基于10 Gb/s NRZ信号的全光四倍频时钟提取实验研究  

All-optical Multiplication Clock Extraction from NRZ Signal

作　　者：周竹雅[1] 江阳[1] 徐静[1] 李恒文[1] 王顺艳[1] 

机构地区：[1]贵州大学理学院贵州省光电子技术与应用重点实验室,贵州贵阳550025

出　　处：《贵州大学学报（自然科学版）》2011年第6期8-12,共5页Journal of Guizhou University:Natural Sciences

基　　金：贵州省优秀青年科技人才专项基金((2009)09);贵州省优秀科技教育人才省长基金((2009)98);贵州省国际科技合作项目((2009)700102)

摘　　要：提出了一种从非归零(NRZ)码信号提取四倍频时钟的全光技术方案,并进行了实验验证。由于NRZ信号中没有时钟分量,因此首先利用半导体光放大器(SOA)中的非线性效应配合带通滤波器产生伪归零(PRZ)码信号,并通过光纤中的自相位调制产生高阶时钟分量,最后注入F-P滤波器得到四倍频的光时钟信号。实验演示中,从一路10 Gb/s的NRZ码出发,得到了40 GHz光时钟信号,波形和频谱均显示出良好的时钟信号质量。实验中,还同时验证了SOA对时钟信号的整形效果。A scheme of a NRZ all-optical multiplication clock extraction was proposed and experimentally verifled. As a result of the absence of the clock component in the NRZ modulation spectrum, firstly the non-linear effects in a semiconductor optical amplifier （SOA） combined with bandpass filter were used to produce pseudoRZ （PRZ） signal , and self-phase modulation in optical fiber were utilized to generate higher order clock components. Finally, the signal was injected into a Fabry-Perot filter to recover the optical clock signal with multiplication factor of four. In the experimental demonstration, a 40GHz optical clock signal was generated from a 10Gb/s NRZ data stream. Both waveform and spectrum show the signal with good quality. In addition, the effect of clock signal shaping by using a SOA was also verified experimentally.

关 键 词：时钟提取 F-P滤波器 自相位调制 半导体光放大器 

分 类 号：O438[机械工程—光学工程]