中文说明：
Brag.m：均匀布拉格光栅MATLAB反射谱仿真
MachZehnde_interferometer.m：分析耦合比及臂长差的改变对马赫-曾德尔干涉仪输出特性的影响
OADM.m：关于基于马赫-曾德尔干涉仪与光纤光栅的OADM。
English Description：
Bragg. M: MATLAB reflection spectrum simulation of uniform Bragg grating < / P > < p > machzehnde_ M: analysis of the influence of coupling ratio and arm length difference on the output characteristics of Mach Zehnder interferometer < / P > < p > OADM. M: About OADM based on Mach Zehnder interferometer and fiber grating.