基于非球面镜组的大口径激光匀化技术研究  

Large aperture laser shaping research based on aspheric homogenizer

作　　者：张浩[1] 樊红英[1] 赵琦[1] 蒋泽伟[1] 孟庆安[1] 欧阳刚 陈好 ZHANG Hao;FAN Hongying;ZHAO Qi;JIANG Zewei;MENG Qing’an;OUYANG Gang;CHEN Hao(Southwest Institute of Technical Physics,Chengdu 610041,China)

机构地区：[1]西南技术物理研究所,成都610041

出　　处：《激光技术》2023年第3期340-344,共5页Laser Technology

摘　　要：为了优化对大口径激光探测组件灵敏度、角度参数等特性的测量能力,减小因高斯光束光强分布中间强、边缘弱的特点造成的测量值差异,基于小口径非球面镜组光束整形及高倍率扩束技术,设计了大口径均匀激光光束产生装置,提出了基于光强分布、非球面镜非球面度、光线光程差的综合优化整形方法。结果表明,设计的开普勒型非球面整形镜组非球面度小于20μm,工作束宽5 mm,输出平顶光束均匀性为92.8%;设计的40^(×)高质量扩束系统,与非球面镜组相匹配可实现2 m距离内150 mm口径均匀光束,可获得优于94.2%的Ф150 mm大口径均匀光束输出。该研究对激光测量与标定系统的工程化设计是有帮助的。In order to optimize the measurement of the responsibility and angle parameters of the large-aperture laser detector,and to reduce the discrepancy generated from the central-peak weak-edge profile of gaussian beam,a large-aperture flat-top laser beam generator was designed based on aspheric lens shaping and high-magnification collimating systems.A comprehensive shaping technology based on intensity distribution,aspheric coefficients,and optical path difference was presented.The results show that the aspheric coefficient of a Kepler aspheric lenis less than 20μm,effective width is 5 mm,and the energy uniformity of the flat-top output beam is greater than 92.8%.And a 40^(×)high quality collimating system was designed to match the aspheric lens to realize a flat-top beam of 150 mm aperture in 2 m distance.The measurement results show that the energy uniformity of the 150 mm flat-top beam is greater than 94.2%.This research is helpful to the engineering design of laser measurement and calibration system.

关 键 词：激光技术 平顶光束 大口径光束整形 均匀性 非球面镜组 

分 类 号：TN249[电子电信—物理电子学]