文章提出一种基于环形谐振腔和Sagnac环的光学交错滤波器，该滤波器是在常规Sagnac环的腔内耦合一个具有单偏振特性的环形谐振腔而构成的。利用环形谐振腔的非线性相位特性来改变偏振光的相位延迟特性，从而实现了具有近似矩形结构的偏振无关的光学交错滤波光谱。

This paper presents an optical interleaver that is based on a ring resonator and a Sagnac loop, which is constructed by coupling a ring resonator with single polarization properties in the conventional Sagnac loop. The phase latency property of the polarization light is changed by using the nonlinear phase property of the ring resonator, thus realizing a polarization-independent optical interleaver with approximate rectangular structure.