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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 7 — Apr. 7, 2014
  • pp: 8598–8616

Analytical characterization of four wave mixing effect in direct-detection double-sideband OFDM optical transmission systems

Tiago M. F. Alves and Adolfo V. T. Cartaxo  »View Author Affiliations

Optics Express, Vol. 22, Issue 7, pp. 8598-8616 (2014)

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A closed-form expression for the variance of the four-wave mixing (FWM) induced in each subcarrier of a double sideband orthogonal frequency division multiplexing (OFDM) system employing direct detection is proposed and validated. Particularly, using a small signal analysis, equivalent transfer functions that characterize the frequency response of the FWM effect are derived taking into account the walkoff effect between the modulated pump waves and the FWM wave. The accuracy of the variance estimates provided by the closed-form expression is assessed for different sets of system parameters. The closed-form expression provides good variance estimates of the FWM-induced degradation caused by degenerate and nonsymmetric nondegenerate FWM components. For symmetric non-degenerate FWM components, the proposed expression provides reliable but pessimistic variance estimates, not exceeding the actual FWM variance in 1.5 dB for modulation indexes of interest.

© 2014 Optical Society of America

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2330) Fiber optics and optical communications : Fiber optics communications

ToC Category:
Optical Communications

Original Manuscript: December 16, 2013
Revised Manuscript: February 14, 2014
Manuscript Accepted: February 22, 2014
Published: April 3, 2014

Tiago M. F. Alves and Adolfo V. T. Cartaxo, "Analytical characterization of four wave mixing effect in direct-detection double-sideband OFDM optical transmission systems," Opt. Express 22, 8598-8616 (2014)

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