激光在大气传输时会受到大气湍流等因素的影响, 导致光束质量下降, 影响激光作用效能。针对功率谱反演法产生的相位屏在低频部分表现不足的情况, 利用H-V模型对白天和夜晚条件下的激光大气湍流效应进行建模, 采用Zernike算法来构造大气湍流相位屏。仿真结果与Kolmogonov 统计规律符合, 结果显示Zernike算法可以对低频部分很好模拟, 随着阶数的提高, 高频部分也能较好体现。针对美国ABL系统和ATL系统参数对强激光束的大气传输湍流。畸变波前进行仿真分析, 得出ATL系统湍流相位屏最大PV值约为3.5λ, ABL系统湍流相位屏最大PV值约为7.5λ。研究结果能够对强激光自适应光学系统的技术指标分析提供指导。

Laser transmission in the atmosphere is influenced by the atmospheric turbulence and other factors, which may degrade the laser beam quality and the operational effect of the laser.The low spatial frequency part usually deviates significantly from theoretic value generated by power spectrum method.To solve the problem, we used H-V model to establish the model of atmospheric turbulence effects on laser at day and nigh, and the algorithm of Zernike to generate the phase screen of atmospheric turbulence.The result of simulation of atmospheric turbulence meets the Kolmogonov statistics law.The result shows that low-frequency part of atmospheric turbulence can be well reflected by the algorithm of Zernike, and the high-frequency part can also be reflected finely with the increasing of order of Zernike.The system parameters of ABL and ATL of USA were used to simulate the distorted wavefront of high-power lasers atmospheric propagation.The result shows that the maximal P-V value of turbulent phase screen of ATL is about 3.5λ, and is about 7.5λ for the ABL system, which may provide a reference to the design of the adaptive optic system for high-power lasers.