无光栅频率分辨光学开关行迹分析

周松; 彭志涛; 夏彦文; 孙志红; 董军

doi:doi:10.3788/hplpb20122409.2059

强激光与粒子束, 2012, 24 (9): 2059, 网络出版: 2012-09-12

无光栅频率分辨光学开关行迹分析

Effects of spatial beam profile on GRENOUILLE trace

论文大纲

周松 ^*彭志涛夏彦文孙志红董军

作者单位

中国工程物理研究院激光聚变研究中心，四川绵阳 621900

飞秒脉冲测量频率分辨光学开关无光栅频率分辨光学开关光束空间轮廓 femtosecond pulse measurement frequency-resolved optical gating grading-eliminated no-nonsense observation of ultr spatial beam profile

摘要

从无光栅频率分辨光学开关(GRENOUILLE)的测量原理出发，分析了不均匀的光束空间轮廓导致行迹畸变的原因，并通过数值方法模拟了GRENOUILLE内部存在的数据一致性校验机制对这种影响的抑制作用。结果表明:不均匀光束空间轮廓对GRENOUILLE测量结果的影响并不显著；实际测量中更应避免的是使用过小的光束口径，它将导致行迹不完整，从而显著影响时间波形的测量结果。

Abstract

In grading-eliminated no-nonsense observation of ultrafast incident laser light e-fields(GRENOUILLE) measurements of femtosecond laser pulse, a nonuniform spatial beam profile can largely distort the trace, which results in an inaccurate temporal measurement. The spatial beam profile effects on the GRENOUILLE trace are demonstrated both theoretically and numerically. Results from the numerical simulation show that due to the presence of feedback regarding the validity of the measurement data, the GRENOUILLE phase-retrieval algorithm is insensitive to trace distortion; hence a nonuniform spatial beam profile can hardly introduce any noticeable inaccuracy. Special attention should be paid to the situation where incident beam is too narrow to generate adequate delay between two replicas of the pulse, which leads to a clipped trace followed by a misleading temporal result.

参考文献

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周松, 彭志涛, 夏彦文, 孙志红, 董军. 无光栅频率分辨光学开关行迹分析[J]. 强激光与粒子束, 2012, 24(9): 2059. Zhou Song, Peng Zhitao, Xia Yanwen, Sun Zhihong, Dong Jun. Effects of spatial beam profile on GRENOUILLE trace[J]. High Power Laser and Particle Beams, 2012, 24(9): 2059.

无光栅频率分辨光学开关行迹分析

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