Analysis and optimization of coupling to external cavities in feedback experiments with vertical-cavity surface-emitting lasers

K.F. Jentsch, M. Sondermann, T. Ackemann

Research output: Contribution to journalArticle

Abstract

The feedback strength is a crucial parameter for feedback experiments using semiconductor lasers. In this article, the coupling efficiency of the field of vertical-cavity surface-emitting lasers (VCSELs) to external cavities containing one collimating lens has been analyzed in detail using ABCD-matrix methods. It is found that for a given set of parameters there are two distinct, experimentally realizable positions of the collimating lens which allow for optimal coupling, if the cavity length is sufficiently small. The predictions are verified in experiments using single-transverse-mode VCSELs. The obtained coupling efficiencies exceed 70%.
Original languageEnglish
Pages (from-to)1396-1400
Number of pages4
JournalOptics Communications
Volume281
Issue number6
DOIs
Publication statusPublished - 15 Mar 2008

Keywords

  • vertical-cavity surface-emitting lasers
  • feedback
  • coupling efficiency

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