谐振微环对MZI型interleaver滤波特性改善的分析  

Analysis of improvement of MZI type interleaver filter based on microring resonator

作　　者：张振宇[1] 裴丽[1] 赵瑞峰[1] 

机构地区：[1]北京交通大学光波技术研究所全光网与现代通信网教育部重点实验室,北京100044

出　　处：《红外与激光工程》2011年第3期525-528,543,共5页Infrared and Laser Engineering

基　　金：国家自然科学基金资助项目(60771008;60837002);北京市自然科学基金资助项目(4082024);留学回国人员基金资助项目(教外司留[2008]890号);教育部博士点基金资助项目(200800040002)

摘　　要：作为新兴的群组滤波技术,interleaver技术与传统的DWDM技术相结合,可以在不增加新光纤及器件技术难度的基础上使原有DWDM系统的复用波长数增加一倍。耦合一个谐振微环到光纤熔锥型非平衡马赫-曾德尔干涉仪型波长交错滤波器系统中,利用微环的相位引入改善交错滤波器的响应函数,选择适当的微环耦合角,使其带通平坦性和阻带抑制比得到改善,理论优化阻带抑制(>40 dB)能得到明显加强。分析微环周长(Lr)与马赫-曾德尔干涉臂差(△L)的关系,指出:波长交错滤波器奇偶输出带宽分配比直接取决于Lr/△L,当Lr/△L=2时,可以实现1:1对称带宽分配特性的交错滤波器;当Lr/△L=0.5时,可以实现1:2非对称带宽分配特性的交错滤波器;最终得到灵活的带宽分配交错滤波器。As new groups filter technology,interleaver technique combined with traditional DWDM technology can double the multiplexing wavelength in DWDM systems without increasing new optical devices and technical complexities.Coupling a microring resonator to a system of fused fiber unbalanced Mach-Zehnder interferometer type interleaver filter,the band-pass flatness and stop-band rejection ratio were improved by introducing the phase of microring to improve the response function of the filter and optimizing the coupling angle of microring.Stop-band suppression（40 dB） can be significantly optimized theoretically.The influences of microring perimeter（Lr） on length difference（△L） of MZI arms were investigated.The result demonstrates that the bandwidth allocation ratio of odd-even outputs is directly determined by Lr/△L.A novel interleaver filter with 1：2 asymmetric bandwidth allocation can be achieved by adjusting Lr/△L=0.5,while another interleaver filter with 1：1 symmetric bandwidth allocation can be achieved by adjusting Lr/△L=2.Finally,flexible bandwidth allocation crisscross filter is obtained.

关 键 词：INTERLEAVER 微环 马赫-曾德尔干涉仪 

分 类 号：TN929.11[电子电信—通信与信息系统]