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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 23 — Nov. 18, 2013
  • pp: 28668–28675

Ideal optical backpropagation of scalar NLSE using dispersion-decreasing fibers for WDM transmission

Xiaojun Liang, Shiva Kumar, and Jing Shao  »View Author Affiliations

Optics Express, Vol. 21, Issue 23, pp. 28668-28675 (2013)

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An ideal optical backpropagation (OBP) scheme to compensate for dispersion and nonlinear effects of the transmission fibers is proposed. The scheme consists of an optical phase conjugator (OPC), N spans of dispersion-decreasing fibers (DDFs) and amplifiers, placed at the end of the fiber optic link. In order to compensate for the nonlinear effects of the transmission fibers exactly, the nonlinear coefficient of the backpropagation fiber has to increase exponentially with distance or equivalently the power in the backpropagation fiber should increase exponentially with distance if the nonlinear coefficient is constant. In this paper, it is shown that a combination of DDFs and amplifiers can compensate for the nonlinear effects exactly. An analytical expression for the dispersion profile of the DDF is derived. Numerical simulation of a long haul wavelength division multiplexing (WDM) fiber optic system with the proposed OBP scheme shows that the system reach can be enhanced by 54% as compared to digital backpropagation (DBP).

© 2013 Optical Society of America

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(190.4370) Nonlinear optics : Nonlinear optics, fibers
(190.5040) Nonlinear optics : Phase conjugation
(260.2030) Physical optics : Dispersion

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: October 3, 2013
Revised Manuscript: November 7, 2013
Manuscript Accepted: November 8, 2013
Published: November 14, 2013

Xiaojun Liang, Shiva Kumar, and Jing Shao, "Ideal optical backpropagation of scalar NLSE using dispersion-decreasing fibers for WDM transmission," Opt. Express 21, 28668-28675 (2013)

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