激光大气传输热晕与光束抖动综合效应的数值模拟

研究了激光大气传输中热晕与光束抖动综合效应的数值模拟方法。一般情况下采用统计方法模拟光束抖动，当光束抖动频率远小于或远大于热晕特征频率时，用卷积的方法计算热晕与光束抖动综合作用下的光束远场光斑的光强分布。为了检验数值模拟方法的正确性，针对聚焦Gauss光束，计算了热晕与光束抖动综合作用下，焦平面上的光强分布。计算结果与经验公式的计算结果符合得很好，验证了数值模拟方法的正确性。

Numerical Simulation of the Combined Effect of Jittering and Thermal Blooming of Laser Beams Propagating in the Atmosphere

In this paper,the method to simulate the combined effect of jittering and thermal blooming of laser beams propagating in the atmosphere is discussed.If the jitter frequency is much less or much bigger than the thermal blooming frequency,the convolution method is used to simulate the combined effect of jittering and thermal blooming,otherwise Monte Carlo method is used to simulate the combined effect of jittering and thermal blooming.The far-field parameters of the focused Gauss beam propagating in the atmosphere are calculated out.The results agree well with those obtained from empirical expression.