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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 18 — Sep. 3, 2007
  • pp: 11750–11755

Post-detection nonlinear distortion for efficient MLSD in optical links

M. Franceschini, G. Ferrari, R. Raheli, F. Meli, and A. Castoldi  »View Author Affiliations

Optics Express, Vol. 15, Issue 18, pp. 11750-11755 (2007)

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In this paper, we investigate the use of nonlinear distortion of the electrical post-detection signal in order to design simple, yet very effective, maximum likelihood sequence detection (MLSD) receivers for optical communications with direct photo-detection. This distortion enables the use of standard Euclidean branch metrics in the Viterbi algorithm which implements MLSD. Our results suggest that the nonlinear characteristic can be optimized with respect to the uncompensated chromatic dispersion and other relevant system parameters, such as the extinction ratio. The proposed schemes with optimized distortion exhibit the same performance of more sophisticated MLSD schemes, still guaranteeing more efficient Viterbi algorithm implementation.

© 2007 Optical Society of America

OCIS Codes
(060.4510) Fiber optics and optical communications : Optical communications

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: March 7, 2007
Revised Manuscript: April 19, 2007
Manuscript Accepted: April 30, 2007
Published: August 30, 2007

M. Franceschini, G. Ferrari, R. Raheli, F. Meli, and A. Castoldi, "Post-detection nonlinear distortion for efficient MLSD in optical links," Opt. Express 15, 11750-11755 (2007)

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