基于级联光电的ns激光脉冲高对比度波形测量  

High-contrast measurement for ns high-power laser pulse based on cascaded photodetection

作　　者：董军[1] 孙志红[1] 卢宗贵[1] 彭志涛[1] 夏彦文[1] 元浩宇[1] 张波[1] 刘华[1] 吕嘉坤 唐军[1] 

机构地区：[1]中国工程物理研究院激光聚变研究中心,四川绵阳621999

出　　处：《太赫兹科学与电子信息学报》2015年第6期971-975,共5页Journal of Terahertz Science and Electronic Information Technology

摘　　要：为满足激光驱动惯性约束聚变(ICF)点火中高对比度整形脉冲波形测试的需求,基于多脉冲波形拼接的级联光电探测法,在神光III主机装置上开展了ns高功率激光脉冲波形高对比度测量的实验研究。利用具有截止饱和特性的超快光电探测器,在实验中对凹形脉冲深度进行多通道波形测试。实验结果显示,经过多脉冲拼接得到的凹形脉冲底部具有350:1的对比度,远大于单通道单脉冲波形30:1的对比度。For the requirements of the measurement of the high-contrast shaped pulse Inertial Confinement Fusion(ICF) based on the cascaded photodetection of multiple pulses, experimental research on high-contrast measurement for ns high-power laser pulse is developed at SG-III laser system. Using the ultra-fast photodetector, the bottom of a concave pulse is measured through multi-channels in experiment. The experimental results show that the concave pulse obtained by the multi-pulses joint is of the contrast of 350:1 better than 30:1 obtained through single channel.

关 键 词：级联光电探测 对比度 脉冲 波形拼接 

分 类 号：TL632[核科学技术—核技术及应用]