计算光纤模量的MatLab源码，需要输入折射率，芯径比，模式等参数。-Calculation of fiber modulus MatLab source code, need to enter the refractive index, core diameter ratio, the mode parameter.

该MATLAB程序计算长周期光纤光栅纤芯模式的有效折射率-MATLAB program calculated the long-period fiber grating core mode effective refractive index