基于串联哑铃型微环谐振腔的二维相干光码分多址编解码器  

Two-dimensional coherent optical en/decoder based on serially coupled dumbbell microring resonator

作　　者：吉喆 严英占[2] 贾大功[3] Ji Zhe;Yan Ying-Zhan;Jia Da-Gong(School of Mechanical Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;The 54 th Research Institute of CETC,Shijiazhuang 050081,China;Key Laboratory of Opto-electronics Information Technology,Ministry of Education,School of Precision Instrument and Opto-Electronics Engineering,Tianjin University,Tianjin 300072,China)

机构地区：[1]石家庄铁道大学机械工程学院,石家庄050043 [2]中国电子科技集团公司第五十四研究所,石家庄050081 [3]天津大学精密仪器与光电子工程学院,光电信息科学与技术教育部重点实验室,天津300072

出　　处：《物理学报》2022年第1期131-139,共9页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:2019B1-0171);河北省教育厅青年基金(批准号:QN2016182)资助课题。

摘　　要：利用微环谐振腔阵列进行光码分多址编解码过程中,微环谐振腔反射谱的自由频谱宽度(FSR)范围制约该系统用户容量的提升.本文提出了一种新型的基于游标效应的串联哑铃型微环谐振腔光编解码器.利用Matlab建立了半径分别为40μm-30μm-40μm的哑铃型微环谐振腔光编解码器模型.详细分析了光反射谱伪模抑制与耦合系数的关系,研究了耦合系数、码片速率对串联哑铃型微环谐振腔光编解码器性能的影响.结果表明,与半径分别为40μm-40μm-40μm的传统串联微环谐振腔编解码器相比,哑铃型微腔编解码器FSR值扩大了4倍.理想情况下,用户容量可呈指数增长.同时,互相关峰值比(P/W)与自相关峰值旁瓣比(P/C)分别提高了约33%和8%.Free spectral range(FSR) of reflection spectrum of micro-ring resonator restricts the improvement in user capacity of the optical code division multiple access(OCDMA) system using micro-ring resonator array. Vernier effects can expand FSR of cascaded optical microring resonator. Based on vernier effect, a novel twodimensional coherent optical en/decoder using serially coupled dumbbell micro-ring resonator is proposed in this paper. The theoretical model of optical transmission for series dumbbell-shaped microring resonators is established. The relation between the suppression of pseudo-modes in optical reflection spectrum and the coupling coefficient is analyzed in detail. The effects of coupling coefficient, processing error and chip rate on the performance of series dumbbell microring resonator optical en/decoder are studied. The en/decoding simulation experiments are carried out on a series dumbbell-shaped micro-ring resonator with radius of 40 μm-30 μm-40 μm respectively. The results show that comparing with the traditional series micro-ring resonator with radius of 40 μm-40 μm-40 μm respectively, the FSR value of dumbbell microcavity is increased by 4 times and the user capacity can increase exponentially. Meanwhile, the ratio of autocorrelation peak to maximum wing(P/W) and the cross-correlation ratio(P/C) are increased by about 33% and 8%, respectively.

关 键 词：微环谐振腔光编解码器 用户容量 自相关峰值旁瓣比 互相关峰值比 

分 类 号：TN929.1[电子电信—通信与信息系统]