光栅取样远场监测系统精度分析  

Precision Analysis of New Far-Field Alignment System Using Grating Sampling

作　　者：高妍琦[1] 刘代中[1] 朱宝强[1] 丁莉[1] 彭增云[1] 林尊琪[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：《中国激光》2009年第5期1086-1090,共5页Chinese Journal of Lasers

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

摘　　要：光束自动准直系统是高功率激光惯性约束聚变装置的重要子系统,激光远场监测技术是光束自动准直系统的关键技术,基于光栅取样的新型远场临测系统可以利用光栅衍射灵活取样激光远场。对影响光栅取样系统远场监测精度的主要因素进行了分析,结果表明,系统误差为小孔直径的7.49%,包括投影误差和斜成像误差;随机误差小于小孔直径的1%,包括物像关系误差和衍射光耦合误差。Beam automatic alignment system is an important sub-system used in high power laser inertial confinement facility for beam adjustment. Far-field alignment is a key technique of the automatic alignment system. Based on the character of diffraction grating, the new far-field alignment system can sample far-field flexibly. The main factors that affect the precision of the far-field detection system are analyzed. The result shows that the systemic error which includes projection error and aslant imaging error is 7.49% of the spatial filter pinhole, and stochastic error which includes object-image error and diffraction light suited error is less than 1% of the pinhole.

关 键 词：激光技术 光束准直 光栅取样 远场准直 

分 类 号：TN242[电子电信—物理电子学]