A novel C + L band hybrid erbium-doped fibre amplifier (EDFA) using a two-stage configuration was proposed and demonstrated experimentally. The amplifier is composed of a 0.5-m long hafnium bismuth erbium co-doped fibre (EDF) to provide gain within the C-band and a 4-m long zirconia-based EDF to provide gain within the L-band. The proposed amplifier was examined based on the multi-wavelength input source. A parallel pumping distribution technique was used to mitigate the amplifier complexity. The C + L band amplifier achieved a gain flattening of over 55 nm bandwidth for the three levels of the input powers. A gain-flattening of roughly 10.9, 15.5, and 19.2 dB were obtained, respectively, for the input signal powers of −5, −10, and −15 dBm. An average noise figure of 6.4, 5.4, and 4.7 dB was achieved, respectively, for the input signal powers of −5, −10, and −15 dBm.

中文翻译：

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采用并行泵送分配技术在C + L频段工作的增益平坦混合EDFA

提出并采用两阶段配置的新型C + L波段混合掺hybrid光纤放大器（EDFA）。该放大器由一个0.5米长的co铋co共掺杂光纤（EDF）提供C波段内的增益，以及一个4米长的氧化锆基EDF以提供L波段内的增益。建议的放大器基于多波长输入源进行了检查。使用并行泵浦分配技术来减轻放大器的复杂性。对于三个级别的输入功率，C + L波段放大器的增益平坦度超过55 nm。对于-5，-10和-15 dBm的输入信号功率，分别获得了大约10.9、15.5和19.2 dB的增益平坦度。平均噪声系数分别达到6.4、5.4和4.7 dB，