大口径拼接压缩光栅波像差研究  

Study on wave aberration of large-aperture mosaic compression grating

作　　者：魏江[1] 吴建宏[2] 

机构地区：[1]常熟理工学院物理与电子工程学院,常熟215500 [2]苏州大学信息光学工程研究所,苏州2150061

出　　处：《激光技术》2014年第2期225-229,共5页Laser Technology

基　　金：国家自然科学基金资助项目(61178046);江苏省高校自然科学研究重大基础研究资助项目(11KJA140001)

摘　　要：为了研究大口径拼接压缩光栅的固定像差和随机像差对光学拼接的影响,采用数值模拟的方法,理论分析了参考光栅的衍射光斑特性。在有效判据的基础上,得到了光栅的拼接精度。结果表明,当拼接子光栅的波像差为1.0λ时,其最大拼缝偏差约为0.26个光栅周期,采取人工干预后,最大拼缝偏差增加到0.42个光栅周期。与此同时,最大角度偏差约为0.71μrad,两种特性参量均比无像差时的拼接要求大幅度降低。这一结果对高能量皮秒激光装置的改进有一定的积极意义。In order to analyze the effects of fixed and random wave aberration on the large-aperture mosaic compression gratings , by numerical simulation , the far-field characteristics for referenced gratings were studied .On the basis of the precise evaluation criterion , the tiling accuracy of the mosaic gratings was obtained .The results showed that the maximum piston error of the tiling precision was about 0.26 grating period when the wave aberration of sub-gratings was 1.0λ.After manual intervention, the maximum piston error was about 0.42 grating period and the maximum tip-tilt error was 0.71μrad approximately, which were both lower than before .The research is benefit for the improvement of high energy picosecond laser device .

关 键 词：激光光学 拼接光栅 波像差 远场衍射 拼缝偏差 角度偏差 

分 类 号：TN253[电子电信—物理电子学]