基于自适应光学的机载激光光束质量校正算法研究  

Study on Algorithm of Beam Quality Correction of Airborne Laser Based on Adaptive Optics

作　　者：王秋实 张亦卓[1] 顾海栋 WANG Qiushi;ZHANG Yizhuo;GU Haidong(AVIC Manufacturing Technology Institute,Beijing 100024,China;Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国航空制造技术研究院,北京100024 [2]中国科学院高能物理研究所,北京100049

出　　处：《航空制造技术》2018年第16期80-84,101,共6页Aeronautical Manufacturing Technology

基　　金：航空基金支持项目(2016ZC25002);陆军装备部航空装备局装备预先研究基金支持项目(30104031004)

摘　　要：机载激光受大气光学效应影响较为明显,研究以自适应光学为代表的光束整形系统,将有效提高激光器作用于目标位置的光束质量。利用光路中的自适应光学变形镜,以能量反馈方式对机载激光发射单元出射的激光光束质量进行回路校正,是一种可行方案。采用以随机并行梯度下降法(SPGD法)为代表的优化算法作用于变形镜,实现返回光能量最大,从而实现目标上的光束质量提升。通过算法优化及全局收敛仿真,探求一种较快速收敛的实用性方法,用于连续激光和重复性好的脉冲激光的光束质量校正。上述算法的仿真研究,有助于机载条件下的激光在实际大气环境下的效能提升,具有一定的实用价值。irborne laser is infuencedbyatmosphericopticalefectobviously.Thus it isuseful tostudy the beam shaping system represented by adaptive optics,which would efectively improve the beam quality of laser at the target position. It is a feasible solution to use an adaptive mirror in the optical path by energy feedback,to calibrate the laser beamquality emitted by the airborne laser unit.An optimization algorithm,represented by the Stochastic Parallel Gradient Descent method,SPGD method,was applied in the adaptive mirror.It realized the maximum energy of return light,so as to improve the beam quality on the target.By optimizing SPGD algorithm and simulating a global convergence,a practical method of rapid convergence was proposed for beam quality correction of continuous laser and reproducible pulse laser.The simulation of the above algorithm is helpful to improve the prformance of laser under an airborne condition ,which would have a certain pactical value.

关 键 词：机载激光 大气光学 自适应光学 SPGD法 光束整形 

分 类 号：O439[机械工程—光学工程] V243[理学—光学]