高功率激光驱动器中幅频效应及其抑制技术研究进展  

Progress on FM-to-AM Effect and Its Suppression in High Power Laser Driver

作　　者：许党朋[1,2] 张锐[1] 田小程[1] 周丹丹[1] 朱娜[1] 宗兆玉 王建军[1] 李明中[1] 胡东霞[1] 朱启华[1] 张小民[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621900 [2]中国工程物理研究院北京研究生部,北京100088

出　　处：《激光与光电子学进展》2017年第2期51-62,共12页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61475145)

摘　　要：采用相位调制技术产生的具有一定光谱分布的相位调制脉冲可以有效抑制高功率激光驱动器中大口径光学元件的横向受激布里渊散射和满足光束匀滑需求,但该脉冲在装置各系统传输放大过程中,由于光谱畸变会引起幅频调制(FM-to-AM)效应,这种效应严重影响了激光装置的输出性能及实验效果。介绍了相位调制脉冲产生原理、引起FM-to-AM效应的根本原因及因素,综述了目前美国的国家点火装置、法国的兆焦耳装置以及我国的神光-Ⅲ主机装置在FM-to-AM效应抑制技术方面取得的重要进展。Laser pulse generated by phase modulation with certain spectrum distribution can suppress buildup of stimulated Brioullin scattering in large aperture laser optics and smooth the speckle pattern illuminating the target by spectral smoothing dispersion, but spectral distortion happening during the pulse transmission and amplification in each system of the laser facility can induce FM-to-AM effect, which will seriously affect the performance of the laser facility and physics experiments. The principal of phase modulated pulse, the reason why FM-to-AM effect happened and the factors which induced the FM-to-AM effect are introduced. And also the progress on suppression of FM-to-AM effect in National Ignition Facility, Laser Megajoule laser megaioule facility and SG-Ⅲ laser facility are reviewed.

关 键 词：激光光学 惯性约束聚变 激光驱动器 前端系统 FM-to-AM效应 

分 类 号：TN248.1[电子电信—物理电子学]