论文部分内容阅读
基于光纤拉曼放大器(FRA)的非线性耦合方程,采用数值计算的方法首次系统分析了双向多泵浦FRA系统中的偏振相关增益(PDG)特性。根据4个泵浦光源配置的不同,FRA有14种结构。首先整体分析了这14种不同FRA结构中PDG的特点;然后对其中一种结构FRA系统中PDG的特性进行了更具体的分析,包括泵浦-信号、泵浦-泵浦以及信号-信号拉曼相互作用所产生的PDG。研究结果表明,当泵浦总数目一定时,反向泵浦数目越多,其PDG均值越小;当泵浦总数目和反向泵浦数目都一定时,PDG的大小与反向泵浦光波长关系不大;双向多泵浦FRA系统中的PDG主要由泵浦-信号拉曼相互作用所产生的PDG决定。以上结果对有效降低双向多泵浦FRA系统中的PDG有重要的参考价值。
Based on the nonlinear coupling equation of fiber Raman amplifier (FRA), the polarization dependent gain (PDG) characteristics of a bidirectional multi-pumped FRA system are systematically analyzed for the first time by means of numerical calculation. Depending on the configuration of the four pump light sources, FRA has 14 configurations. First of all, the characteristics of PDG in these 14 different FRA structures are analyzed as a whole. Then, the characteristics of PDG in FRA system with one of these structures are analyzed more specifically, including pump-signal, pump-pump and signal- Mann’s interaction produces PDG. The results show that when the total number of pumps is constant, the more the number of reverse pumps, the smaller the average PDG. When the total number of pumps and the number of reverse pumps are both constant, The relationship between wavelength and wavelength is not significant. The PDG in a bidirectional multi-pumped FRA system is mainly determined by the PDG generated by the pump-signal Raman interaction. The above results have important reference value for effectively reducing the PDG in bidirectional multi-pumped FRA system.