Suppression of nanosecond prepulses from regenerative amplifier and multipass amplifiers in the SULF-1PW laser  

作　　者：白培乐 张宗昕 王新亮 钱佳毅 朱佳诚 吴分翔 胡家兵 杨晓骏 归佳彦 陆效明 刘彦祺 许毅 梁晓燕 冷雨欣 李儒新 Peile Bai;Zongxin Zhang;Xinliang Wang;Jiayi Qian;Jiacheng Zhu;Fenxiang Wu;Jiabing Hu;Xiaojun Yang;Jiayan Gui;Xiaoming Lu;Yanqi Liu;Yi Xu;Xiaoyan Liang;Yuxin Leng;Ruxin Li(State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science,Shanghai Institute of Optics and Fine Mechanics(SIOM),Chinese Academy of Sciences(CAS),Shanghai 201800,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science,Shanghai Institute of Optics and Fine Mechanics(SIOM),Chinese Academy of Sciences(CAS),Shanghai 201800,China [2]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Optics Letters》2024年第5期75-79,共5页中国光学快报（英文版）

基　　金：This work was supported by the National Key R&D Program of China(Nos.2017YFE0123700 and 2022YFA1604401);the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB1603);the National Natural Science Foundation of China(Nos.61925507 and 62375273);the Program of Shanghai Academic/Technology Research Leader(No.18XD1404200);the Shanghai Municipal Science and Technology Major Project(No.2017SHZDZX02).

摘　　要：In this research,we report the latest progress in the suppression of nanosecond prepulses from regenerative amplifier and multipass amplifiers in the SULF-1PW laser.The prepulse generated from the Pockels cell(PC)in a regenerative amplifier is delay-shifted by enlarging the distance between the PC and the nearby cavity mirror,and then removed by the extra pulse pickers outside the regenerative amplifier.The prepulses arising from multipass amplifiers are also further suppressed by adopting a novel amplifier configuration and properly rotating the Ti:sapphire crystals.After the optimizations,the temporal contrast on a nanosecond time scale is promoted to be better than a contrast level of 10^(-9).This research can provide beneficial guidance for the suppression of nanosecond prepulses in the high-peak-power femtosecond laser systems.

关 键 词：high-peak-power femtosecond laser nanosecond prepulses temporal contrast 

分 类 号：TN248[电子电信—物理电子学] TN722