Abstract

The paper presents the simulation results of a broadband fiber Raman amplifier with uniform gain band covering C+L telecommunication windows in the standard TrueWave RS fiber. Main advantages of the fiber amplifier with active medium based on the single-mode TrueWave RS type fiber were analyzed by comparing this amplifier with the erbium doped fiber amplifier. A simplified model for the analytical description of the ultrawideband fiber Raman amplifier with multiwave pumping has been proposed. In this study, the problem of simulating the uniform bandwidth of working frequencies of fiber Raman amplifier in (C+L)-band telecommunication windows is solved in two stages: first, we obtain an almost exact analytical approximation of the Raman gain profile in the frequency region of Stokes shift above 20 THz that at the second stage significantly simplifies the gain band equalization in configuration with multiple pumping wavelengths. It has been shown that the gain ripple can be dramatically reduced from more than 3 to 0.2 dB by increasing the number of pumping sources M from M = 2 to M = 6, however, further increase of M has almost no effect on the improvement of gain band irregularity.

中文翻译：

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在 C+L 电信窗口中使用具有均匀带宽的 TrueWave RS 有源光纤模拟拉曼放大器

摘要

本文介绍了在标准 TrueWave RS 光纤中覆盖 C+L 电信窗口的具有均匀增益带的宽带光纤拉曼放大器的仿真结果。通过与掺铒光纤放大器的比较，分析了基于单模TrueWave RS型光纤的有源介质光纤放大器的主要优点。提出了一种用于分析描述具有多波泵浦的超宽带光纤拉曼放大器的简化模型。在这项研究中，模拟光纤拉曼放大器在（C+L）波段电信窗口中工作频率的均匀带宽问题分两个阶段解决：首先，我们在斯托克斯频移高于 20 THz 的频率区域中获得了拉曼增益曲线的几乎精确的分析近似值，这在第二阶段显着简化了具有多个泵浦波长的配置中的增益带均衡。已经表明，通过增加泵浦源的数量，增益纹波可以从超过 3 dB 显着降低到 0.2 dBM从M = 2 到M = 6，然而，进一步增加M对增益带不规则性的改善几乎没有影响。