同向与反向抽运光纤喇曼放大器的阈值比较  

Comparison of threshold between forward-pumped and backward-pumped fibre Raman amplifier

作　　者：龙青云[1] 吴庭万[2] 胡素梅[3] 张秋晶[1] 

机构地区：[1]广东石油化工学院计算机与电子信息学院,广东茂名525000 [2]华南理工大学理学院,广州510640 [3]广东石油化工学院理学院,广东茂名525000

出　　处：《激光杂志》2014年第4期3-4,共2页Laser Journal

基　　金：2013广东省自然科学基金项目(s2013010012844);2013年度茂名市工农业科技计划项目(201318)

摘　　要：为分析同向抽运与反向抽运光纤喇曼放大器的阈值特性,基于已有的耦合微分方程,采用龙格库塔算法和打靶算法,数值模拟同向抽运和反向抽运光纤喇曼放大器中信号光功率沿光纤的演变过程,在此基础上根据实际情况推导出同向与反向抽运光纤喇曼放大器的阈值公式,这些公式比文献中的阈值公式更全面。然后,详细分析各个参数对同向抽运和反向抽运光纤喇曼放大器阈值特性的影响,并且对两种抽运方式的阈值进行比较,结果表明,各参量对同向和反向抽运FRA的阈值影响有相同的地方,也有不同的地方。相同参数时,反向抽运光纤喇曼放大器的阈值都大于同向抽运光纤喇曼放大器的值。结论对于光纤喇曼放大器的优化设计和实验有指导作用,为进一步的研究提供有益的参考。In order to analyze the threshold characteristics of forward-pumped and backward-pumped fibre Raman amplifier （FRA） , signal power distribution along a fibre with shooting method and Runge-Kutta method of the coupling equations of for- ward-pumped and backward-pumped FRA was provided. Then, the theoretical expressions of forward-pumped and backward-pumped FRA＇ s threshold which are more accurate are obtained with considering the practical factors, and the effects of every parameter on threshold of forward-pumped and backward-pumped FRA have been detailedly investigated. The threshold of two pumping ways are compared. The threshold of backward -pumped FRA is higher with same parameter. The conclusions are helpful to the study of fibre Raman amolifier.

关 键 词：光纤通信 光纤喇曼放大器 阈值 同向抽运 反向抽运 数值模拟 受激喇曼散射 

分 类 号：TN929.11[电子电信—通信与信息系统]