Kernel adaptive filtering-based phase noise compensation for pilot-free optical phase conjugated coherent systems

Abstract

We propose a kernel-based adaptive filtering method to suppress the phase noise (PN) arising from small deviations from ideal counter-phasing in the dual-pump fibre-based optical phase conjugation (OPC) of pilot-free quadrature-amplitude modulation (QAM) signals. We demonstrate experimentally and numerically that the proposed scheme achieves signal-to-noise ratio improvement over conventional PN compensation under optimised pump dithering settings in the OPC device and features no performance penalty across a range of pump-phase mismatch values, when it is used with a 16-QAM signal in an optical back-to-back configuration. We also illustrate the applicability of the method to the 64-QAM modulation format, and evaluate its performance in a transmission setup with mid-link OPC by means of numerical simulations.

Publication DOI: https://doi.org/10.1364/OE.456963
Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
College of Engineering & Physical Sciences
College of Engineering & Physical Sciences > School of Informatics and Digital Engineering > Electrical and Electronic Engineering
Additional Information: Published by Optica Publishing Group 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. Funding: UK Engineering and Physical Sciences Research Council ( EP/S003436/1 (PHOS), EP/S016171/1 (EEMC), EP/R035342/1 (TRANSNET)).
Uncontrolled Keywords: Atomic and Molecular Physics, and Optics
Publication ISSN: 1094-4087
Full Text Link:
Related URLs: https://opg.opt ... 19479&id=472968 (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2022-05-23
Accepted Date: 2022-05-04
Authors: Boscolo, Sonia (ORCID Profile 0000-0001-5388-2893)
Nguyen, Thanh Tu
Ali, Abdallah (ORCID Profile 0000-0003-4176-7542)
Sygletos, Stylianos (ORCID Profile 0000-0003-2063-8733)
Ellis, Andrew D. (ORCID Profile 0000-0002-0417-0547)

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