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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 14 — Jul. 2, 2012
  • pp: 15769–15780

High-order statistical equalizer for nonlinearity compensation in dispersion-managed coherent optical communications

Toshiaki Koike-Akino, Chunjie Duan, Kieran Parsons, Keisuke Kojima, Tsuyoshi Yoshida, Takashi Sugihara, and Takashi Mizuochi  »View Author Affiliations


Optics Express, Vol. 20, Issue 14, pp. 15769-15780 (2012)
http://dx.doi.org/10.1364/OE.20.015769


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Abstract

Fiber nonlinearity has become a major limiting factor to realize ultra-high-speed optical communications. We propose a fractionally-spaced equalizer which exploits a trained high-order statistics to deal with data-pattern dependent nonlinear impairments in fiber-optic communications. The computer simulation reveals that the proposed 3-tap equalizer improves Q-factor by more than 2 dB for long-haul transmissions of 5,230 km distance and 40 Gbps data rate. We also demonstrate that the joint use of a digital backpropagation (DBP) and the proposed equalizer offers an additional 1–2 dB performance improvement due to the channel shortening gain. A performance in high-speed transmissions of 100 Gbps and beyond is evaluated as well.

© 2012 OSA

OCIS Codes
(060.1660) Fiber optics and optical communications : Coherent communications
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: April 12, 2012
Revised Manuscript: June 6, 2012
Manuscript Accepted: June 7, 2012
Published: June 27, 2012

Citation
Toshiaki Koike-Akino, Chunjie Duan, Kieran Parsons, Keisuke Kojima, Tsuyoshi Yoshida, Takashi Sugihara, and Takashi Mizuochi, "High-order statistical equalizer for nonlinearity compensation in dispersion-managed coherent optical communications," Opt. Express 20, 15769-15780 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-14-15769


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