反向抽运光纤拉曼放大器偏振相关增益的数值计算

Study on the Polarization Dependent Gain of Backward Pumped FRA by Numerical Simulations

摘要:

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。

Abstract:

The relation between PDG due to pump-signal Raman interaction of backward pumped FRA and several important parameters, including polarization mode dispersion(PMD) of fiber, pump power, pump wavelength, signal power, fiber length, fiber loss, is investigated by numerical method. The influences of the parameters on degrading the PDG due to pump-signal Raman interaction of backward pumped FRA are discussed based on the numerical method results. And the results show that the PDG in backward pumped FRA degrades when the PMD of fiber and the length of fiber increase, and increases with the pump power and pump wavelength. Moreover, the results show that the signal power and the fiber loss have little influences on the PDG.