高功率激光系统中的小尺度自聚焦研究  

Study of Small-Scale Self-Focusing in High-Power Laser System

作　　者：陈宝算[1] 张军勇[1] 张艳丽[1] 刘德安[1] 朱健强[1] 

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

出　　处：《激光与光电子学进展》2012年第1期8-22,共15页Laser & Optoelectronics Progress

基　　金：科技部国际合作项目(2010DFB70490)资助课题

摘　　要：概述了高功率激光系统中小尺度自聚焦产生的机理及相应的评价标准和分析方法,重点对激光经过钕玻璃介质和频率转换晶体的小尺度自聚焦情况进行了分析和讨论,同时介绍了两种测量小尺度调制增长的方法。针对高功率激光系统,阐述了抑制小尺度自聚焦的几种方法,提出通过控制小尺度调制增量,减少高功率激光的非线性效应对光学元件损伤的方案。指出了聚变级高功率激光技术中非线性效应研究的发展趋势。The cause, criterion and research method of small-scale self-focusing on high-power laser systems are reviewed. Small-scale self-focusing of lasers in Nd：glass and frequency-conversion crystal are analyzed and discussed. Moreover, measurement of small-scale modulation growth is introduced. Then methods to suppress small-scale selffocusing are also presented, and damage of high-power lasers to optical components is reduced by controlling smallscale modulation growth. Finally, the future research in nonlinear effects of fused high-power laser technology is proposed.

关 键 词：物理光学 小尺度自聚焦 B积分 高功率激光系统 

分 类 号：O436.3[机械工程—光学工程]