一种具有光隔离功能的光纤梳状滤波器的理论分析

Theoretical analysis of fiber comb-filter with optical isolation

提出了一种由取样光栅与光纤方向耦合器组合而成 ,具有多个波长选择功能和光隔离的光纤光栅反射梳状滤波器的理论模型 ,由传输矩阵法推导出了该模型输入光和输出光之间关系数学表达式 ,对决定滤波器输出光谱特性及光隔离功能的有关参量及其规律进行了详细讨论和数学仿真 ,给出了同时实现光梳状滤波和光隔离功能的模型结构的理论参数 。

A theoretical model of comb filter with fiber grating is proposed. The model composed of sampling fiber grating and fiber directional couple has the function of multi wavelengths chosen and optical isolation. The mathematical formulation of the relationship between the lights input and output is educed from the method of transformation matrix. The parameters and rules which decide spectra characteristic of the filter output and the function of optical isolation are discussed in detail and emulated.The structure parameters on the model which realize pectination filtering and optical isolation simultaneously is given. Its result can provide reference for later facture of this device and solution to key technology.