作　　者： ; ;

机构地区： 北京邮电大学电子工程学院

出　　处： 《北京邮电大学学报》 2000年第4期1-5,共5页

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 . 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.

关 键 词： 波分复用 数值模拟 同频串扰 光纤通信

领　　域： [电子电信] [电子电信]