Interactions of differential phase-shift keying (DPSK) dispersion-managed (DM) solitons and jitter in long haul fiber links with lumped in-line filters

摘要

We formulate a model for investigating the transmission of date coded in the differential-phase-shift-keying (DPSK) format by soliton streams in the model of the dispersion-managed (DM) fiber link with in-line filters. First, we consider the transmission of the simplest two- and three-soliton strings, and then long multi-soliton ones. Summarizing results of systematic simulations, we identify a range 1.55 /spl les/ S /spl les/ 1.95, which provides for the optimal transmission regime (which is defined as that in which the bit-error-rate, BER, is kept below an acceptable limit, for a fixed large transmission distance). We also identify an interval of values of the filters' bandwidth to guarantee an optimal operation regime. The simulations of the model with and without the amplified-spontaneous-emission (ASE) noise demonstrate that the limit on the transmission distance, necessary to keep BER below the acceptable level, is determined solely by the inter-soliton interactions, rather than by the ASE noise.