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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 5 — Mar. 11, 2013
  • pp: 6409–6421

Dual-polarization OFDM-OQAM for communications over optical fibers with coherent detection

François Horlin, Jessica Fickers, Philippe Emplit, André Bourdoux, and Jérome Louveaux  »View Author Affiliations

Optics Express, Vol. 21, Issue 5, pp. 6409-6421 (2013)

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In order to improve the spectral efficiency of coherent optical communication systems, it has recently been proposed to make use of the orthogonal frequency-division multiplexing offset quadrature amplitude modulation (OFDM-OQAM). Multiple optical channels spaced in the frequency domain by the symbol rate can be transmitted orthogonally, even if each channel overlaps significantly in frequency with its two adjacent channels. The solutions proposed until now in the literature unfortunately only address a single polarization communication, and therefore do not benefit from the capacity gain reached when two polarizations are used to transmit independent information signals. The aim of the present paper is to propose a receiver architecture that can decouple the two polarizations. We build an equalizer per channel at twice the symbol rate and optimize it based on the minimum mean square error (MMSE) criterion. We demonstrate the efficiency of the resulting system compared to the Nyquist wavelength-division multiplexing (N-WDM) system both in terms of performance and complexity. We also assess the system sensitivity to transmit synchronization errors and show that system can even work under significant synchronization errors.

© 2013 OSA

OCIS Codes
(060.1660) Fiber optics and optical communications : Coherent communications
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.4080) Fiber optics and optical communications : Modulation

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: January 18, 2013
Revised Manuscript: February 18, 2013
Manuscript Accepted: February 18, 2013
Published: March 6, 2013

François Horlin, Jessica Fickers, Philippe Emplit, André Bourdoux, and Jérome Louveaux, "Dual-polarization OFDM-OQAM for communications over optical fibers with coherent detection," Opt. Express 21, 6409-6421 (2013)

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