激光钠信标光斑漂移和光斑半径的数值模拟与分析

激光钠信标的光斑漂移、光斑半径的变化对自适应光学校正有直接的影响。在激光钠信标光斑漂移方差和有效半径理论模型的基础上，采用数值模拟的方法，在三种大气湍流模式下，具体研究了激光钠信标光斑与激光光斑漂移方差和有效半径的差异，计算了不同发射口径时激光钠信标光斑的长曝光与短曝光有效半径的平均值，分析了有再泵浦能量激光对激发钠信标光斑漂移方差和平均有效半径的影响。研究结果表明，大气湍流强度、激光发射口径以及再泵浦激光能量都能够影响激光钠信标光斑漂移和光斑半径。

Numerical Simulation and Analysis of Beam Wander and Spot Radius for Sodium Laser Beacon

The beam wander and spot radius of Sodium Laser Beacon (SLB) have direct effects on correction of adaptive optics. Based on wander variance and effective radius model of SLB, the differences in these aspects between SLB and laser are studied under the three atmospheric turbulence models by the numerical simulation method. Then, the average effective radius of SLB spot for the long-exposure and short-exposure is calculated for different laser launch diameters. Effects of laser with repumping power on beam wander and spot radius of SLB are analyzed. Results show that the strength of atmospheric turbulence, laser launch diameters and the repumping power have influence on beam wander and spot radius of SLB.