An improved OSNR monitoring method for PM-QPSK coherent systems

Wang Fang; Zhang Xia

doi:10.13756/j.gtxyj.2014.04.008

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An improved OSNR monitoring method for PM-QPSK coherent systems

- An improved OSNR monitoring method for PM-QPSK coherent systems
- Study on Optical communication Issue 4, Pages: 24-27(2014)
- 作者机构：
  
  1. 聊城大学网络信息中心
  2. 北京邮电大学信息光子学与光通信国家重点实验室
  3. 聊城大学山东省光通信科学与技术重点实验室
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2014.04.008
  CLC： TN929.1
- Published：2014，
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[1]王芳,张霞.PM-QPSK相干系统中改进的OSNR监测方法[J].光通信研究,2014(04):24-27.

Wang Fang, Zhang Xia. An improved OSNR monitoring method for PM-QPSK coherent systems. [J]. (4):24-27(2014)
[1]王芳,张霞.PM-QPSK相干系统中改进的OSNR监测方法[J].光通信研究,2014(04):24-27. DOI： 10.13756/j.gtxyj.2014.04.008.

Wang Fang, Zhang Xia. An improved OSNR monitoring method for PM-QPSK coherent systems. [J]. (4):24-27(2014) DOI： 10.13756/j.gtxyj.2014.04.008.

摘要

针对100Gbit/s及以上PM-QPSK（偏振复用正交相移键控）相干光通信系统

提出了一种改进的基于统计矩的带内OSNR（光信噪比）监测方案

并在搭建的100Gbit/s PM-QPSK相干接收系统中对该方案进行了数值仿真。结果表明

在5

5dB的OSNR范围内

该改进方案对不同占空比的RZ（归零）码调制信号的监测误差均小于0.5dB;根据商用相干接收机对接收端OSNR的要求

取其参考值为14dB

则在0.5dB的监测范围内

对CD（色散）的容忍度为2 400ps/nm

对一阶PMD（偏振模色散）即DGD（差分群时延）的容忍度为62ps。

Abstract

For 100Gbit/s（or above）Polarization Multiplexed-Quadrature Phase Shift Keying（PM-QPSK）optical coherent transmission systems

we propose an improved statistical moment-based intraband Optical-Signal-Noise-Ratio（OSNR）monitoring method and carry out its numerical simulation in such an established system.The results show that when this method is used

all the monitoring errors of RZ code modulated signals with different duty cycles are smaller than 0.5dB in the OSNR range of 5

5dB and in line with the requirement of the commercially available coherent receivers for the OSNR at the receiver end

taking the reference value of 14 dB

the system Chromatic Dispersion（CD）tolerance is 2 400ps/nm and that for the 1storder Polarization Mode Dispersion（PMD）

i.e.Differential Group Delay（DGD）

is 62ps/nm in the monitoring range of0.5dB.

关键词

光纤通信系统光信噪比监测偏振复用正交相移键控色散偏振模色散

Keywords

fiber-optic communication systemOSNR monitoringPM-QPSKCDPMD

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