利用非线性光纤环镜160Gb/s到10Gb/s解时分复用  

Demultiplexing from 160 Gb/s to 10 Gb/s Using Nonlinear Optical Loop Mirror

作　　者：杨彦甫[1] 娄采云[1] 赵晓凡[1] 高以智[1] 章恩耀[1] 

机构地区：[1]清华大学电子工程系清华信息科学与技术国家实验室(筹)集成光电子学国家联合重点实验室,北京100084

出　　处：《光学学报》2009年第3期611-616,共6页Acta Optica Sinica

基　　金：国家自然科学基金(60577033;60736036);国家863计划(2009AA01Z256)资助课题

摘　　要：研究了160 Gb/s光时分复用(OTDM)系统的解复用技术。针对160 Gb/s速率的特点,对高非线性光纤(HNLF)的光纤环镜(NOLM)特性及解复用进行了数值仿真。计算了低信号光时间抖动下解复用误码特性对时钟与信号的走离及时钟功率的依赖关系。计算了三种走离值消光比随时钟功率增加的变化趋势并给出:存在一个能获得最大的解复用窗口消光比、并能降低相邻信道串扰的合适的时钟功率范围。利用自制的基于电吸收调制器和压缩技术的超短光脉冲源建立了160 Gb/s OTDM实验系统,测量了不同信号光功率下NOLM的消光比,它基本不随信号增大而变化,在信号功率为7.3 dBm时仍大于23 dB。利用上述装置实现了无误码的160 Gb/s到10 Gb/s全光解复用。All-optical demultiplexing of 10-Gb/s base-rate channels out of 160 Gb/s optical time-division-multiplexed （OTDM） data streams is demonstrated. The demultiplexer in 160 Gb/s OTDM system utilizes a highly nonlinear optical loop mirror（NOLM）. The relation of bit-error-rate （BER） of a demultiplexing versus walk-off and clock power at different timing jitter of date signals is calculated. The extinction ratio of demultiplexing window versus clock power at different walk-off is investigated. There is a proper clock power range, which can achieve the maximal extinction ratio of demultiplexing and lower crosstalk of adjacent channels. Based on the developed ultra-short optical pulse source, the 160 Gb/s OTDM experimental system is demonstrated. For different signal powers, the extinction ratio changes little with signal power. When the data signal power is 7.3 dBm, the extinction ratio of window is over 23 dB. The time-division demultiplexing from 160 Gb/s to 10 Gb/s is achieved with error-free with nonlinear optical loop mirror structure including highly nonlinear fiber.

关 键 词：光通信 光时分复用 160 Gb/s解时分复用 非线性光纤环镜 交叉相位调制 

分 类 号：TN929.11[电子电信—通信与信息系统]