Propagação digital reversa em sistemas de transmissão óptica.

Abstract

Digital Back-Propagation is a promising technique to compensate nonlinear distortions in optical communications systems. This work presents the basic concepts of DBP, focusing mainly on the Nonlinear Schr¨odinger Equation and the Split-Step Fourier Method. We also discuss possible limitations for the practical implementation of this method. The recent use of Digital Signal Processing in optical systems transfers the complexity from transmission to reception. Modern receptors are capable of compensating linear impairments, like chromatic dispersion, accurately. Nowadays, the performance is limited predominantly by the optical fiber nonlinear effects. Until recently, compensation of linear and nonlinear impairments were processed separately. DBP comes as a versatile and universal technique to jointly compensate both kinds of distortions.