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5 PW超短脉冲空间滤波器色差对时间信噪比的影响

Influence of Chromatic Aberration from Spatial Filters for 5 PW Ultra-Short Pulses on Temporal Contrast

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摘要

研究了大口径级联空间滤波器中色差造成的离焦色散与传输时间延迟对超短脉冲波形与时间信噪比的影响。针对神光-5 PW高功率超短脉冲系统, 通过数值模拟, 定量分析了光束口径、色差等因素与近远场脉冲波形畸变和时间信噪比退化的关系。从脉冲波形和时间信噪比的角度, 给出了大口径空间滤波器消色差后残余色差的容忍范围, 为高功率超短脉冲系统中空间滤波器的设计与优化提供了理论依据。

Abstract

The influences of defocus dispersion and propagation time delay, which are caused by the chromatic aberration in cascade large-diameter spatial filters, on the ultra-short pulse shape and the temporal contrast are investigated. The relationship among beam diameter, chromatic aberration, pulse shape distortion and temporal contrast degradation in both near and far fields is quantitatively analyzed by the numerical simulation. From the perspective of pulse shape and temporal contrast, the tolerance range of residual chromatic aberration from large-diameter spatial filters after achromatism is given, which provides a theoretical foundation for the design and optimization of spatial filters in a high power ultra-short pulsed laser system.

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中图分类号:O436

DOI:10.3788/aos201737.0914005

所属栏目:激光器与激光光学

基金项目:国家863计划(2013AA8044010)、国家自然科学基金(11304332)

收稿日期:2017-05-05

修改稿日期:2017-05-18

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朱 坪:中国科学院上海光学精密机械研究所高功率激光物理联合实验室, 上海 201800中国科学院大学, 北京 100049
谢兴龙:中国科学院上海光学精密机械研究所高功率激光物理联合实验室, 上海 201800
朱健强:中国科学院上海光学精密机械研究所高功率激光物理联合实验室, 上海 201800

联系人作者:朱坪(zhp1990@siom.ac.cn)

备注:朱 坪(1990-), 男, 博士研究生, 主要从事超短脉冲光学系统设计、波前质量控制方面的研究。

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引用该论文

Zhu Ping,Xie Xinglong,Zhu Jianqiang. Influence of Chromatic Aberration from Spatial Filters for 5 PW Ultra-Short Pulses on Temporal Contrast[J]. Acta Optica Sinica, 2017, 37(9): 0914005

朱 坪,谢兴龙,朱健强. 5 PW超短脉冲空间滤波器色差对时间信噪比的影响[J]. 光学学报, 2017, 37(9): 0914005

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