Method of reducing intensity distortion induced by cross phase modulation in a WDM optical fiber transmission system

摘要

The invention relates to a method of reducing the intensity distortion induced by cross phase modulation in a wavelength division multiplexed optical fiber transmission system comprising a transmission line made up of a plurality of optical fiber segments with repeaters interposed between successive optical fiber segments, the transmission system having N different wavelength channels, where N is an integer greater than unity. In each repeater interconnecting first and second consecutive fiber segments, a time offset is introduced between the channels in such a manner that compared with the inlet of the first optical segment, the (n+1)^th and the n^th channels are offset by &tgr;_n at the inlet to the second fiber segment, where n is an integer less than or equal to N, where &tgr;_n is selected to be greater than zero and less than a value that eliminates correlation between the intensity distortion contributions of each fiber segment.