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

Elias Giacoumidis*, Sofien Mhatli, Tu Nguyen, Son T. Le, Ivan Aldaya, Mary E. McCarthy, Andrew D. Ellis, Benjamin J. Eggleton

*Corresponding author for this work

Research output: Contribution to journalArticle

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.

Original languageEnglish
Pages (from-to)2509-2512
Number of pages4
JournalOptics Letters
Volume41
Issue number11
Early online date20 May 2016
DOIs
Publication statusPublished - 1 Jun 2016

Bibliographical note

© 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).

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    Giacoumidis, E., Mhatli, S., Nguyen, T., Le, S. T., Aldaya, I., McCarthy, M. E., Ellis, A. D., & Eggleton, B. J. (2016). Comparison of DSP-based nonlinear equalizers for intra-channel nonlinearity compensation in coherent optical OFDM. Optics Letters, 41(11), 2509-2512. https://doi.org/10.1364/OL.41.002509