Lightwave communications is a necessity for the information age. Optical links provide
enormous bandwidth, and the optical fiber is the only medium that can meet the modern …

Different aspects of probabilistic shaping for a multispan optical communication system are
studied. First, a numerical analysis of the additive white Gaussian noise (AWGN) channel …

This tutorial paper presents an overview of advanced FEC and coded modulation (CM) for
optical communications. It describes the following ultra-high-speed optical transport …

We investigated the reach increase obtained through nonlinearity mitigation by means of
transmission symbol rate optimization (SRO). First, we did this theoretically and simulatively …

This work proposes a probabilistic shaping scheme for optical WDM systems, where
nonlinear interference noise depends on the input optical signal power distribution. With …

We investigate upper bounds for single-channel and multi-channel digital back-propagation
(BP) in fully loaded wavelength-division multiplexed systems. Using the time-domain model …

Optimization of channel powers to maximize minimum margin or total capacity in WDM
systems is studied. Using a Gaussian noise nonlinearity model, the signal-to-noise ratio …

The concept and significance of the so called nonlinear Shannon limit are reviewed and
their relation to the channel capacity is analyzed from an information theory point of view. It …

A comprehensive study of the coded performance of long-haul spectrally-efficient WDM
optical fiber transmission systems with different coded modulation decoding structures is …

Enabling Technologies for High Spectral-efficiency Coherent Optical Communication
Networks Presents the technological advancements that enable high spectral-efficiency and …