平顶光谱响应的光学交叉复用滤波器

提出了一种设计光学交叉复用滤波器interleaver的新结构。该结构采用具有环形波导的单级MZ干涉仪设计而成。比较3级、5级及7级interleaver的功率透射谱发现，级次越高平顶效果越好；同时通带和阻带越陡，越接近方波。结果表明，只要给出期望得到的这种结构的椭圆半谱带滤波器交叉口的传递函数．便可以得到相应的设计参数；随着级数的增加其功率透射谱具有接近方波的平顶效果，适宜设计interleaver。

A Novel Interleaver with Flat-top Spectral Response

This paper proposed a novel method to design Interleaver,which was implemented by single stage M-Z interferometer with ring waveguides.Compare the power transmittances among the third grade interleaver,the fifth grade interleaver and the seventh grade interleaver,it is found that with the grade of interleaver adding flat-top effect is better,the steeper spectral responses of the stopband and passband are achieved,and power transmittances get close to square wave.The merits of the design is that if only the transfer function of desired cross port for elliptic half-band filter is determined,circuit parameters can be gained and flat-top spectral response and power transmittance closing to square wave are achieved by adding the grade of interleaver.