基于同轴照明和光栅取样的激光束准直远场监测系统  

Far-Field Detection System of Laser Beams Alignment Based on Gratings Sampling and On-Axial Illumination

作　　者：刘代中[1] 丁莉[2] 高妍琦[1] 朱宝强[1] 朱俭[1] 彭增云[1] 朱健强[1] 俞立钧[2] 

机构地区：[1]中国科学院上海光学精密机械研究所高功率装置物理联合实验室,上海201800 [2]上海大学机械制造及自动化学院,上海200072

出　　处：《中国激光》2009年第5期1101-1104,共4页Chinese Journal of Lasers

基　　金：国家863计划(2007SQ804);中日韩激光聚变高能最拼度物理合作研究资助课题

摘　　要：利用高功率激光装置中间滤波器小孔成像和取样光栅的衍射,结合插入的负透镜发散激光来同轴照明小孔,设计出一套新型光路远场监测方案。该方案利用光栅衍射可以灵活取样激光远场,并且在实验平台上进行了实验验证。实验结果表明,共远场监测系统的准直精度达到小孔直径的1.42%,能够满足准直系统远场调整精度(小于小孔直径5%)的要求。Utilizing the image of spatial filter＇s pinhole of high power laser systems and diffraction of sample grating, with an insertable negative lens for the pinhole＇s on-axial illumination, a new system for far-field detection of laser beam is presented. This far-field detection system, which is fully demonstrated on the experimental system, can fully use space through off-axial grating sampling. The experimental results indicate, that the average far-field alignment error is less than 1.42 % of spatial filter pinhole diameter, which meets the alignment system requirements （5 % of spatial filter pinhole diameter）.

关 键 词：激光技术 光束准直 光栅 远场 

分 类 号：TN247[电子电信—物理电子学]