基于三环辅助Mach-Zehnder干涉仪的带宽可调滤波器设计  

Design of a Reconfigurable Optical Filter Based on Triple-ring-assisted Mach-Zenhnder Interferometer with Large Bandwidth Tuning Capability

作　　者：蒋佳 耿敏明[1,2,3,4] 刘嫱 张振荣 JIANG Jia;GENG Minming;LIU Qiang;ZHANG Zhenrong(School of Computer,Electronics and Information,Guangxi University,Nanning 530004,China;Guangxi Key Laboratory of Multimedia Communications and Network Technology,Guangxi University,Nanning 530004,China;Key Laboratory of Multimedia Communications and Information Processing of Guangxi Higher Education Institutes,Guangxi University,Nanning 530004,China;Guangxi Experiment Center of Information Science,Guilin Guangxi 541004,China)

机构地区：[1]广西大学计算机与电子信息学院,南宁530004 [2]广西多媒体通信与网络技术重点实验室,南宁530004 [3]广西大学广西高校多媒体通信与信息处理重点实验室,南宁530004 [4]广西信息科学实验中心,广西桂林541004

出　　处：《光子学报》2021年第7期275-284,共10页Acta Photonica Sinica

基　　金：National Natural Science Foundation of China(Nos.61965003,61741504,61661004);Guangxi Science Foundation(No.2018GXNSFAA294133)。

摘　　要：设计了一种基于绝缘体上硅的具有大带宽调谐能力的紧凑型可重构光滤波器。该装置由三个微环辅助马赫-曾德尔干涉仪构成,利用硅的热光效应可以控制微环谐振器的相位,进而同时调节滤波器的带宽和中心波长。用时域有限差分法对器件的性能进行了仿真,仿真结果表明,带宽的调谐范围为1.4~10.6 nm,占自由光谱范围的11.5%~85%;阻带消光比大于20 dB,通带损耗为0.4~0.7 dB,器件尺寸为40μm×60μm。A compact reconfigurable optical filter based on silicon-on-insulator with large bandwidth tuning capability is designed in this paper.The device is based on triple-ring-assisted Mach-Zehnder interferometer.The bandwidth and center wavelength of the device can be tuned at the same time by reasonably changing the phases of the microring resonators through the thermo-optic effect of silicon.The performance of the proposed device is simulated by finite difference time domain method.The simulation results show that the tuning range of the bandwidth is 1.4 nm to 10.6 nm,which accounts for 11.5%to 85%of the free spectrum range.The stopband extinction ratio is greater than 20 dB,and the passband loss is 0.4 dB to 0.7 dB,the footprint of the device is about 40μm×60μm.

关 键 词：光滤波器 硅基 马赫-曾德尔干涉仪 微环谐振器 带宽可调 

分 类 号：TN256[电子电信—物理电子学]