Impact of pump-signal overlap in S+C+L band discrete Raman amplifiers.
Impact of pump-signal overlap in S+C+L band discrete Raman amplifiers.
复制标题
S C L 波段离散拉曼放大器中泵浦信号重叠的影响。
DOI：
10.1364/oe.392258
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发表时间：
2020
期刊：
影响因子：
3.8
通讯作者：
W. Forysiak
中科院分区：
文献类型：
--
作者：
M. A. Iqbal;Gabriele Di Rosa;L. Krzczanowicz;I. Phillips;P. Harper;A. Richter;W. Forysiak
实验研究了超宽带(>；13THz)拉曼放大器中泵浦信号与信号重叠的影响，测量了在15db增益、150 nm(∼18.8THz)S+C+L波段离散拉曼放大器中相邻拉曼泵浦对30Gbaud PM-QPSK信号传输的影响。我们提出了一个有效的数值模型来预测反向传输拉曼泵浦的瑞利背向散射光的串扰引起的性能损失，该模型与实验结果吻合较好。基于典型的商用半导体激光泵浦二极管，必须在重叠的拉曼泵浦周围保留4 nm的保护波段，以确保在S波段的传输损失可以忽略不计。
We experimentally investigate the impact of pump-signal overlap in ultra-wideband (>13THz) Raman amplifiers and measure the transmission penalty on 30GBaud PM-QPSK signals due to adjacent Raman pumps in a 15dB gain, 150nm (∼18.8THz) S+C+L-band discrete Raman amplifier. We present an efficient numerical model to predict the performance penalty induced by crosstalk from Rayleigh backscattered light from backward-propagating Raman pumps showing good agreement with the experimental results. A 4nm guard-band must be retained around an overlapping Raman pump based on typical, commercial semiconductor laser pump diodes to ensure a negligible transmission penalty in S-band.