基于光纤四波混频DPSK系统相位噪声提取检测和抑制  

Phase noise reduction of DPSK signals based on four-wave mixing in a fiber

作　　者：周振[1] 徐铭[1] 蒲骁[1] 

机构地区：[1]深圳大学信息工程学院通信工程系,广东深圳518060

出　　处：《量子电子学报》2011年第1期115-121,共7页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金(60772027;JC200903120022A)资助项目

摘　　要：差分相移键控(DPSK)在长距离光纤通信系统中有高接收机灵敏度、高频谱效率以及抗非线性效应方面的优势,最近受到广泛关注。在DPSK通信系统中,线性相位噪声和非线性相位噪声是影响系统性能的主要因素。研究了如何利用光纤四波混频(FWM)效应来监测和抑制相位噪声,降低相位噪声对DPSK通信系统的影响。结果表明利用光纤FWM效应产物可以检测相位噪声值,并且基于光纤饱和FWM效应全光限幅器可以有效地降低非线性相位噪声,提高了DPSK系统性能。该结果对研究高速全光通信有重要意义。Differential phase-shift keying （DPSK） format gained more attention for long-haul optical fiber communication systems, due to its advantages of improvement in receiver sensitivity, high spectral efficiency and robustness to nonlinear effects. Phase noise and nonlinear phase noise are the main factors impacting the performance of DPSK system. Phase noise is monitored and reduced by four-wave mixing （FWM） in a fiber experimentally. The results show that the products of FWM can monitor the value of phase noise, DPSK signals performance can be improved by a amplitude limiter in a fiber based on saturation FWM through reducing nonlinear phase noise. This result is very important for high-speed all optical communication

关 键 词：非线性光学 相位噪声 差分相移键控 非线性相位噪声 

分 类 号：TN929.11[电子电信—通信与信息系统]