Modelling of nonlinear crosstalk in optical fibre wavelength-division multiplexed telecommunication systems

Nonlinear effects in optical fibres play an important role for transmission parameters in wavelength-division multiplexed telecommunication systems. T hose effects cause an additional attenuation, distortion and inter-channel interference of the multi-wavelength optical signal. Therefore, it is impor tant to optimise inter-channel wavelength span in a wavelength-division mul tiplexed system, and also the optical power and transmission bit-rate. Anot her drawback is a limitation of the number of the transmitted optical chann els and network nodes. The paper reports the results of the analysis and co mputer simulations of the wavelength-division multiplexed transmission thro ugh fibre link in a presence of nonlinear effects: self-phase modulation, c ross-phase modulation, Raman scattering, four-wave mixing. The analysis ena bles network designers to evaluate the system performance and to optimise t ransmission parameters.