Optical and Quantum Electronics

, Volume 42, Issue 11–13, pp 713–719

The effect of facet reflections in index-coupled distributed feedback lasers with coated facets

  • Antti Laakso
  • Jukka Karinen
  • Jarkko Telkkälä
  • Mihail Dumitrescu
Article

Abstract

The effect of facet reflections and different grating parameters on side-mode suppression ratio in index-coupled distributed feedback lasers without a phase-shift section is analyzed. The effect of uncontrollable facet positions on side-mode suppression ratio is studied when the grating coupling coefficient, the grating filling factor, the grating order, the device length and the facet reflectivities are varied. The single-mode device yield and the facet reflectivities needed for achieving a high yield are evaluated, the reflectivity of the anti-reflection coated facet is optimized as a function of the coupling strength and the effect of facet reflections on the other laser characteristics is shown.

Keywords

Distributed feedback lasers Facet phase Facet reflectivity Side-mode suppression ratio Single-mode yield 

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Copyright information

© Springer Science+Business Media, LLC. 2011

Authors and Affiliations

  • Antti Laakso
    • 1
  • Jukka Karinen
    • 1
  • Jarkko Telkkälä
    • 1
  • Mihail Dumitrescu
    • 1
  1. 1.Optoelectronics Research CentreTampere University of TechnologyTampereFinland

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