Experimental demonstration of the maximum likelihood-based chromatic dispersion estimator for coherent receivers

Robert Borkowski, Pontus Johannisson, Henk Wymeersch, Valeria Arlunno, Antonio Caballero Jambrina, Darko Zibar, Idelfonso Tafur Monroy

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Abstract

We perform an experimental investigation of a maximum likelihood-based (ML-based) algorithm for bulk chromatic dispersion estimation for digital coherent receivers operating in uncompensated optical networks. We demonstrate the robustness of the method at low optical signal-to-noise ratio (OSNR) and against differential group delay (DGD) in an experiment involving 112Gbit/s polarization-division multiplexed (PDM) 16-ary quadrature amplitude modulation (16QAM) and quaternary phase-shift keying (QPSK).
Original languageEnglish
JournalOptical Fiber Technology
Volume20
Issue number2
Pages (from-to)158-162
ISSN1068-5200
DOIs
Publication statusPublished - 2014

Keywords

  • Chromatic dispersion
  • Optical performance monitoring
  • Maximum likelihood
  • Digital signal processing
  • 16QAM
  • QPSK

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