大能量中空光束大气传输的仿真与实验比对研究

摘要

To study the characteristics of high energy pulse laser propagating through turbulent atmosphere , the propagation of high energy laser in atmosphere was numerically simulated , and the far-field beam quantity in terms of the power in the bucket was compared with the experiment performed by using an Nd ∶glass laser at output of 800J.The error between the numerical simulation and experiment was analyzed in detail .The numerical simulation and experiments were studied under different conditions of visibility , output energy , and turbulence .It is shown that the numerical simulation can be used to predict the experimental results by a suitable choice of structure parameters of the phase screen .The results show the significance to guide the application and development of high energy pulse lasers .%为了研究高能脉冲激光大气传输特性，采用桶中功率和光斑半径作为远场光束质量评价标准，与800J钕玻璃激光器的实验结果进行了比较，仿真计算和实验中分别考虑了不同能见度、出射光能量和湍流强度下远场光斑半径的变化趋势；对数值模拟与实验结果分别进行了分析和比对，并对两者之间的误差做了详细分析。结果表明，数值模拟可用于预测实验结果，且对高能脉冲激光在大气中的应用和高能激光器的研制有指导意义。