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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 1 — Jan. 14, 2013
  • pp: 276–288

Experimental demonstration of a frequency-domain Volterra series nonlinear equalizer in polarization-multiplexed transmission

Fernando P. Guiomar, Jacklyn D. Reis, Andrea Carena, Gabriella Bosco, António L. Teixeira, and Armando N. Pinto  »View Author Affiliations


Optics Express, Vol. 21, Issue 1, pp. 276-288 (2013)
http://dx.doi.org/10.1364/OE.21.000276


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Abstract

Employing 100G polarization-multiplexed quaternary phase-shift keying (PM-QPSK) signals, we experimentally demonstrate a dual-polarization Volterra series nonlinear equalizer (VSNE) applied in frequency-domain, to mitigate intra-channel nonlinearities. The performance of the dual-polarization VSNE is assessed in both single-channel and in wavelength-division multiplexing (WDM) scenarios, providing direct comparisons with its single-polarization version and with the widely studied back-propagation split-step Fourier (SSF) approach. In single-channel transmission, the optimum power has been increased by about 1 dB, relatively to the single-polarization equalizers, and up to 3 dB over linear equalization, with a corresponding bit error rate (BER) reduction of up to 63% and 85%, respectively. Despite of the impact of inter-channel nonlinearities, we show that intra-channel nonlinear equalization is still able to provide approximately 1 dB improvement in the optimum power and a BER reduction of ∼33%, considering a 66 GHz WDM grid. By means of simulation, we demonstrate that the performance of nonlinear equalization can be substantially enhanced if both optical and electrical filtering are optimized, enabling the VSNE technique to outperform its SSF counterpart at high input powers.

© 2013 OSA

OCIS Codes
(060.1660) Fiber optics and optical communications : Coherent communications
(060.2330) Fiber optics and optical communications : Fiber optics communications

ToC Category:
Transmission Systems and Network Elements

History
Original Manuscript: October 2, 2012
Revised Manuscript: December 1, 2012
Manuscript Accepted: December 2, 2012
Published: January 4, 2013

Virtual Issues
European Conference on Optical Communication 2012 (2012) Optics Express

Citation
Fernando P. Guiomar, Jacklyn D. Reis, Andrea Carena, Gabriella Bosco, António L. Teixeira, and Armando N. Pinto, "Experimental demonstration of a frequency-domain Volterra series nonlinear equalizer in polarization-multiplexed transmission," Opt. Express 21, 276-288 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-1-276


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