强噪声下基于基因梯度粒子群算法的反馈波前调控方法  

Feedback Wavefront Manipulation Method Based on Genetic Gradient Particle Swarm Optimization Algorithm Under Strong Noise

作　　者：凌苹江 张寅瑞 田博宇 李恪宇[2] 孙年春[1] 张彬[1] Ling Pingjiang;Zhang Yanrui;Tian Boyu;Li Keyu;Sun Nianchun;Zhang Bin(School of Electronics and Information Engineering,Sichuan University,Chengdu,Sichuan 610064,China;Research Center of Laser Fusion,China Academy of Engineering Physics,Mianyang,Sichuan 621900,China)

机构地区：[1]四川大学电子信息学院,四川成都610064 [2]中国工程物理研究院激光聚变研究中心,四川绵阳621900

出　　处：《光学学报》2022年第6期214-223,共10页Acta Optica Sinica

基　　金：四川省科技计划(2018JY0553);中国科学院自适应光学重点实验室基金(LAOF1801)。

摘　　要：当激光束经过透明散射介质时,通常会产生散斑光场。利用反馈波前调控技术对入射光束的相位进行主动调控,可将散斑整形成聚焦光斑。当存在强噪声干扰时,已有的反馈控制算法大多存在调控效果不理想的问题,故提出一种适用于强噪声环境的基于基因梯度粒子群算法的反馈波前调控方法。该方法不过分依赖以往的优化信息,而是结合梯度快速搜索和基因交叉突变功能来实现噪声环境下对激光束的调控。通过与传统算法进行比较,分析基因梯度粒子群的初始参数(调整因子、变异率和交叉率等)和搜索能力对调控效果的影响。结果表明,在明亮室内的强背景杂散光噪声下,基因梯度粒子群算法能在较少的迭代次数下实现更好的聚焦效果。When a laser beam passes through a transparent scattering medium,a speckle field is usually generated.The phase of the incident beam can be adjusted proactively by using feedback wavefront control technique,and the speckle can be formed into focused speckle.When there is strong noise interference,most of the existing feedback control algorithms have the problem of unsatisfactory regulation effect.Therefore,a feedback wavefront regulation method based on genetic gradient particle swarm optimization algorithm is proposed for strong noise environment.This method does not rely too much on the previous optimization information,but combines the function of gradient rapid search and gene cross mutation to realize the laser beam regulation in noisy environment.The effects of initial parameters(adjustment factor,mutation rate,crossover rate,etc.)and search ability of gradient particle swarm optimization on regulation effect are analyzed by comparing with traditional algorithm.The results show that under the strong background stray light noise in the bright room,the genetic gradient particle swarm optimization algorithm can achieve better focusing effect in less iterations.

关 键 词：物理光学 基因梯度粒子群 反馈波前调控方法 相位补偿 散射成像 

分 类 号：O436.1[机械工程—光学工程]