级联EDFA光纤传输系统级间损耗的优化

OPTIMIZATION OF THE LINK LOSS IN THE TRANSMISSI0N SYSTEM WITH CASCADED EDFA'S

本文首先推导了给定传输距离条件下，单信道级联EDFA接收信噪比的一般表达式．分析表明，单信道情况下，EDFA的间隔越小，增益越低，信噪比越高．在此基础上，提出了“满足最小接收信噪比要求”的优化准则．对波分复用系统，我们提出了“使最小信噪比最大”的优化准则．实际模拟的结果证明了方法的可行性．采用此法可同时使信这间信噪比差别达到最小．

In this paper,we deeply investigated the signal-to-noise-ratio (SNR)of the single channeland multi-wavelength channel transmissi0n with many cascaded EDFA's. Method for determining theoptimal link loss between EDFA's are proposed f0r the first time t0 the auth0r's knowledge.