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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 23,
  • Issue 1,
  • pp. 159-
  • (2005)

Maximum-Likelihood Optimal-Sampling-Phase Estimation for Ultra-High-Sensitivity Optically Preamplified Duobinary Receivers

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Abstract

This paper describes the demonstration of a novel method for detecting optical duobinary signals. Oversampling in combination with maximum-likelihood estimation-based data processing of the optical-to-electronic converted signal results in a record sensitivity for an optically preamplified receiver. The concept is investigated at 10 Gb/s and allows data recovery at bit-error rates of 1 x 10^-9 and 1 x 10^-3 with a receiver sensitivity of better than -39.5 dBm and an optical signal-to-noise ratio (OSNR) of only 7.8 dB, respectively.

© 2005 IEEE

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