VDM+EDFA系统中光纤非线性效应影响的研究

Studies on the Influence of the Fiber Nonlinear-Effects in WDM+EDFA Systems

系统分析了光纤非线性效应对光纤主干网 WDM+EDFA扩容的影响。在信道间隔相等的条件下 ,得出了光纤非线性响应影响下的阈值功率、信道数、信道间隔和 EDFA级联数等之间的关系。结果表明 ,在信道数和信道间隔不同时 ,FWM、XPM和 SRS分别起不同作用 ;为实现 WDM+EDFA技术 ,每个信道的输入功率必须小于一定值。

The influence of fiber nonlinear-effects on the capacity-expanding of the fiber backbone networks by the means of WDM+EDFA is systematically analyzed. The relationships among the threshold power, channel numbers, channel spacing and the cascaded EDFA numbers under the influence of fiber nonlinear-effects are obtained in condition with the equal spacing channel. The results show that FWM, XMP and SRS respectively take different effect under the different channel numbers and spacing;the input power of each channel must be less than a certain value to realize the WDM+EDFA technology.