WDM光网络中拓扑结构对同频串扰积累的影响  

Impact of network topology on the accumulation of homodyne crosstalk in WDM optical networks

作　　者：宋彤宇[1] 张汉一[1] 郭奕理[1] 郑小平[1] 

机构地区：[1]清华大学电子工程系,北京100084

出　　处：《清华大学学报（自然科学版）》2003年第1期43-46,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(69990540);国家重点基础研究资助项目(G2000036604);清华-Bell光网络系统联合实验室基金

摘　　要：采用统计方法研究了波分复用(WDM)光网络中网络拓扑对同频串扰积累的影响。网络拓扑用两个参数描述:网络中节点数和网络连接度。在WDM光网络中,同频串扰由光交叉连接节点/光上下路节点(OXC/OADM)中非理想的光开关和复用器/解复用器引入,是使信号质量恶化的主要原因之一。结果表明:对于给定的网络规模,存在一个最佳的网络连接度可使同频串扰的积累最小,从而降低对光器件的要求。The impact of network topology on the accumulation of homodyne crosstalk in wavelength divison multiplexing (WDM) optical networks was statistically studied. The network topologies were described by the number of nodes in the network and the physical connectivity. The homodyne crosstalk, one of the major signal quality degradation factor, was induced by nonideal optical switches and multiplexer/demultiplexer pairs. The results show that a given network size has an optimum physical connectivity which minimizes the accumulation of homodyne crosstalk. Therefore, the network can be optimized to relax the stringent requirements posed on optical components in optical networks.

关 键 词：WDM光网络 波分复用 光交叉连接 光上下路节点 同源串扰 网络拓扑结构 节点数 网络连接度 

分 类 号：TN915.63[电子电信—通信与信息系统]