WDM faseroptisches Übertragungssystem mit verbesserter Dispersionskompensation

The system includes a transmitter, a receiver and an optical fibre transmission path that connects the transmitter and receiver. The system transmits signals in N transmission channels of wavelengths lambda 1-lambda N, where N is an integer greater than 1. The transmission path comprises first single mode optical fibre with non-zero chromatic dispersion of a first mathematical sign at the wavelengths lambda 1-lambda N. The path also has dispersion compensating second single mode optical fibre (13) with non-zero chromatic dispersion of a second mathematical sign at the wavelengths lambda 1-lambda N. The transmission path also has a third single mode optical fibre which is a dispersion slope compensating fibre (14) or DSCF. The DSCF has a dispersion slope in the wavelength range lambda 1-lambda N. The dispersion slope and the length of the DSCF in the transmission path are selected so that the total chromatic dispersion of the transmission path at all of the wavelengths lambda 1-lambda N is nominally zero.