利用太赫兹光非对称解复用器对归零伪随机码占空比压缩的全光速率倍增  

All-Optical Repetition Rate Multiplication of Return to Zero Pseudorandom Bit Sequences Using Duty Ratio Compressor Based on Terahertz Optical Asymmetrical Demultiplexer

作　　者：孙振超[1] 王智(指导)[1] 吴重庆[1] 王甫[1] 李强[1] 

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

出　　处：《中国激光》2016年第4期124-129,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金(61275075,61378061,61571035);北京市自然科学基金(4144080,4132035)

摘　　要：利用太赫兹非对称解复用器(TOAD)对伪随机比特序列(PRBS)归零(RZ)码占空比压缩后经多路延迟叠加来实现速率倍增。实验上将周期为2~7-1、速率为2.5 Gb/s的伪随机RZ码占空比由50%压缩至12.5%后经4路精确延时叠加,保持码型不变,速率提升4倍至10 Gb/s,相对于原伪随机码,保证误码率10^(-9)的功率代价为2 dB。A scheme for all-optical repetition rate multiplication of return to zero（RZ） pseudorandom bit sequences（PRBS） is demonstrated with a duty ratio compressor based on terahertz optical asymmetrical demultiplexer（TOAD） cascaded multichannel delay structure.Its feasibility is verified experimentally,which shows that the duty ratio of RZ PRBS with the period of 2~7-1 is compressed from 50%to 12.5%and than the bit rate is promoted from2.5 Gb/s to 10 Gb/s with the same code type by the four-channel precise delay.The power penalty for bit error rate less than 10^（-9） of the eventual PRBS is 2 dB compared with the orignal PRBS.

关 键 词：光通信 信号处理 占空比压缩 速率倍增 太赫兹非对称解复用器 半导体光放大器 

分 类 号：TN247[电子电信—物理电子学]