Abstract
The authors present, for the first time, 32/spl times/10 Gbit/s transmission (50 GHz channel spacing) in the zero-dispersion region of dispersion-shifted fibre (DSF) by employing multiwavelength distributed Raman amplification. Each transmission span is bi-directionally pumped at two wavelengths, 1450 and 1465 nm, to construct a wideband distributed Raman amplifier. A hybrid amplifier formed by a gain-flattened erbium-doped fibre amplifier and a gain-flattened distributed Raman amplifier is used to successfully realise dense WDM transmission in the zero-dispersion region over 8/spl times/80 km of DSF.
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