In this paper, we present a novel erbium–ytterbium doped fiber amplifier (EYDFA) + Raman + EYDFA hybrid optical amplifier (HOA) for a super-dense wavelength division multiplexing (SD-WDM) system application. The performance of the 100-channel system has been investigated for an overall data rate and channel spacing of 100Gb/s and 0.4nm, respectively, over a wavelength span of 1550–1589.9nm. HOA has been optimized for Raman length, EYDFA lengths, pump powers and Er+ concentrations to achieve high average gain and low gain variation ratio of 40.41dB and 0.40respectively. The optimized configuration of the proposed HOA has been compared with EYDFA + Raman and Raman + EYDFA HOA configurations. The achieved high and flat gain with an acceptable output optical signal to noise ratio (OSNR) in case of EYDFA + Raman + EYDFA HOA; makes it an optimum choice for SD-WDM systems.

中文翻译：

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C+L波段SD-WDM系统EYDFA+拉曼+EYDFA混合光放大器的研究与优化

在本文中，我们提出了一种用于超密集波分复用 (SD-WDM) 系统应用的新型掺铒镱光纤放大器 (EYDFA) + 拉曼 + EYDFA 混合光放大器 (HOA)。已经研究了 100 通道系统的性能，总数据速率和通道间隔为 100Gb/s 和 0.4nm，分别在 1550–1589.9 的波长范围内纳米。HOA 针对拉曼长度、EYDFA 长度、泵浦功率和 Er 进行了优化+浓度以实现 40.41 的高平均增益和低增益变化比分贝和 0.40分别。建议的 HOA 的优化配置已与 EYDFA + Raman 和 Raman + EYDFA HOA 配置进行了比较。在 EYDFA + 拉曼 + EYDFA HOA 的情况下，获得的高平坦增益和可接受的输出光信噪比 (OSNR)；使其成为 SD-WDM 系统的最佳选择。