结构参数对串联微环谐振腔编解码器性能的影响  

Study of structure parameters effect on performance of optical en/decoder based on parallel-cascaded microring resonators

作　　者：吉喆[1] 贾大功[1] 张红霞[1] 张德龙[1] 刘铁根[1] 张以谟[1] 

机构地区：[1]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》2015年第3期382-389,共8页Acta Physica Sinica

基　　金：国家重点基础研究发展计划(973计划)(批准号:2014CB340103);国家自然科学基金(批准号:61377077;61404119)资助的课题~~

摘　　要：光码分多址系统中,光编解码器是影响系统性能的关键因素之一.自相关峰值旁瓣比(P/W)、自互相关峰值比(P/C)是衡量编解码器性能的两个重要指标.以硅基SOI微环谐振腔为载体,提出了一种串联三环阵列的二维相干OCDMA编解码器模型.详细研究了耦合系数、损耗系数、阵列间距以及通道间隔对微环谐振腔编解码器性能的影响.结果表明,半径为50μm的微环,环与直波导间耦合系数在0.6—0.7之间,环与环间耦合系数在0.1—0.2之间,损耗系数<2 d B/cm,阵列间距大于3 mm,通道间隔在25—36 GHz间时,编解码器能够获得良好的性能.Optical en/decoder is one of the most crucial factors affecting the performance of the optical code division multiple access（OCDMA）. The autocorrelation peak to maximum wing ratio（P/W） and cross-correlation ratio（P/C） are two important parameters to quantitatively evaluate the performance of the en/decoder.Based on the SOI parallel-cascaded coupled micro-ring reflector, a mathematical model of two-dimensional coherent optical en/decoder is established. Influences of the structure parameters including the coupling coefficient, the loss factor, the array distance, and the channel spacing on P/W and P/C ratios are discussed in detail. Results show that for the micro-ring with a radius of 50 μm,when the ring-bus and ring-ring coupling coefficients are 0.6—0.7 and 0.1—0.2, respectively, the propagation loss is lower than 2 d B/cm, the array distance is greater than 3 mm, and when the channel spacing is given between 25—36 GHz,the proposed structure can have an optimal performance of en/decoding.

关 键 词：光码分多址编解码器 自相关峰值旁瓣比 互相关峰值比 微环谐振腔 

分 类 号：TN76[电子电信—电路与系统]