北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2000, Vol. 23 ›› Issue (4): 1-5.

• 学术论文 •    下一篇

OADM中同频串扰的数值模拟

程振杰, 余重秀, 徐大雄   

  1. 北京邮电大学电子工程学院,北京 100876
  • 收稿日期:2000-06-01 出版日期:2000-12-10
  • 作者简介: 程振杰(1972—),女,河北廊坊人,博士生.
  • 基金资助:
    国家教育部高等学校博士学科点专项科研基金资助项目;国家“863计划”“中国高速信息示范网”资助项目(863-300-05-03-02)

Numerical Simulation of Intraband Crosstalk in OADM

CHENG Zhen-jie, YU Chong-xiu, XU Da-xiong   

  1. Electronic Engineering School,Beijing University of posts and Telecommunications,Beijing 100876,China
  • Received:2000-06-01 Online:2000-12-10
  • Supported by:
     

摘要: 串扰是波分复用光网络中限制光分插复用器容量的一个重要因素.文中分析了相干和非相干串扰对通过OADM节点的光信号的影响,给出了固定和最佳判决门限两种情况下的光功率恶化,并仿真模拟了串扰引入的功率恶化随复用波长数、解复用器隔离度和节点下路波长数的变化情况,结果表明相干串扰对系统的影响很大.与固定判决相比,采用最佳判决可以降低串扰影响.另外采用滤波器也可以抑制串扰.

关键词: 波分复用, 光分插复用器, 相干串扰, 非相干串扰, 固定判决门限, 最佳判决门限

Abstract: The crosstalk is an important limiting factor in optical wavelength division multiplexing (WDM) networks.The impact of coherent and incoherent crosstalk on an optical signal passing through a typical OADM architecture is studied.We give the analytical power penalty expressions for both fixed decision-threshold (FDT) and optimum decision-threshold(ODT).Through calculation,the coherent crosstalk is found to be the most important limitation in the OADM.Compared with FDT,ODT will tolerate more crosstalk contributions.On the other hand,the power penalty will be decreased when the number of dropping wavelength increases or the crosstalk value of DMUX decreases.The DMUX/MUX filters and ODT receiuer are used for less requirements of total crosstalk specification for components.The increase of the DMUX performance is the best way of suppressing crosstalk.

Key words: wavelength division multiplexing(WDM), optical add-drop multiplexer(OADM), coherent crosstalk, incoherent crosstalk, fixed decision-threshold(FDT), optimum decision-threshold(ODT).

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