• DocumentCode
    807828
  • Title

    Oxygen sensing using single frequency GaAs-AlGaAs DFB laser diodes and VCSELs

  • Author

    Weldon, V. ; O´Gorman, J. ; Pérez-Camacho, J.J. ; Hegarty, J.

  • Author_Institution
    Dept. of Phys., Trinity Coll., Dublin, Ireland
  • Volume
    32
  • Issue
    3
  • fYear
    1996
  • fDate
    2/1/1996 12:00:00 AM
  • Firstpage
    219
  • Lastpage
    221
  • Abstract
    Oxygen detection using a GaAs-AlGaAs distributed feedback laser diode emitting at a wavelength of 761 nm is demonstrated for the first time. Using wavelength modulation spectroscopy with harmonic detection the authors have achieved a detection limit of 20 ppm.m with a lock-in amplifier time constant of 33.3 ms. The first results comparing the relative merits of VCSELs and DFB laser diodes for sensing applications are also shown
  • Keywords
    III-V semiconductors; aluminium compounds; distributed feedback lasers; gallium arsenide; gas sensors; modulation spectroscopy; oxygen; semiconductor lasers; spectrochemical analysis; surface emitting lasers; 761 nm; DFB laser diodes; GaAs-AlGaAs; O2; VCSELs; harmonic detection; lock-in amplifier time constant; oxygen sensing; single frequency lasers; wavelength modulation spectroscopy;
  • fLanguage
    English
  • Journal_Title
    Electronics Letters
  • Publisher
    iet
  • ISSN
    0013-5194
  • Type

    jour

  • DOI
    10.1049/el:19960169
  • Filename
    490812
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=807828