拉曼放大器的基本原理及其在有线电视光纤网长距离传输中的应用  

Theory and Application of RFA at Long-Distant Optical Fiber CATV Network Signal Transmission

作　　者：沈兵虎[1] 叶福昌 

机构地区：[1]浙江传媒学院,浙江杭州310018 [2]杭州艾可森电子有限公司,浙江杭州310019

出　　处：《中国有线电视》2007年第22期2065-2068,共4页China Digital Cable TV

摘　　要：当前在残留边带调幅（AM-VSB）调制的外调制光纤有线电视系统中,为实现长距离传输普遍采用大功率掺铒光纤放大器（EDFA）,而大的入纤光功率在光纤的色散作用下存在严重的非线性失真,根据受激拉曼散射原理,提出分布式光纤拉曼放大器（DFRA）在长距离信号传输中的应用对改善组合二阶失真（CSO）起到明显的效果,并与EDFA对比实验验证了其结果。In the CATV system with AM - VSB external modulation optical fiber transmission, High output level EDFA is usually adopted. But the high level optical signal input will cause severe non-linear distortion because of the dispersion effect. According to Raman dispersion theory, this thesis concludes that the DFRA brings obvious improvement to the CSO index in long-distant signal transmission. It also compares the effects between DFRA and EDFA and gets the same result.

关 键 词：光纤放大器(EDFA) 分布式光纤拉曼放大器(DFRA) 组合二次失真(CSO) 

分 类 号：TN722[电子电信—电路与系统] TN943.6