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Oxygen measurement by multimode diode lasers employing gas correlation spectroscopy

Publiceringsår: 2009
Språk: Engelska
Sidor: 990-997
Publikation/Tidskrift/Serie: Applied Optics
Volym: 48
Nummer: 5
Dokumenttyp: Artikel
Förlag: Optical Society of America


Multimode diode laser (MDL)-based correlation spectroscopy (COSPEC) was used to measure oxygen in ambient air, thereby employing a diode laser (DL) having an emission spectrum that overlaps the oxygen absorption lines of the A band. A sensitivity of 700 ppm m was achieved with good accuracy (2%) and linearity (R-2 = 0.999). For comparison, measurements of ambient oxygen were also performed by tunable DL absorption spectroscopy (TDLAS) technique employing a vertical cavity surface emitting laser. We demonstrate that, despite slightly degraded sensitivity, the MDL-based COSPEC-based oxygen sensor has the advantages of high stability, low cost, ease-of-use, and relaxed requirements in component selection and instrument buildup compared with the TDLAS-based instrument. (C) 2009 Optical Society of America



  • Atom and Molecular Physics and Optics


  • ISSN: 0003-6935

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