【摘要】 指出了WDM光传送网中 ,级联光上下路节点或光交叉连接节点后 ,系统构成上与传统级联线路放大器情况下的差异以及常用光信噪比评估公式的近似性。对WDM光传送网中线路给出了一个等效模型 ,并详细推导了光信噪比的计算公式 ,同时计入了光放大器的自发辐射噪声引起的饱和效应。最后针对不同系统配置情况进行了光信噪比的估算 ,分析了估算结果及其对线路设计的指导意义更多还原

【Abstract】 The system difference between the link of cascaded line-amplifiers and the link of cascaded optical add-drop-module (OADM)/optical cross-connection (OXC) nodes is pointed out. A new formula to estimate the optical signal-to-noise ratio (OSNR) for the link with cascaded OADM/OXC nodes in all-optical network (AON) is presented. Based on the formula, a set of OSNR results is given. The analysis and numerical result show that the OSNR formula for link with cascaded line-amplifiers, which is widely used in engineering designing, could not be applied directly in AON design without correction.更多还原