强激光上行大气传输热晕效应导致的光束偏折研究  

Analysis of beam deviation induced by thermal blooming effect when high-energy laser propagating up in atmosphere

作　　者：张建柱[1] 张飞舟[1] 苏华[1] 胡鹏[1] 谢晓钢[1] 罗文[1] Zhang Jian-Zhu;Zhang Fei-Zhou;Su Hua;Hu Peng;Xie Xiao-Gang;Luo Wen(Institute of Applied Physics and Computational Mathematics,Beijing 100094,China)

机构地区：[1]北京应用物理与计算数学研究所,北京100094

出　　处：《物理学报》2021年第24期122-128,共7页Acta Physica Sinica

摘　　要：从激光大气传输热晕效应理论出发,提出了热畸变参数矢量模型概念,基于热畸变参数矢量模型,通过激光系统仿真软件EasyLaser,对激光上行远距离大气传输场景下光束偏折大小、偏折方向随矢量热畸变参数的变化规律进行了研究,结果表明,采用热晕效应热畸变参数矢量模型,光束偏折大小与矢量热畸变参数的模呈近线性增长,偏折方向与矢量热畸变参数的方向相反.基于光束偏折与矢量热畸变参数的规律,通过对光束传输路径上大气环境参数进行准实时测量,可为激光系统实际应用中光束偏置的预评估提供手段.Based on the thermal blooming effect theory for high-energy laser propagating in atmosphere,the vector model concept of thermal distortion parameter N_(D) is put forward.Based on the vector model concept of thermal distortion parameter and the laser system simulation software EasyLaser,the scaling law between the centroid offset of laser beam farfield and the vector thermal distortion parameter is simulated and analyzed.The simulation results indicate that the centroid offset quantity is in direct proportion to the modulus of vector thermal distortion parameter N_(D),and the centroid offset direction is opposite to the direction of vector thermal distortion parameter N_(D).Based on the scaling law,by real-time measuring the atmosphreic parameters on laser beam propagation path,the beam deviation of laser system can be conveniently estimated in practical application.

关 键 词：热晕效应 光束偏折 热畸变参数 矢量模型 

分 类 号：O24[理学—计算数学]