturated amplification, and using multiple pump lasers. Stabilization is achieved by adopting an amplitude stabilizer. The root mean square (RMS) of energy output is lowered from about 4% to below 1%.

补充资料

中图分类号：TN248.1

DOI：10.3788/aos201131.s100512

所属栏目：光电子学

基金项目：国防科技重点实验室基金(9140C680301100C6806)资助课题。

收稿日期：2011-02-24

修改稿日期：2011-03-24

网络出版日期：--

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联系人作者：黄晚晴(huangwq@caep.ac.cn)

备注：黄晚晴(1984—)，女，硕士，实习研究员，主要从事激光损伤和超短脉冲激光装置性能提升方面的研究。

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引用该论文

Huang Wanqing,Xie Na,Sun Li,Wang Xiaodong,Guo Yi,Li Qing. Improving Energy Stability of Front Amplifier in SILEX-I Laser Facility[J]. Acta Optica Sinica, 2011, 31(s1): s100512

黄晚晴,谢娜,孙立,王晓东,郭仪,李庆. SILEX-I超短脉冲激光装置放大前级输出能量稳定性提升[J]. 光学学报, 2011, 31(s1): s100512