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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 22 — Nov. 4, 2013
  • pp: 25685–25699

Properties of nonlinear noise in long, dispersion-uncompensated fiber links

Ronen Dar, Meir Feder, Antonio Mecozzi, and Mark Shtaif  »View Author Affiliations

Optics Express, Vol. 21, Issue 22, pp. 25685-25699 (2013)

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We study the properties of nonlinear interference noise (NLIN) in fiber-optic communications systems with large accumulated dispersion. Our focus is on settling the discrepancy between the results of the Gaussian noise (GN) model (according to which NLIN is additive Gaussian) and a recently published time-domain analysis, which attributes drastically different properties to the NLIN. Upon reviewing the two approaches we identify several unjustified assumptions that are key in the derivation of the GN model, and that are responsible for the discrepancy. We derive the true NLIN power and verify that the NLIN is not additive Gaussian, but rather it depends strongly on the data transmitted in the channel of interest. In addition we validate the time-domain model numerically and demonstrate the strong dependence of the NLIN on the interfering channels’ modulation format.

© 2013 Optical Society of America

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.2360) Fiber optics and optical communications : Fiber optics links and subsystems

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: July 29, 2013
Revised Manuscript: September 7, 2013
Manuscript Accepted: September 16, 2013
Published: October 21, 2013

Ronen Dar, Meir Feder, Antonio Mecozzi, and Mark Shtaif, "Properties of nonlinear noise in long, dispersion-uncompensated fiber links," Opt. Express 21, 25685-25699 (2013)

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  22. We have assumed a fixed position independent dispersion parameter β″. The generalization to position dependent dispersion is straightforward, but we avoid it as it considerably complicates the notation.
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  29. The numerical curves in Figs. 3 and 4 reproduce the plots reported in [20], but with larger statsitics.

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