相位屏法 仿真大气湍流 以及拉盖尔高斯光束传播的光强的相位仿真-Phase screen method Simulation of atmospheric turbulence Light intensity simulation Laguerre-Gaussian beam propagation phase of

利用角谱传播理论，计算光束传播很远距离后的分布情况，即远场分布-Use angular spectrum propagation theory to calculate the distribution of the beam propagation after a very long distance, that far-field distribution