Soliton optical fiber communication system

摘要

In soliton optical fiber communication systems that comprise a multiplicity of spaced-apart intermediate non-electronic amplifiers, pulse arrival time jitter can be substantially reduced by incorporation into the transmission path of spaced-apart bandwidth-limiting elements. Exemplarily, the bandwidth-limiting elements are optical filters of bandwidth Bf, with a filter associated with each intermediate amplifier, and with Bf chosen to fall within the range Bsol(Nf/3)1/2, where Bsol is the FWHM spectral width of the soliton pulses, and Nf is the number of intermediate filters in the system. More generally, the bandwidth-limiting elements are selected such that δt², the variance of the jitter, is at most 90% of the variance associated with an, otherwise identical, comparison system that does not contain the bandwidth-limiting elements. Systems according to the invention thus can overcome the Gordon-Haus limit (in the bit rate/distance product.