Several approximate non-linear fiber propagation models have been proposed over the
years. Recent re-consideration and extension of earlier modeling efforts has led to the …

The GN-model has been proposed as an approximate but sufficiently accurate tool for
predicting uncompensated optical coherent transmission system performance, in realistic …

Through a series of extensive system simulations we show that all of the previously not
understood discrepancies between the Gaussian noise (GN) model and simulations can be …

The GN model of nonlinear fiber propagation has been shown to overestimate the variance
of nonlinearity due to the signal Gaussianity approximation, leading to maximum reach …

Operators are pressured to maximize the achieved capacity over deployed links. This can be
obtained by operating in the weakly nonlinear regime, requiring a precise understanding of …

Coherent dual-polarization (DP) optical transmission systems encode information on the
four available degrees of freedom of an optical field: the two polarization states, each with …

The stationary statistical properties of independent, identically distributed (iid) input symbols
provide insights on the induced nonlinear interference (NLI) during fiber transmission. For …

Recently, a metric called energy dispersion index (EDI) was proposed to qualitatively
indicate the nonlinear interference (NLI) induced by correlated symbols during optical …

This chapter aims to provide a comprehensive picture of the impact of fiber nonlinear effects
on modern coherent wavelength division multiplexing (WDM) systems' performance. First …

In optical communications, four-dimensional (4D) modulation formats encode information
onto the quadrature components of two arbitrary orthogonal states of polarisation of the …