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

Giacoumidis, Elias, Mhatli, Sofien, Nguyen, Tu, Le, Son T., Aldaya, Ivan, McCarthy, Mary E., Ellis, Andrew D. and Eggleton, Benjamin J. (2016). Comparison of DSP-based nonlinear equalizers for intra-channel nonlinearity compensation in coherent optical OFDM. Optics Letters, 41 (11), pp. 2509-2512.

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)
Published Date: 2016-06-01
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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