Laser rate equation-based filtering for carrier recovery in characterization and communication

Molly Piels, Miguel Iglesias Olmedo, Weiqi Xue, Xiaodan Pang, Christian Schäffer, Richard Schatz, Gunnar Jacobsen, Idelfonso Tafur Monroy, Jesper Mørk, Sergei Popov, Darko Zibar

Research output: Contribution to journalArticleAcademicpeer-review

13 Citations (Scopus)

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.

Original languageEnglish
Article number7102689
Pages (from-to)3271-3279
Number of pages9
JournalJournal of Lightwave Technology
Volume33
Issue number15
DOIs
Publication statusPublished - 1 Aug 2015
Externally publishedYes

Keywords

  • Coherent communication
  • diode lasers
  • optical communication
  • phase estimation
  • phase noise
  • quadrature amplitude modulation
  • semiconductor lasers

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