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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 33,
  • Issue 15,
  • pp. 3271-3279
  • (2015)

Laser Rate Equation-Based Filtering for Carrier Recovery in Characterization and Communication

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Abstract

We formulate a semiconductor laser rate equation-based approach to carrier recovery in a Bayesian filtering framework. Filter stability and the effect of model inaccuracies (unknown or unuseable rate equation coefficients) are discussed. Two potential application areas are explored: Laser characterization and carrier recovery in coherent communication. Two rate equation-based Bayesian filters, the particle filter and extended Kalman filter, are used in conjunction with a coherent receiver to measure frequency noise spectrum of a photonic crystal cavity laser with less than 20 nW of fiber-coupled output power. The extended Kalman filter is also used to recover a 28-GBd DP-16 QAM signal where a decision-directed phase-locked loop fails.

© 2015 IEEE

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