NRZ码全光帧头识别器研究  

An All Optical Header Recognition for NRZ

作　　者：王亚平[1] 吴重庆[1] 王雪[1] 张煦[1] 赵阳[1] 

机构地区：[1]北京交通大学发光与光信息技术教育部重点实验室光信息科学与技术研究所,北京100044

出　　处：《光子学报》2009年第4期853-857,共5页Acta Photonica Sinica

基　　金：国家自然科学基金(60577020;60672004)资助

摘　　要：提出了一种基于太赫兹非对称光解复用器结构的NRZ码全光帧头识别方案.通过注入辅助的连续光,解决了信号在SOA中的竞争,实现三态到两态的转换.对40Gb/s信号的数值分析表明,这种方案可获得消光比为13.29dB的判决识别信号输出.对非线性相移差偏离的影响进行了分析,结果表明如果限制非线性相移差的偏离小于0.1rad,仍然可获得消光比13dB以上的判决识别信号输出.对2.5Gb/s帧头信号的判决实验表明,理论分析结果与实验相符.Based on improved TOAD and introducing DC assistant light which solves two groups signals to compete in SOA and realizes transformations from three condition to two condition, a novel scheme to implement header recognition for NRZ was proposed. Simulation results shows that this program can get 13.29 dB extinction ratio（ER） of the output at 40Gb/s with common SOA. The analysis of impact of nonlinear phase shift difference departure from π and 2π in actual system shows that when a fluctuant rang of nonlinear phase shift difference is confined within 0. 1 rad, and 13 dB extinction ratio of recognition signal is still obtained with assistant light injection. Therefor the demander of debugging is degraded greatly. Its validity is confirmed through experiments at 2.5 Gb/s. The experimental result is agree with the theoretic analysis. Further more,the influencing factors to the ER of recognition signal was researched in experimentatlly.

关 键 词：全光网 全光帧头识别器 全光比较器 太赫兹非对称光解复用器 

分 类 号：TN929.11[电子电信—通信与信息系统]