钕玻璃多程放大系统宽带输出特性研究  

Broadband Output Characteristics of Nd…Glass Multi-Pass Amplification System

作　　者：管相合 张艳丽[1,2] 张军勇 朱健强[1,2] Guan Xianghe;Zhang Yanli;Zhang Junyong;Zhu Jianqiang(National Laboratory on High Power Laser and Physics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;National Laboratory on High Power Laser and Physics,China Academy of Engineering Physics,Chinese Academy of Sciences,Shanghai 201800,China;University of Chinese Academy of Sciences,Beijing100049,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]中国科学院中国工程物理研究院高功率激光物理联合实验室,上海201800 [3]中国科学院大学,北京100049

出　　处：《中国激光》2020年第9期50-59,共10页Chinese Journal of Lasers

基　　金：中国科学院国际合作局对外合作重点项目资助(181231KYSB20170022)。

摘　　要：根据啁啾脉冲宽带放大动力学理论,采用数值模拟的方法对啁啾脉冲在钕玻璃多程放大系统中的放大特性及脉宽压缩特性进行了系统分析。首先分析了光谱未预补偿情况下,放大系统不同输入参数配置对放大脉冲各参数特性以及压缩后脉冲脉宽、信噪比的影响。利用基于修正输入的正向反馈迭代方法,获得了输出脉冲一定的情况下,所需要的输入脉冲波形和频谱分布。最后,将啁啾脉冲扩展至三维空间,反演分析计算小信号增益系数在空间非均匀分布时的脉冲放大特性,给出啁啾宽带放大计算中数据量大的解决方法。本文结果对高功率钕玻璃多程放大系统的啁啾脉冲放大优化设计有一定的参考意义。Based on the theory of chirped pulse broadband amplification dynamics,this paper systematically analyzes the amplification characteristics and pulse width compression characteristics of chirped pulses in Nd:glass multi-pass amplification systems using numerical simulation.The effects of different input parameter configurations of the amplification system on the characteristics of the amplified pulse parameters,the pulse width and the compressed pulse signal-to-noise ratio were analyzed without spectral pre-compensation.By using the forward iterative algorithm based on the modified input pulse,the required input pulse waveform and spectral distribution were obtained for a given output pulse.The inversion calculation of chirped pulses with three-dimensional spatial distribution is performed,and the amplification characteristics of small signal gain coefficient with spatial inhomogeneous distribution are analyzed.A solution to the large amount of data in broadband amplification calculation is given.The results of this paper can be used as a reference for the optimal design of chirped pulse amplification in high power Nd:glass multi-pass amplification system.

关 键 词：激光器 啁啾脉冲 钕玻璃 多程放大 波形反演 三维分布 

分 类 号：TN249[电子电信—物理电子学]