基于变焦像传递的飞秒拍瓦激光系统色差补偿  

Compensation for Chromatic Aberration in Femtosecond Petawatt Laser Systems Based on Zoom Image Transfer

作　　者：崔自若 康俊[1] 谢兴龙[1] 高奇[1] 朱坪 郭爱林[1] 朱海东[1] 杨庆伟[1] 孙美智[1] 杨鹏千 欧阳小平[1] 张志祥[1] 梁潇[1,2] 杨顺华 张诚 张栋俊 朱健强 Cui Ziruo;Kang Jun;Xie Xinglong;Gao Qi;Zhu Ping;Guo Ailin;Zhu Haidong;Yang Qingwei;Sun Meizhi;Yang Pengqian;Ouyang Xiaoping;Zhang Zhixiang;Liang Xiao;Yang Shunhua;Zhang Cheng;Zhang Dongjun;Zhu Jianqiang(Key Laboratory of High Power Laser and Physics , Shanghai Institute of Optics and Fine Mechanics ,Chinese Academy of Sciences , Shanghai 201800, China;Center of Materials Science and Optoeletronics Engineering , University of Chinese Academy of Sciences ,Beijing 100049, China)

机构地区：[1]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 [2]中国科学院大学材料与光电研究中心,北京100049

出　　处：《中国激光》2019年第9期191-195,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金(11304332,11704392,61705245)

摘　　要：高功率超短脉冲激光系统中,空间滤波器透射元件引入的色差会影响系统的聚焦功率密度。针对这一问题,提出一种具备动态调节能力的色差预补偿方案。该方案由正负透镜和反射系统构成共焦像传递系统,能够实现全系统色差的动态精确补偿。基于该方案为神光-II 5 PW(SG-II 5 PW)激光系统设计并搭建了色差预补偿光路。实验结果表明,通过精密调节该单元内部透镜间距能够精确补偿全系统的色差,显著提升系统峰值功率密度。经过色差补偿后,在SG-II 5 PW系统开展质子加速实验,获得了超过16 MeV的质子产额。A chromatic aberration pre-compensation scheme with dynamic adjustment ability is proposed to address the problem that chromatic aberration introduced by transmission-based spatial filters in ultrashort high-power laser systems strongly affects the focused intensity. In the pre-compensation scheme, the confocal transfer system comprises of a group of concave lenses and a reflecting system. The proposed scheme can realize dynamic precise compensation for chromatic aberration in the total system. Based on the proposed scheme, an optical path of chromatic aberration compensation is designed and established for the Shen-Guang-II 5 PW(SG-II 5 PW) laser system. The experimental results verify that chromatic aberration in the laser system can be fully corrected by accurately adjusting the pre-compensator, and the peak power density is improved significantly. A proton energy greater than 16 MeV is obtained in the proton acceleration experiment with the SG-II 5 PW laser system after chromatic aberration compensation.

关 键 词：激光光学 高功率超短脉冲激光 宽带激光 空间滤波器 色差 传输时间延迟 

分 类 号：O436[机械工程—光学工程]