Comparison of DSP-based nonlinear equalizers for intra-channel nonlinearity compensation in coherent optical OFDM

Abstract

A novel versatile digital signal processing (DSP)-based equalizer using support vector machine regression (SVR) is proposed for 16-quadrature amplitude modulated (16-QAM) coherent optical orthogonal frequency-division multiplexing (CO-OFDM) and experimentally compared to traditional DSP-based deterministic fiber-induced nonlinearity equalizers (NLEs), namely the full-field digital back-propagation (DBP) and the inverse Volterra series transfer function-based NLE (V-NLE). For a 40 Gb/s 16-QAM CO-OFDM at 2000 km, SVR-NLE extends the optimum launched optical power (LOP) by 4 dB compared to V-NLE by means of reduction of fiber nonlinearity. In comparison to full-field DBP at a LOP of 6 dBm, SVR-NLE outperforms by ∼1 dB in Q-factor. In addition, SVR-NLE is the most computational efficient DSP-NLE.

Publication DOI: https://doi.org/10.1364/OL.41.002509
Divisions: Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Engineering & Applied Sciences > Aston Institute of Photonics Technology
Additional Information: © 2016 Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited. Funding: Centre of Excellence (CE110001018); Laureate Fellowship (FL120100029); EPSRC (EP/J017582/1, EP/L000091/1); FAPESP (2015/04113-0).
Uncontrolled Keywords: Atomic and Molecular Physics, and Optics
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
https://www.osa ... i=ol-41-11-2509 (Publisher URL)
PURE Output Type: Article
Published Date: 2016-06-01
Published Online Date: 2016-05-20
Accepted Date: 2016-04-28
Authors: Giacoumidis, Elias
Mhatli, Sofien
Nguyen, Tu
Le, Son T. ( 0000-0002-3824-9456)
Aldaya, Ivan
McCarthy, Mary E. ( 0000-0002-1348-1574)
Ellis, Andrew D. ( 0000-0002-0417-0547)
Eggleton, Benjamin J.

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