Simulation study of broadband long-pulsed amplification in high-power laser systems  

作　　者：惠宏超 张军勇 卢兴华 张嘉琛 陈欣 姜秀青 朱宝强 林尊琪 

机构地区：[1]National Laboratory on High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences

出　　处：《Chinese Optics Letters》2016年第3期68-71,共4页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China under Grant No.61205212

摘　　要：Accurately and efficiently predicting the fundamental-frequency temporal shape of broadband long-pulsed lasers is very important in research on the properties of high-power laser amplifiers. In this study, we first propose that analytic electric polarization in the temporal domain is applied to broadband long-pulsed pulse amplification. We first verify the accuracy of this algorithm in the dozens of picoseconds range and the results are consistent with Miro software. Then we simulate the broadband long-pulsed amplification. The simulation results indicate that the front edge of the output pulse is more enlarged than the end edge owing to saturation and that the gain narrowing induces severe amplitude modulation. Analytic electric polarization in the temporal domain is effec- tive and precise for investigating the broadband pulse amplification in the time scale from dozens of picoseconds to nanoseconds, and the computation time can be decreased by at least 4 orders of magnitude.Accurately and efficiently predicting the fundamental-frequency temporal shape of broadband long-pulsed lasers is very important in research on the properties of high-power laser amplifiers. In this study, we first propose that analytic electric polarization in the temporal domain is applied to broadband long-pulsed pulse amplification. We first verify the accuracy of this algorithm in the dozens of picoseconds range and the results are consistent with Miro software. Then we simulate the broadband long-pulsed amplification. The simulation results indicate that the front edge of the output pulse is more enlarged than the end edge owing to saturation and that the gain narrowing induces severe amplitude modulation. Analytic electric polarization in the temporal domain is effec- tive and precise for investigating the broadband pulse amplification in the time scale from dozens of picoseconds to nanoseconds, and the computation time can be decreased by at least 4 orders of magnitude.

关 键 词：AMPLIFICATION Amplitude modulation High power lasers POLARIZATION 

分 类 号：TN722[电子电信—电路与系统] TP391.9[自动化与计算机技术—计算机应用技术]