On the limits of digital back-propagation in the presence of transceiver noise
Journal article, 2017

© 2017, OSA - The Optical Society. All rights reserved. This paper investigates the impact of transceiver noise on the performance of digital back-propagation (DBP). A generalized expression to estimate the signal-to-noise ratio (SNR) obtained using DBP in the presence of transceiver noise is described. This new expression correctly accounts for the nonlinear beating between the transceiver noise and the signal in the optical fiber transmission link. The transceiver noise-signal nonlinear beating has been identified as the main reason for the discrepancy between predicted and practical performance of DBP; which has not been previously suggested. This nonlinear beating has been included in the GN model, allowing DBP gains in practical systems to be predicted analytically. Experiments and split-step simulations with and without polarization-mode dispersion (PMD) in the transmission link have been performed. The results show that the impact of transceiver noise greatly outweighs that of PMD, and the analytical expressions are confirmed by the numerical simulations.

Author

Lidia Galdino

University College London (UCL)

Daniel Semrau

University College London (UCL)

Domaniç Lavery

University College London (UCL)

Gabriel Saavedra

University College London (UCL)

Cristian Bogdan Czegledi

Chalmers, Signals and Systems, Communication and Antenna Systems, Communication Systems

Erik Agrell

Chalmers, Signals and Systems, Communication and Antenna Systems, Communication Systems

Robert I. Killey

University College London (UCL)

Polina Bayvel

University College London (UCL)

Optics Express

1094-4087 (ISSN)

Vol. 25 4 4564-4578

Infrastructure

C3SE (Chalmers Centre for Computational Science and Engineering)

Subject Categories

Communication Systems

Electrical Engineering, Electronic Engineering, Information Engineering

Signal Processing

DOI

10.1364/OE.25.004564

More information

Latest update

8/28/2019