Digital compensation of imperfect pump counter-phasing induced phase distortion in optical phase conjugation of high-order QAM

Abstract

We propose a new two-stage digital signal processing scheme to suppress the phase distortion that arises from imperfect pump counter-phasing in a dual-pump fibre-based optical phase conjugation system. We demonstrate experimentally and numerically a signal-to-noise ratio improvement of more than 4 dB relative to conventional phase noise compensation, when the proposed scheme is used with 16/64/256 quadrature-amplitude modulation signals at pump-phase mismatch values as large as 8°.

Publication DOI: https://doi.org/10.1364/OE.418386
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 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. Funding. This work was supported by the UK EPSRC (Engineering and Physical Sciences Research Council) (EP/R035342/1 - TRANSNET, EP/S003436/1 - PHOS, EP/S016171/1 - EEMC).
Full Text Link:
Related URLs: https://www.osa ... 17464&id=451281 (Publisher URL)
PURE Output Type: Article
Published Date: 2021-05-24
Published Online Date: 2021-05-21
Accepted Date: 2021-03-23
Authors: Nguyen, Thanh Tu
Boscolo, Sonia (ORCID Profile 0000-0001-5388-2893)
Ali, Abdallah
Sygletos, Stylianos (ORCID Profile 0000-0003-2063-8733)
Takasaka, Shigehiro
Sugizaki, Ryuichi
Ellis, Andrew D. (ORCID Profile 0000-0002-0417-0547)

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