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基于反向抽运方式的光纤拉曼放大器(FRA)的非线性耦合方程,采用数值计算的方法首次系统研究了单抽运多信号传输的FRA系统中各因素——光纤偏振模色散(PMD)、抽运光输入功率、抽运光波长、信号光输入功率、光纤长度及光纤损耗系数等对由抽运-信号拉曼相互作用所产生的偏振相关增益(PDG)的影响;比较了单抽运多信号FRA系统与单抽运单信号FRA系统中由抽运-信号拉曼相互作用所产生的PDG的大小;总结了各参数对降低由抽运-信号拉曼相互作用所产生的PDG的效果。研究结果表明,单抽运多信号FRA系统中的PDG主要由抽运-信号拉曼相互作用产生,并且光纤的PMD值和抽运光功率对PDG的影响较明显。
Based on the nonlinear coupling equation of the fiber-optic Raman amplifier (FRA) based on the anti-pump mode, the factors of the fiber-optic polarization mode dispersion (PMD) in the FRA system with single-pumping and multi-signal transmission are studied for the first time by means of numerical calculation. , The influence of the input power of pumping light, the wavelength of pumping light, the input power of signal light, the length of fiber and the loss factor of fiber on the polarization-dependent gain (PDG) generated by the pump-signal Raman interaction were compared. The size of the PDG generated by the pump-signal Raman interaction in a multi-signal FRA system and a single-pump single-signal FRA system; the effect of each parameter on reducing the PDG produced by the pump-signal Raman interaction is summarized . The results show that the PDG in single-pumping multi-signal FRA system is mainly generated by the pump-signal Raman interaction, and the influence of PMD value and pumping power of fiber on PDG is obvious.