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对 15 0 0nm波段光CATV噪声的产生的机制进行了讨论。重点分析了EDFA产生的噪声特性 ,对系统载噪比(CNR)与EDFA输入功率之间的关系和系统CNR与调制指数的关系进行了研究 ,得出了提高CNR的方案 ;对光CATV组网方案进行了讨论 ,给出了一个光CATV网络设计的实例
The mechanism of CATV noise generation in the 150 nm band is discussed. The noise characteristics of EDFA are analyzed. The relationship between CNR and EDFA input power and the relationship between system CNR and modulation index are studied, and the solution to improve CNR is obtained. The optical CATV network The scheme was discussed and an example of a CATV network design was given