Phase shift monitoring of delay-line interferometer and its application in phase-shift keying signal system  

作　　者：闻和 廖金鑫 郑小平 张汉一 郭奕理 

机构地区：[1]State Key Laboratory on Integrated Optoelectronics/Tsinghua National Laboratory for Information Science and Technology,Department of Electronic Engineering,Tsinghua University

出　　处：《Chinese Optics Letters》2012年第7期3-7,共5页中国光学快报（英文版）

基　　金：supported in part by the National Natural Science Foundation of China(Nos. 61007045,61025004 and 61032005);the National "863" Program of China(Nos.2009AA01Z223 and 2009AA01Z253)

摘　　要：The relation between the phase shift and the mean optical power （MOP） output from a delay-line inter- ferometer （DLI） port applied for phase-shift keying （PSK） signal demodulation is proven of a cosine law irrelevant to signal modulation condition. The variation amplitude of the MOP is proportional to the transition duration of the modulation pulses. This phenomenon is interpreted as the result of the sta- tistical and waveform characteristics of the PSK. The conclusions verified by simulation and experiment are generalized to other modulation formats and then applied to phase detuning monitoring, delay time judgment of DLI, and independence of modulation data assessment.The relation between the phase shift and the mean optical power （MOP） output from a delay-line inter- ferometer （DLI） port applied for phase-shift keying （PSK） signal demodulation is proven of a cosine law irrelevant to signal modulation condition. The variation amplitude of the MOP is proportional to the transition duration of the modulation pulses. This phenomenon is interpreted as the result of the sta- tistical and waveform characteristics of the PSK. The conclusions verified by simulation and experiment are generalized to other modulation formats and then applied to phase detuning monitoring, delay time judgment of DLI, and independence of modulation data assessment.

关 键 词：INTERFEROMETERS MODULATION Phase shifters Signal systems 

分 类 号：TN911.3[电子电信—通信与信息系统]