高稳定激光脉冲波形精密调控技术研究与应用  

Precise laser pulse shaping technology and application with high energy stability

作　　者：宗兆玉 赵军普[1] 李森[1] 梁樾[1] 姚轲[1] 田小程[1] 黄小霞[1] 陈波[1] 郑万国[1] Zong Zhaoyu;Zhao Junpu;Li Sen;Liang Yue;Yao Ke;Tian Xiaocheng;Huang Xiaoxia;Chen Bo;Zheng Wanguo(Laser Fusion Research Center,CAEP,P.O.Box 919-988,Mianyang 621900,China;Graduate School of China Academy of Engineering Physics,Beijing 100088,China)

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621900 [2]中国工程物理研究院研究生院,北京100088

出　　处：《强激光与粒子束》2022年第3期55-61,共7页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(62075201,61805223)。

摘　　要：提出了基于激光脉冲波形精密调控和能量稳定性控制的双回路同步闭环设计方法,进而在任意波形发生器与预放大系统输出处建立脉冲波形闭环控制系统,在保偏大模场光纤放大器和再生放大器间建立能量稳定性闭环系统。依托大口径高通量实验平台,实现了激光脉冲波形的快速高稳定精密调控,脉冲波形闭环精度优于2%(RMS),脉冲能量稳定性优于5%(PV)。该技术成功应用到物理实验正式发射中,常规整形脉冲波形的功率准确度优于2%,相关结果有力支撑了ICF激光驱动器激光参数精密调控设计。Double circuit synchronous closed-loop design based on precise laser pulse waveform shaping and energy stability control was introduced.A pulse shaping closed-loop control system was established between arbitrary waveform generator and the output of preamplifier system,and an energy stability closed-loop system was established between polarization large-mode-area fiber amplifier and the regenerative amplifier.The laser pulse’s precise shaping with high energy stability was demonstrated based on the Integration Test Bed.And the closed-loop accuracy of the pulse waveform was better than 2%(RMS),and the energy stability was better than 5%(PV).The results were successfully applied to the formal launch of physical experiments,and the power accuracy of the conventional shaping pulse waveform was better than 2%.The successful demonstration of the double circuit synchronous closed loop system strongly supports the precise control design of the laser parameters of laser driver for ICF.

关 键 词：高功率激光装置 ITB平台 功率准确度 光束调控 脉冲精密整形 

分 类 号：TN248[电子电信—物理电子学]