Soliton WDM Transmission of 8 X 2.5 Gb/s, error free over 10 Mm

The large gain bandwidth of erbium doped fiber amplifiers has stimulated interest in WDM systems with many channels. For transoceanic and other such long-haul systems, the number of channels is limited by the accumulated gain bandwidth, w hich tends to decrease rapidly with distance. For NRZ systems, additional limitations arise from four wave mixing among the channels. Soliton transmission reduces these problems and allows for greatly reduced channel spacing.1