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
|Number of pages||9|
|Publication status||Published - 5 Jun 2020|
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The impact of pump-signal overlap in S+C+L band discrete Raman amplifiers
Iqbal, M. A. (Creator), Di Rosa, G. (Creator), Krzczanowicz, L. (Creator), Phillips, I. (Creator), Harper, P. (Creator), Richter, A. (Creator) & Forysiak, W. (Creator), Aston Data Explorer, 15 Apr 2020
DOI: 10.17036/researchdata.aston.ac.uk.00000466, https://www.osapublishing.org/oe/abstract.cfm?uri=oe-28-12-18440