中国激光, 2014, 41 (9): 0905008, 网络出版: 2014-07-22   

反向多抽运光纤拉曼放大器偏振相关增益研究

Study on Polarization Dependent Gain of Fiber Raman Amplifiers with Backward Multiple Pumps
作者单位
合肥工业大学仪器科学与光电工程学院, 安徽 合肥 230009
摘要
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系统研究了反向多抽运FRA中的偏振相关增益(PDG),其中包括FRA系统中由所有光波拉曼相互作用所产生的PDG、由抽运信号拉曼相互作用所产生的PDG、由抽运抽运拉曼相互作用所产生的PDG以及由信号信号拉曼相互作用所产生的PDG。研究结果表明,相比于单抽运FRA系统,多抽运FRA系统不仅可以获得较平坦的拉曼增益谱而且可以使整个增益带宽内的PDG较均匀。此研究不仅可以有效地估计反向多抽运FRA系统中分别由抽运信号、抽运抽运、信号信号之间拉曼相互作用所产生的PDG,而且对有效降低FRA系统中的PDG提供重要的参考价值。
Abstract
The polarization dependent gain (PDG) of fiber Raman amplifiers (FRAs) with backward multiple pumps is investigated systematically, by numerical method based on the nonlinear coupled equations describing the properties of fiber Raman amplifiers. The PDGs induced by all waves Raman interaction, by pump-signal Raman interaction, by pump-pump Raman interaction and by signal-signal Raman interaction are studied respectively. The results show that compared to the FRAs with single pump, the FRAs with multiple pumps can obtain not only flat gains but also uniform PDGs. This study can be used to estimate the PDGs of a FRA with backward pumps induced by pump-signal Raman interaction, pump-pump Raman interaction and signal-signal Raman interaction. These results are useful and important for reducing the PDG of a FRA.
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王丹燕, 姜海明, 谢康. 反向多抽运光纤拉曼放大器偏振相关增益研究[J]. 中国激光, 2014, 41(9): 0905008. Wang Danyan, Jiang Haiming, Xie Kang. Study on Polarization Dependent Gain of Fiber Raman Amplifiers with Backward Multiple Pumps[J]. Chinese Journal of Lasers, 2014, 41(9): 0905008.

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