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Digital Back Propagation via Sub-band Processing in Spatial Multiplexing Systems

Ferreira, FM; Sillekens, E; Karanov, BP; Killey, RI; (2020) Digital Back Propagation via Sub-band Processing in Spatial Multiplexing Systems. Journal of Lightwave Technology 10.1109/JLT.2020.3046076. (In press). Green open access

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Abstract

An advanced digital backward-propagation (DBP) method using a separate-channels approach (SCA) is investigated for the compensation of inter-channel nonlinearities in spatial- and wavelength-multiplexed systems. Compared to the conventional DBP, intra- and inter-mode cross-phase modulation can be efficiently compensated by including the effect of the inter-channel walk-off in the nonlinear step of the split-step Fourier method. We found that the SCA-DBP relaxes the step size requirements by a factor of 10, while improving performance by 0.8 dB for large walk-off and strong linear coupling. For the first time, it is shown that in spatial multiplexed systems transmission performance can be improved by sub-band processing of back propagated channels.

Type: Article
Title: Digital Back Propagation via Sub-band Processing in Spatial Multiplexing Systems
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/JLT.2020.3046076
Publisher version: https://doi.org/10.1109/JLT.2020.3046076
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions.
UCL classification: UCL
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/10115615
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