中文说明：模拟仿真几种LP模式在不同光纤传输常数下的光场分布，计算出光场中光斑的光强，且提供一种可调制其振幅的调制函数
English Description：
The light field distribution of several LP modes in different fiber transmission constants is simulated, the light intensity of the spot in the light field is calculated, and a modulation function which can modulate its amplitude is provided