The GN-Model of Fiber Non-Linear Propagation and its Applications

Abstract

Several approximate non-linear fiber propagation models have been proposed over the years. Recent reconsideration and extension of earlier modeling efforts has led to the formalization of the so-called Gaussian-Noise (GN) model.The evidence collected so far hints at the GN-model as being a relatively simple and, at the same time, sufficiently reliable tool for performance prediction of uncompensated coherent systems, characterized by a favorable accuracy vs. complexity trade-off.This paper tries to pull together the recent results regarding the GN-model definition, understanding, relations vs. other models, validation, limitations, closed form solutions, approximations and, in general, its applications and implications in link analysis and optimization, also within a network environment.

Impairment mitigation in superchannels with digital backpropagation and MLSD

“…NRZ pulses were generated with ideal rectangular shape, while RZ 50% pulse shape corresponds to the one described in [14]. The bit sequences used are decorrelated pieces of a pseudo-random bit sequence (PRBS, 2 23 − 1) with a fixed length of 2 19 bits per carrier. The symbol sequences of different carriers were decorrelated randomly by at least 173 symbols.…”

Resource Allocation in Elastic Optical Networks with Physical-Layer Impairments

“…PLIs of EONs have been studied for the past several years. Estimation of the PLIs plays an important role in the network stage planning [13][14][15]. The most common model for estimating the PLIs is the transmission reach (TR) model [13], which approximates the maximum distance a signal can travel without regeneration.…”

“…When we apply the TR model in realistic scenarios of routing and spectrum allocation for EONs, it severely overestimates the PLIs. In order to obtain a more accurate estimate of channel PLIs, a state-dependent model, the Gaussian noise (GN) model [11,15], has been proposed.…”

“…When ∆f i is large, the inverse hyperbolic sine function and the logarithm function are similar [6,32]. Equation (2.3) can thus be replaced by [15] …”

Redes ópticas de longa distância com transceptores de taxa de código variável

“…Como apresentado anteriormente, em situações nas quais deseja-se avaliar o impacto da interferência não-linear oriunda de espectro com banda reduzida, e.g., da ordem de gigahertz, a hipótese de acúmulo coerente de interferência NL torna-se mais fidedigna com os resultados experimentais [31].…”