High sensitivity trace gas detection by cantilever-enhanced photoacoustic spectroscopy using a mid-infrared continuous-wave optical parametric oscillator

Highly sensitive cantilever-enhanced photoacoustic detection of hydrogen cyanide and methane in the mid-infrared region is demonstrated. A mid-infrared continuous-wave frequency tunable optical parametric oscillator was used as a light source in the experimental setup. Noise equivalent detection lim...

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Veröffentlicht in:	Optics express 2013-04, Vol.21 (8), p.10240-10250
Hauptverfasser:	Peltola, Jari, Vainio, Markku, Hieta, Tuomas, Uotila, Juho, Sinisalo, Sauli, Metsälä, Markus, Siltanen, Mikael, Halonen, Lauri
Format:	Artikel
Sprache:	eng
Schlagworte:	Equipment Design Equipment Failure Analysis Gases - analysis Gases - chemistry Micro-Electrical-Mechanical Systems - instrumentation Microchemistry - instrumentation Oscillometry - instrumentation Photoacoustic Techniques - instrumentation Spectrophotometry, Infrared - instrumentation
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	Highly sensitive cantilever-enhanced photoacoustic detection of hydrogen cyanide and methane in the mid-infrared region is demonstrated. A mid-infrared continuous-wave frequency tunable optical parametric oscillator was used as a light source in the experimental setup. Noise equivalent detection limits of 190 ppt (1 s) and 65 ppt (30 s) were achieved for HCN and CH(4), respectively. The normalized noise equivalent absorption coefficient is 1.8 × 10(-9) W cm(-1) Hz(-1/2).
ISSN:	1094-4087 1094-4087
DOI:	10.1364/OE.21.010240