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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 26 — Dec. 12, 2011
  • pp: B862–B867

Pilot-based XPM nonlinearity compensator for CO-OFDM systems

Liang B. Y. Du and Arthur J. Lowery  »View Author Affiliations

Optics Express, Vol. 19, Issue 26, pp. B862-B867 (2011)

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We experimentally verify that pilot-based nonlinearity compensation is effective for mitigating XPM in CO-OFDM systems, if SPM is compensated first. A 6-dB increase in the nonlinear limit was produced by pilot-based XPM compensation after a single-step SPM compensator in a 400-km link with periodic dispersion compensation. In addition, we use numerical simulations to show that the required bandwidth of the guard-band around the pilot is almost independent of the bandwidth of the data-carrying sidebands. The optimal ratio of pilot to signal power also decreases for higher bandwidth OFDM signals. Therefore, the overhead associated with transmitting the pilot decreases as the bandwidth of the signal increases.

© 2011 OSA

OCIS Codes
(060.4080) Fiber optics and optical communications : Modulation
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(060.4510) Fiber optics and optical communications : Optical communications

ToC Category:
Transmission Systems and Network Elements

Original Manuscript: September 29, 2011
Revised Manuscript: November 10, 2011
Manuscript Accepted: November 18, 2011
Published: December 7, 2011

Virtual Issues
European Conference on Optical Communication 2011 (2011) Optics Express

Liang B. Y. Du and Arthur J. Lowery, "Pilot-based XPM nonlinearity compensator for CO-OFDM systems," Opt. Express 19, B862-B867 (2011)

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