Gain enhancement in gain-shifted erbium-doped fiber amplifiers for WDM applications
Gain enhancement in gain-shifted erbium-doped fiber amplifiers for WDM applications
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用于 WDM 应用的增益移位掺铒光纤放大器的增益增强
DOI：
10.1109/68.784205
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发表时间：
1999
影响因子：
2.6
通讯作者：
M. Karasek
中科院分区：
文献类型：
--
作者：
M. Karasek
分析了利用放大自发辐射(ASE)提高增益移位掺铒光纤放大器(GS-EDFA)的增益。结果表明，在多波长条件下，利用反向传播的ASE来反转两级GS-EDFA中未抽运的第一级，可以获得高达5分贝的增益增强。给出了在1580 nm波段实现多波长工作的两级GS-EDFA的平坦增益和噪声损失最小化的设计准则。该分析基于一个综合的大信号数值模型的应用，该模型考虑了信号的传播、泵浦以及ASE下游和上游功率的传播。
Utilization of amplified spontaneous emission (ASE) for gain enhancement in gain-shifted erbium-doped fiber amplifier (GS-EDFA) is analyzed. It is shown that in a multiwavelength regime, gain enhancement as high as 5 dB can be achieved when the counterpropagating ASE is used to invert an unpumped first stage of a two-stage GS-EDFA. We present design criteria for flat gain operation and noise penalty minimization of two-stage GS-EDFAs determined for multiwavelength operation in the 1580-nm wavelength band. The analysis is based on an application of a comprehensive large-signal numerical model which takes into consideration propagation of signal, pump and both the downstream and upstream ASE powers.