Cavity-enhanced absorption spectroscopy with a rapidly swept diode laser

Cavity-enhanced absorption spectroscopy with a rapidly swept diode laser

Cavity-enhanced absorption spectroscopy is explained in terms of the transmission function of a rapidly swept interferometer, and the integrated transmission is shown to be proportional to the cavity ringdown time. The technique is demonstrated on the b*Sg -X*Sg (1,0) band in molecular oxygen at 687...

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Veröffentlicht in:Applied physics. B, Lasers and optics Lasers and optics, 2002-11, Vol.75 (6-7), p.745-750
Hauptverfasser: BAKOWSKI, B, CORNER, L, HANCOCK, G, KOTCHIE, R, PEVERALL, R, RITCHIE, G. A. D
Format: Artikel
Sprache:eng
Schlagworte:
Absorption spectroscopy
Biological and medical applications
Cavity ringdown
Diode lasers
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Holes
Interferometers
Laser spectroscopy
Lasers
Optics
Physics
Scanning
Semiconductor lasers
laser diodes
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Beschreibung
Zusammenfassung:Cavity-enhanced absorption spectroscopy is explained in terms of the transmission function of a rapidly swept interferometer, and the integrated transmission is shown to be proportional to the cavity ringdown time. The technique is demonstrated on the b*Sg -X*Sg (1,0) band in molecular oxygen at 687 nm using a tunable diode laser and a relative-ly high-Q optical cavity (finesse #~4000). A detection limit of 3X10 cm s is achieved for a 0.8 cm scanning range.
ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-002-1026-1