Demonstration of phase-conjugated subcarrier coding for fiber nonlinearity compensation in CO-OFDM transmission

Son Thai Le, Mary E. McCarthy, Naoise Mac Suibhne, Mohammad A.Z. Al-Khateeb, Elias Giacoumidis, Nick Doran, Andrew D. Ellis, Sergei K. Turitsyn

Research output: Contribution to journalArticle

Abstract

In this paper, we demonstrate through computer simulation and experiment a novel subcarrier coding scheme combined with pre-electrical dispersion compensation (pre-EDC) for fiber nonlinearity mitigation in coherent optical orthogonal frequency division multiplexing (CO-OFDM) systems. As the frequency spacing in CO-OFDM systems is usually small (tens of MHz), neighbouring subcarriers tend to experience correlated nonlinear distortions after propagation over a fiber link. As a consequence, nonlinearity mitigation can be achieved by encoding and processing neighbouring OFDM subcarriers simultaneously. Herein, we propose to adopt the concept of dual phase conjugated twin wave for CO-OFDM transmission. Simulation and experimental results show that this simple technique combined with 50% pre-EDC can effectively offer up to 1.5 and 0.8 dB performance gains in CO-OFDM systems with BPSK and QPSK modulation formats, respectively.

Original languageEnglish
Pages (from-to)2206-2212
Number of pages7
JournalJournal of Lightwave Technology
Volume33
Issue number11
Early online date13 Mar 2015
DOIs
Publication statusPublished - 1 Jun 2015

    Fingerprint

Bibliographical note

© 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

Funding: Research funded by Sterlite Technologies and Finisar; European Commission's 7th Framework Programme (258033, 318137, 318415); and EPSRC (EP/J017582/1, EP/L000091/1).

Keywords

  • coherent detection
  • coherent optical transmission
  • nonlinearity mitigation
  • orthogonal frequency division multiplexing.

Cite this