激光传输大气湍流效应复域仿真模拟方法研究  

Complex domain simulation and modeling method for atmospheric turbulence effect of laser transmission

作　　者：赵建彤 刘智[2] 姚海峰 蒋青芳 杨亚欣 ZHAO Jian-tong;LIU Zhi;YAO Hai-feng;JIANG Qing-fang;YANG Ya-xin(School of Electronic and Information Engineering,Changchun University of Science and Technology,Changchun 130022,China;NUERC of Space and Optoelectronics Technology,Changchun University of Science and Technology,Changchun 130022,China;School of Optics and Photonics,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]长春理工大学电子信息工程学院,吉林长春130022 [2]长春理工大学空间光电技术国家地方联合工程研究中心,吉林长春130022 [3]北京理工大学光电学院,北京100081

出　　处：《激光与红外》2024年第6期878-884,共7页Laser & Infrared

基　　金：国家自然科学基金叶企孙科学基金项目(No.U2141231);国家自然科学青年科学基金项目(No.62105029);中国博士后科学基金项目(No.2021TQ0035,No.2021M700415);应用光学国家重点实验室基金项目(No.SKLA02022001A11)资助。

摘　　要：针对光场所受到的湍流畸变影响,提出了一种模拟激光传输大气湍流效应的新方法,利用大气湍流效应的统计学特性,实现了激光传输大气湍流效应在幅度域和相位域两个维度的联合模拟,且该方法适用于弱、中、强三种湍流情况。基于可描述不同湍流强度下光场幅度畸变的两种统计模型,采用随机微分方法得到光波幅度变化序列,光波幅度变化序列模拟结果与理论计算结果在不同湍流强度下均较好地吻合,拟合系数均大于0.9767;基于低频次谐波补偿的功率谱反演方法,采用三阶贝塞尔函数随机曲线设计生成时变相位屏对大气湍流效应中的相位畸变进行模拟。在不同湍流强度下,采用高斯光束作为光源,通过对时变相位屏移动过程中接收光斑强度进行归一化统计,模拟结果表明,所构建的大气湍流效应复域仿真模型模拟的效果与实际大气湍流畸变过程吻合。Aiming at the effect of turbulent distortion on the optical field,a new method to simulate the atmospheric turbulence effect of laser transmission is proposed,which realizes the joint simulation of the atmospheric turbulence effect of laser transmission in two dimensions,the amplitude domain and the phase domain,by using the statistical properties of the atmospheric turbulence effect,and the method is applicable to weak,moderate and strong turbulence cases.Based on the two statistical models that can describe the optical field amplitude aberration under different turbulence intensities,the stochastic differentiation method is used to obtain the optical wave amplitude change sequence,and the simulation results of the optical wave amplitude change sequence match well with the theoretical calculations under different turbulence intensities,and the fitting coefficients are all greater than 0.9767.A power spectrum inversion method based on low frequency harmonic compensation is utilized to generate a time varying phase screen using a third order Bessel function stochastic curve design to simulate phase aberrations in atmospheric turbulence effects.Under different turbulence intensities,a Gaussian beam is used as the light source,and the simulation results show that the simulated effects of the constructed complex domain simulation model of atmospheric turbulence effects coincide with the actual atmospheric turbulence aberration process through the normalized statistics of the intensity of the received spot during the moving process of the time varying phase screen.

关 键 词：激光传输 大气湍流 复域仿真 幅度畸变 相位畸变 

分 类 号：TN929.12[电子电信—通信与信息系统] O436[电子电信—信息与通信工程]