激光技术
激光技術
격광기술
LASER TECHNOLOGY
2014年
2期
225-229
,共5页
激光光学%拼接光栅%波像差%远场衍射%拼缝偏差%角度偏差
激光光學%拼接光柵%波像差%遠場衍射%拼縫偏差%角度偏差
격광광학%병접광책%파상차%원장연사%병봉편차%각도편차
laser optics%tiling grating%wave aberration%far-field diffraction%piston error%tip-tilt error
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。
為瞭研究大口徑拼接壓縮光柵的固定像差和隨機像差對光學拼接的影響，採用數值模擬的方法，理論分析瞭參攷光柵的衍射光斑特性。在有效判據的基礎上，得到瞭光柵的拼接精度。結果錶明，噹拼接子光柵的波像差為1．0λ時，其最大拼縫偏差約為0．26箇光柵週期，採取人工榦預後，最大拼縫偏差增加到0．42箇光柵週期。與此同時，最大角度偏差約為0．71μrad，兩種特性參量均比無像差時的拼接要求大幅度降低。這一結果對高能量皮秒激光裝置的改進有一定的積極意義。
위료연구대구경병접압축광책적고정상차화수궤상차대광학병접적영향，채용수치모의적방법，이론분석료삼고광책적연사광반특성。재유효판거적기출상，득도료광책적병접정도。결과표명，당병접자광책적파상차위1．0λ시，기최대병봉편차약위0．26개광책주기，채취인공간예후，최대병봉편차증가도0．42개광책주기。여차동시，최대각도편차약위0．71μrad，량충특성삼량균비무상차시적병접요구대폭도강저。저일결과대고능량피초격광장치적개진유일정적적겁의의。
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 .
