Optical notch filter design based on digital signal processing  

作　　者：郭森 张娟 李雪 

机构地区：[1]Key Laboratory of Specialty Fiber Optics and Optical Access Networks,School of Communication and Information Engineering,Shanghai University

出　　处：《Optoelectronics Letters》2011年第3期182-185,共4页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.10804070);the Innovation Program of Shanghai Municipal Education Commission (No.09YZ06);Shanghai Leading Academic Discipline Project (No.S30108)

摘　　要：Based on digital signal processing theory,a novel method of designing optical notch filter is proposed for Mach-Zehnder interferometer with cascaded optical fiber rings coupled structure.The method is simple and effective,and it can be used to implement the designing of the optical notch filter which has arbitrary number of notch points in one free spectrum range(FSR).A design example of notch filter based on cascaded single-fiber-rings is given.On this basis,an improved cascaded double-fiber-rings structure is presented to eliminate the effect of phase shift caused by the single-fiber-ring structure.This new structure can improve the stability and applicability of system.The change of output intensity spectrum is finally investigated for each design parameter and the tuning characteristics of the notch filter are also discussed.

关 键 词：DESIGN Digital signal processing Fibers Optical fibers Optical resonators 

分 类 号：TN713[电子电信—电路与系统]