激光与光电子学进展, 2017, 54 (2): 020005, 网络出版: 2017-02-10
高功率激光驱动器中幅频效应及其抑制技术研究进展 
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Progress on FM-to-AM Effect and Its Suppression in High Power Laser Driver
激光光学 惯性约束聚变 激光驱动器 前端系统 FM-to-AM效应 laser optics inertial confinement fusion laser driver front-end system FM-to-AM effect
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。
Abstract
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 Mégajoule laser megaioule facility and SG-Ⅲ laser facility are reviewed.
许党朋, 张锐, 田小程, 周丹丹, 朱娜, 宗兆玉, 王建军, 李明中, 胡东霞, 朱启华, 张小民. 高功率激光驱动器中幅频效应及其抑制技术研究进展[J]. 激光与光电子学进展, 2017, 54(2): 020005. Xu Dangpeng, Zhang Rui, Tian Xiaocheng, Zhou Dandan, Zhu Na, Zong Zhaoyu, Wang Jianjun, Li Mingzhong, Hu Dongxia, Zhu Qihua, Zhang Xiaomin. Progress on FM-to-AM Effect and Its Suppression in High Power Laser Driver[J]. Laser & Optoelectronics Progress, 2017, 54(2): 020005.
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