高功率激光装置前端和预放大系统精密调控技术进展  

Progress in Precision Control Technology of Front⁃End and Pre⁃Amplification Systems for High⁃Power Laser Facilities

作　　者：范薇[1,2] 汪小超 王江峰[1,2] 黄大杰 卢兴华[1] 陈伟 张雨佳[1,2] 张天宇[1,2] 李学春[1,2] 朱健强 Fan Wei;Wang Xiaochao;Wang Jiangfeng;Huang Dajie;Lu Xinghua;Chen Wei;Zhang Yujia;Zhang Tianyu;Li Xuechun;Zhu Jianqiang(National Laboratory on High Power Laser and Physics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;Center of Materials Science and Optoelectronics 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》2024年第11期72-91,共20页Chinese Journal of Lasers

基　　金：中国科学院战略性先导科技专项(A类)(XDA25020303)。

摘　　要：高功率激光装置是研究激光聚变和高能量密度物理的重要技术手段之一。激光聚变点火对激光装置的能量控制精度、时间功率曲线的控制能力、光谱的控制以及近远场光束质量的控制等都提出了极高的要求,这些参数都能直接影响到激光聚变的物理实验结果。国内高功率激光装置的前端和预放大系统在过去60余年取得了巨大进步,从最初单一的时间波形控制和同步静态控制发展到了当前的激光光束的高稳定全域主动控制。综述了神光II系列激光装置前端和预放大激光系统的精密调控技术的发展历程。Significance The inertial confinement fusion(ICF)high-power laser facility is an important driver of laser fusion ignition and highenergy-density physics.To achieve fusion ignition,the energy control accuracy,time-power curve controllability,spectral control,and control of near-and far-field beam quality directly affect the results of fusion-ignition physics experiments.High-power laser devices have been developed in China for more than 60 years,and the front-end and pre-amplification technologies of high-power laser facilities have evolved from single-time waveform control and synchronous static control to the high stability and global active controllability of laser beams.This paper describes the development of precision control technology for front-end and pre-amplification laser systems in SG-Ⅱseries facilities.Progress A high-power laser driver is primarily composed of a front-end system,pre-amplification system,main amplification system,and terminal system.The front-end and preamplification systems serve as the driver source,which is typically referred to as the laser injection system.The front-end system serves three major functions:(i)provide seed pulses to the device to satisfy various requirements with the corresponding functions and accurate synchronization;(ii)control the laser time domain,frequency domain,and signal-to-noise ratio(SNR);(iii)perform detection and abnormal feedback control.Similarly,the pre-amplification system serves three major functions:(i)pre-amplify the pulse energy to realize the J-level energy output of the shaping pulse;(ii)precisely control the nearfield distribution of the beam and gain spectral pre-compensation;(iii)control the service capabilities of the device,which provides output laser pulses with a certain repetition rate and energy for the subsequent auto-collimation system of the optical path,wave-front correction,and system-operation monitoring.The ICF high-power laser device includes multiple main nanosecond laser pulses and short picosecond pulses.The former is i

关 键 词：激光技术 激光聚变 激光驱动器 高功率激光装置 激光调控 

分 类 号：O436[机械工程—光学工程]