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On the limits of digital back-propagation in the presence of transceiver noise

Galdino, L; Semrau, D; Lavery, D; Saavedra, G; Czegledi, CB; Agrell, E; Killey, RI; (2017) On the limits of digital back-propagation in the presence of transceiver noise. Optics Express , 25 (4) pp. 4564-4578. 10.1364/OE.25.004564. Green open access

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Abstract

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.

Type: Article
Title: On the limits of digital back-propagation in the presence of transceiver noise
Open access status: An open access version is available from UCL Discovery
DOI: 10.1364/OE.25.004564
Publisher version: http://dx.doi.org/10.1364/OE.25.004564
Language: English
Additional information: Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Keywords: Science & Technology, Physical Sciences, Optics, BACK-PROPAGATION, GN-MODEL, TRANSMISSION, COMPENSATION, PMD
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1553656
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