激光传输光束抖动效应的数值模拟

Numerical simulation of jittering effect of laser beams propagation

为了在激光大气传输四维数值模拟中考虑激光光束抖动带来的影响,推导了光束抖动倾斜角与Zernike多项式低阶项系数之间的关系,提出了一种激光传输光束抖动效应的数值模拟方法。为验证该数值模拟方法的正确性,针对均匀聚焦光束,计算了大气湍流与抖动效应综合作用下长期光束扩展角半径,数值模拟计算结果与理论公式计算结果基本一致,验证了激光传输抖动效应数值模拟方法的正确性。

In the 4D numerical simulation of laser atmosphere propagation, for considering the effect of laser beams jittering, the relation was discussed between jittering angle of laser and low order coefficient Zernike polynomial. A simulation method of laser beams jittering was given. For proving the correctness of the method, the beam expansion angular radius was calculated with atmosphere turbulence and jittering effect. It is basal consistent with the result of numerical simulation and theory, the all validate that the method is effective.