高斯光束是激光学中最普遍的光束，需要设置参数得到所需要的高斯光束，该程序可以通过调节参数得到所需要的高斯光束。-Gaussian beam is a basic and common beam in laser. In general, you need to set the parameters　to obtain the Gaussian beam. The program can give the desired Gaussian beam by adjusting the parameters.