激光大气传输模拟程序CLAP及其应用

Code for Laser Atmospheric Propagation and its Applications

基于已有的工作基础,利用高效的科学计算语言FORTRAN95,开发完善了一套实用化的激光大气传输模拟程序.该程序基于光场传播的抛物型方程和多层相位屏技术,实现了激光大气传输的湍流效应、热晕效应以及湍流和热晕相互作用等的数值模拟.通过内置的4种激光大气传输路径以及10种光学湍流廓线等,可以在多种传输模式下对圆形、环形和方形等光束的传输过程和效应参数进行仿真计算,光传播的实时过程利用OpenGL技术能够三维动态显示.模拟软件的用户界面友好,计算参数设置方便,可以有效地为自由空间光通信、激光雷达探测以及随机介质中的光传输研究等提供理论分析和性能预测.

On the basis of the existing researches and the highly effective computational language FORTRAN- 95, a practical computer program for simulating laser propagating in the atmosphere was developed. The program, based on the optical field＇s Maxwell equation and the multiple phase screen method, could numerically simulate the turbulence effects, thermal blooming and their mutual effects for laser atmospheric propagation. Four types of propagation paths and ten kinds of optical turbulence profiles are also included into the program, which make it possible to simulate the propagating process and the atmospheric effects for laser beam with a circular or rectangular aperture under currently available conditions. Moreover, the beam propagating process can be visualized simultaneously by utilizing open graphics library （OpenGL）. With the friendly user interface and convenient parameter settings, the program can be widely used for predicting and evaluating the propagation effects in the fields of free space laser communications, lidar detecting and beam propagation investigation in random media.