【摘要】 对双向抽运拉曼光纤放大器 (RFA)的噪声特性、增益饱和及抽运功率转换效率进行了详细研究。结果表明 ,双向抽运拉曼光纤放大器的噪声特性介于前向抽运与后向抽运之间 ,但主要取决于前向抽运方式所导致的噪声特性 ;双向抽运方式的饱和功率低于单向抽运方式的饱和功率 ,同前向抽运与后向抽运提供的增益比例有关 ;双向抽运方式的抽运功率转换效率同信号光功率及前、后向抽运提供的增益有关 ,当信号光功率较低时 ,增加前向抽运的比例可取得较高的抽运功率转换效率 ,而信号光功率较高时 ,增加后向抽运的比例可取得较高的抽运功率转换效率。研究一种配置 (情况 3)的双向抽运拉曼光纤放大器 ,可以完全补偿 10 0km传输线路的损耗 (包括无源器件的损耗 ) ,最低光信噪比为 30 .2 1dB。更多还原

【Abstract】 The noise, gain saturation and pump power conversation efficiency of bidirectionally pumped Raman fiber amplifier (RFA) are investigated in detail. The results show that the noise feature of bidirectionally pumped RFA is intermediate between one of the forward and backward pumped RFA, but it is mainly determined by the noise feature of forward pumped RFA. The saturation power of bidirectionally pumped RFA is related to the ratio of gain provided by forward and backward pumping. The pump power conversion efficiency is related to signal power and the ratio of gain provided by forward and backward pumping. The pumps deployment of case 3 studied here can compensate nearly the loss of 100 km link, which includes the loss of inactive components, and the lowest optical signal-to-noise ratio (OSNR) is 30.21 dB.更多还原