2015/03/13 by P. Poggiolini, Poggiolini, P., Y. Jiang +5
Engineering · #Advanced Photonic Communication Systems #FOS: Physical sciences #Optical Network Technologies #Optics (physics.optics) #Photonic and Optical Devices
paper · pdf · doi:10.48550/arxiv.1503.04132
openalex publication_date 2015/03/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The GN model of non-linear fiber propagation has been shown to overestimate the variance of non-linearity due to the signal Gaussianity approximation, leading to maximum reach predictions for typical optical systems which may be pessimistic by about 5% to 15%, depending on fiber type and system set-up. Various models have been proposed which improve over the GN model accuracy. One of them is the EGN model, which completely removes the Gaussianity approximation from all non-linear interference (NLI) components. The EGN model is, however, substantially more complex than the GN model. Recently, we proposed a simple closed-form formula which permits to approximate the EGN model, starting from the GN. It was however limited to all-identical, equispaced channels, and did not correct single-channel NLI (also called SCI). In this follow-up contribution, we propose an improved version which both allows to address non-identical channels and corrects the SCI contribution as well. Extensive simulative testing shows the new formula to be asymptotically very accurate, for sufficiently large number of spans. This is a preliminary document which will be followed by a journal submission.