Digital backpropagation accounting for polarization-mode dispersion
Journal article, 2017

Digital backpropagation (DBP) is a promising digital-domain technique to mitigate Kerr-induced nonlinear interference. While it successfully removes deterministic signal-signal interactions, the performance of ideal DBP is limited by stochastic effects, such as polarizationmode dispersion (PMD). In this paper, we consider an ideal full-field DBP implementation and modify it to additionally account for PMD; reversing the PMD effects in the backward propagation by passing the reverse propagated signal also through PMD sections, which concatenated equal the inverse of the PMD in the forward propagation. These PMD sections are calculated analytically at the receiver based on the total accumulated PMD of the link estimated from channel equalizers. Numerical simulations show that, accounting for nonlinear polarization-related interactions in the modified DBP algorithm, additional signal-to-noise ratio gains of 1.1 dB are obtained for transmission over 1000 km.

Author

Cristian Bogdan Czegledi

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

Gabriele Liga

University College London (UCL)

Domaniç Lavery

University College London (UCL)

Magnus Karlsson

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Erik Agrell

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

Seb J. Savory

University of Cambridge

Polina Bayvel

University College London (UCL)

Optics Express

1094-4087 (ISSN)

Vol. 25 3 1903-1915

Adaptive optical networks: Theory and algorithms for system optimization

Swedish Research Council (VR), 2013-01-01 -- 2016-12-31.

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Building Futures (2010-2018)

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1364/OE.25.001903

More information

Latest update

8/28/2019