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

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

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    Abstract

    We formulate a semiconductor laser rate equationbased approach to carrier recovery in a Bayesian filtering framework. Filter stability and the effect of model inaccuracies (unknown or un-useable 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
    JournalJournal of Lightwave Technology
    Volume33
    Issue number15
    Pages (from-to)3271-3279
    ISSN0733-8724
    DOIs
    Publication statusPublished - 2015

    Keywords

    • Phase estimation
    • Phase noise
    • Diode lasers
    • Semiconductor lasers
    • Coherent communication
    • Optical communication
    • Quadrature amplitude modulation

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