A Raman gain module compensating for both loss and dispersion of a 40 km standard telecommunication fibre span over the 1510–1565 nm band is reported. The optimised configuration ensures a low signal-spontaneous noise figure and negligible double-Rayleigh scattering noise. The high-gain margin of the amplifier makes it applicable for compensation of an 80 km span.
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Lewis et al. (2000) studied this question.
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