Predição de enlaces submarinos utilizando o método numérico perturbativo do ruído gaussiano

Abstract

The process of predicting the optical performance of underwater optical systems is quite complex, due to the fact that several parameters of the network are taken into account. But this is a process of fundamental importance, given that optical links are constantly evolving and expanding. This happens because data traffic on telecommunications networks has been increasing exponentially over the years, due to the emergence of services that demand higher and higher rates. In this context, this course conclusion work proposes the use of a numerical model of Gaussian noise (GN) as a solution for predictions of underwater optical systems that use coherent modulation and equally spaced spans. The GN method is mainly based on expressing the linear effect of chromatic dispersion and the non-linear effects of self-phase modulation (SPM) and cross-phase modulation (XPM), through a Gaussian noise. Thus, the applied equations are simplified which provides gains in the processing of these data. In view of the results obtained, it was verified that the use of the GN method presented a satisfactory approximation, in the calculation of the OSNR and the penalty introduced by the optical network, when compared to the same results acquired in simulations carried out in the OptiSystem® software. Therefore, the Gaussian noise perturbative model is a solution in the planning projects of underwater optical networks, to predict the optical performance of such systems.