基于光线光学的强激光非线性效应仿真与分析  

Simulation and analysis of nonlinear effect of intense laser based on ray optics

作　　者：李涛[1] 张莹 LI Tao;ZHANG Ying(Yinchuan University of Energy,Yinchuan 750100,China)

机构地区：[1]银川能源学院,银川750100

出　　处：《激光杂志》2023年第5期252-256,共5页Laser Journal

基　　金：宁夏回族自治区自然科学基金资助项目(No.2020AAC03033)。

摘　　要：非线性效应会影响强激光系统的性能,为了改善强激光系统的光束质量,基于光线光学提出了强激光非线性效应仿真与分析研究。利用光线光学透镜的相位传递函数,得到透镜的总厚度,根据光线光学透镜的结构参数,构建了光线光学透镜的传递函数模型,基于极化强度与光电场的关系,计算出光传输介质的总折射率,在线性折射率远大于非线性折射率的情况下,计算出强激光非线性折射率,结合强激光非线性效应响应函数,仿真分析了强激光的非线性效应。仿真结果表明,当光束功率密度为2.5*10^(8)W/cm^(2)和0.75*10^(10)W/cm^(2)时,强激光的非线性效应都比较弱,从而改善了光束的质量。Nonlinear effect will affect the performance of high-power laser system.In order to improve the beam quality of high-power laser system,the simulation and analysis of high-power laser nonlinear effect are proposed based on ray optics.Using the phase transfer function of the optical lens,the total thickness of the lens is obtained.Accord-ing to the structural parameters of the optical lens,the transfer function model of the optical lens is constructed.Based on the relationship between the polarization intensity and the photoelectric field,the total refractive index of the optical transmission medium is calculated.When the linear refractive index is much greater than the nonlinear refractive in-dex,the nonlinear refractive index of the strong laser is calculated.Combined with the response function of the nonlin-ear effect of the strong laser,the nonlinear effect of intense laser is simulated and analyzed.The simulation results show that when the beam power density is 2.5*10^(8)W/cm^(2)and 0.75*10^(10)W/cm^(2),the nonlinear effect of strong laser is relatively weak,which improves the beam quality.

关 键 词：强激光系统 传递函数 折射率 光线光学 非线性效应 响应函数 

分 类 号：TN241[电子电信—物理电子学]