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

Jari Peltola; Markku Vainio; Tuomas Hieta; Juho Uotila; Sauli Sinisalo; Markus Metsälä; Mikael Siltanen; Lauri Halonen

doi:10.1364/OE.21.010240

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

Opt Express. 2013 Apr 22;21(8):10240-50. doi: 10.1364/OE.21.010240.

Authors

Jari Peltola¹, Markku Vainio, Tuomas Hieta, Juho Uotila, Sauli Sinisalo, Markus Metsälä, Mikael Siltanen, Lauri Halonen

Affiliation

¹ Laboratory of Physical Chemistry, Department of Chemistry, P.O. Box 55 (A.I. Virtasen aukio 1), FIN-00014 University of Helsinki, Finland.

PMID: 23609733
DOI: 10.1364/OE.21.010240

Abstract

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).

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Equipment Design
Equipment Failure Analysis
Gases / analysis*
Gases / chemistry
Micro-Electrical-Mechanical Systems / instrumentation*
Microchemistry / instrumentation*
Oscillometry / instrumentation*
Photoacoustic Techniques / instrumentation*
Spectrophotometry, Infrared / instrumentation*

Substances

Gases