Soliton Interaction And Spectral Laser Linewidth In Wavelength Multiplexing Transmission Systems

All-optical transmission systems using solitons and wavelength division multiplexing (WDM) are proposed for long-distance communication systems /Mo/. For narrow-spaced channels, in WDM systems with periodically compensated loss, soliton interaction limits the maximum error-free transmission rate. For a bit error rate of 10
^-9
, an overall variance of time jitter less then 1.02 is necessary /Mo/. Here, new results on soliton interaction are presented paying account to practically attractive wide channel spacings, interaction-caused frequency and time shifts, and laser linewidth. A novel method using separation of the nonlinear Schroedinger-equation in frequency space is used.