Design optimisation for high-power high-brightness parabolic bow-tie laser diodes

D. Masanotti, F. Causa, J. Sarma

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Optical sources that combine high power with high brightness are in great demand for various applications. Although sophisticated device designs have been demonstrated to have such desirable characteristics, in order to contain the device costs, tapered geometry devices seem to provide attractive alternatives. Furthermore, particularly for high-power operation, the bow-tie configuration is effective for further reducing the risk of catastrophic optical damage and for obtaining a good quality output beam. The authors present the detailed analysis that has been necessary to optimise both the material layer structure and the tapered laser geometry to achieve simultaneously high power and high brightness. Following the design guidelines, several 980 nm parabolic bow-tie lasers have been fabricated and characterised in-house, obtaining output powers in excess of 700 mW per facet in a diffraction-limited (2.7/spl deg/) beam measured without the use of external lenses.
Original languageEnglish
Pages (from-to)537-541
Number of pages5
JournalIEE Proceedings - Circuits Devices and Systems
Volume150
Issue number6
DOIs
Publication statusPublished - 2003

Keywords

  • tapered laser geometry
  • output beam quality
  • semiconductor lasers
  • material layer structure
  • 980 nm
  • device designs
  • bow-tie configuration
  • 700 mW
  • output powers
  • diffraction-limited beam
  • semiconductor device reliability
  • catastrophic optical damage risk
  • brightness
  • semiconductor device testing
  • design engineering
  • 2.7/spl deg/
  • tapered geometry devices
  • design optimisation
  • optical sources
  • high-power high-brightness parabolic bow-tie laser diodes
  • optical design techniques
  • design guidelines
  • device costs
  • optimisation

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