一种用于通信C波段的光轨节点无源集成芯片  

A Novel Hybrid Integrated Passive Light-trails Node Chip for C Waveband Optical Communications

作　　者：平均芬[1] 胡劲华[2] 高国贤[1] 刘恺[2] 

机构地区：[1]浙江广播电视大学萧山学院,杭州311201 [2]浙江工业大学信息工程学院,杭州310023

出　　处：《光电工程》2014年第9期81-86,共6页Opto-Electronic Engineering

基　　金：浙江省教育厅科研项目(Y201223105)资助

摘　　要：光轨是一种新型光通信网络结构,具有交换粒度小、带宽利用率高等优点。本文提出一种应用于通信C波段的新型光轨节点无源集成芯片,支撑1 545 nm、1 550 nm和1 555 nm三个C波段波长的通信。该新型光轨节点无源集成芯片是一种基于SOI纳米波导材料的片上微器件系统,核心器件由基于微环谐振器的解复用器和基于马赫-泽德尔干涉仪的环加强型热光光开关构成。通过理论计算和软件仿真,分别分析了解复用器和光开关的光学和通信性能,结果显示微环解复用器3个波长信道的串扰分别为22.5 dB、16.9 dB和16.3 dB;光开关的消光比分别为16.6 dB、19.7 dB和21.5 dB;插入损耗分别为0.86 dB、0.85 dB和0.68 dB,功耗约为51 mW。Light-trail is a novel optical network and promises smaller switching granularity and better bandwidth utilization. A novel integrated LT node chip that supports 3 C waveband wavelengths for duplex communication is introduced. The light-trail node chip is developed in SOI platform with the optical circuits based on Si waveguide, and it is a kind of hybrid integrated positive optical components including MMI coupler, MUX/DEMUX based on the microring resonators and the optical switches based on Mach-Zehnder interferometer （MZI）. The two key devices on the light-trail node chip are the microring-based MUX/DEMUX and the optical switch. We theoretically analyzed and designed MUX/DEMUX based on the microring resonators, and the simulation results showed that MUX/DEMUX based on the microring resonators had lower crosstalk with 22.5 dB, 16.9 dB and 16.3 dB for 1 545 nm, 1 550 nm and 1 555 nm channels. We also designed an optical switch based on MZI with a microring resonator based on an interference arm. The thermo-optical effect was used to control the coupling between the microring and the straight waveguide （i.e. the interference arm） and then control ON/OFF of the optical switch. The simulation results showed that the switch had very low power consumption of 51 mW, and its extinction ratio were 16.6 dB, 19.7 dB and 21.5 dB for 1 545 nm, 1 550 nm and 1 555 nm wavelengths. In addition, the insertion losses of the optical switch were 0.86 dB, 0.85 dB and 0.68 dB for three optical cannels.

关 键 词：光轨网络 无源集成芯片 平面光波导 微环谐振器 热光效应 

分 类 号：TN929.11[电子电信—通信与信息系统]