Dynamical phase alignment of sampling clock in optical performance monitoring system  

作　　者：杨爱英 刘超超 冯立辉 

机构地区：[1]School of Opto-electronics,Beijing Institute of Technology

出　　处：《Chinese Optics Letters》2015年第1期37-40,共4页中国光学快报（英文版）

基　　金：financially supported by the National 863 Program of China(No.2013AA013401);the National Natural Science Foundation of China(Nos.61177067,61027007,and 61331010)

摘　　要：In an optical performance monitoring system for high-speed optical communications, the ultra-short optical pulse from the laser is divided into two parts. One is to sample high-speed optical communication signal and the other as the sampling clock in an analog/digital converter （ADC） after detecting using a photon-detector. We propose a simple method based on variance calculation to align the phase of sampling clock in an ADC. The experiments demonstrate that, with the proposed method, the eye diagram or constellation diagram of high-speed optical communication signal can be reconstructed by the optical performance monitoring system.In an optical performance monitoring system for high-speed optical communications, the ultra-short optical pulse from the laser is divided into two parts. One is to sample high-speed optical communication signal and the other as the sampling clock in an analog/digital converter （ADC） after detecting using a photon-detector. We propose a simple method based on variance calculation to align the phase of sampling clock in an ADC. The experiments demonstrate that, with the proposed method, the eye diagram or constellation diagram of high-speed optical communication signal can be reconstructed by the optical performance monitoring system.

关 键 词：Clocks MONITORING PHOTONS 

分 类 号：TN929.1[电子电信—通信与信息系统]