KDP晶体中高频相位调制对神光Ⅱ升级装置的影响  

Effects of Phase Perturbation of KDP Crystal in Middle and High Spatial Frequency on SGⅡ Updated Laser Facility

作　　者：刘栋[1] 季来林[1] 王利[2] 朱海东[2] 郭爱林[2] 马伟新[1] 朱俭[1] 

机构地区：[1]中国工程物理研究院上海激光等离子体研究所,上海201800 [2]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

出　　处：《中国激光》2013年第10期58-63,共6页Chinese Journal of Lasers

摘　　要：在高功率激光装置中,大口径电光开关晶体KDP在表面抛光过程中会引入大量的中高频调制,这种中高频段调制会对高功率激光驱动器性能产生影响。基于快速傅里叶变换理论和元件波前数据,对神光Ⅱ升级装置进行了计算模拟,研究中高频调制对光束近场均匀性和远场聚焦能力的影响,并且讨论了在光束传输放大过程中该频段调制对装置的可能危害。The perturbation of middle and high spatial frequency caused by the polish process of the large aperture KDP crystal in high-power laser system has a certain impact on the performance of the facility. To study the effects of this kind of phase perturbation on the near-field uniformities and far-field focusing abilities, a calculation model which is based on fast Fourier transform （FFT） theory and optics wavefront data of SG-II is established. The potential dangerousness which derives from the laser propagation to the facility is discussed.

关 键 词：激光光学 高功率激光 KDP晶体 周期性调制 

分 类 号：O436[机械工程—光学工程]