非Kolmogorov湍流中激光光斑漂移的统计模拟  

Statistical Simulation of Laser Spot Drift in Non-Kolmogorov Turbulence

作　　者：赵明华 齐德全 

机构地区：[1]长春理工大学数学与统计学院,吉林 长春

出　　处：《应用数学进展》2024年第2期661-671,共11页Advances in Applied Mathematics

摘　　要：激光光束在湍流大气传输过程中光斑位置发生漂移,从而影响目标跟踪、激光通信等应用。本文采用功率谱反演法和低频补偿法构建等效结构常数的非Kolmogorov湍流随机相位屏,模拟高斯光束在非Kolmogorov湍流传输过程,对产生的光斑漂移量进行研究,提出了基于贝叶斯定理的光斑漂移估计模型。实验结果表明:漂移量估计精度随湍流强度和传输距离的增大而减小。光斑后验模型相较于移动平均模型的平均绝对误差小,估计精度较高。The spot position of the laser beam drifts during turbulent atmospheric transmission, which affects the application of target tracking and laser communication. In this paper, the power spectrum in-version method and the low-frequency compensation method are used to construct a non-Kolmogorov turbulent stochastic phase screen with equivalent structural constants, which simulates the turbulent transmission process of Gaussian beams in non-Kolmogorov flows, and the resulting spot drift is studied, and a spot drift estimation model based on Bayes’ theorem is pro-posed. The experimental results show that the accuracy of drift estimation decreases with the in-crease of turbulence intensity and propagation distance. Compared with the moving average model, the average absolute error of the spot posterior model is smaller, and the estimation accuracy is higher.

关 键 词：非kolmogorov湍流 相位屏 贝叶斯定理 光斑漂移 

分 类 号：TN2[电子电信—物理电子学]