Open AccessHigh sensitivity trace gas detection by cantilever-enhanced photoacoustic spectroscopy using a mid-infrared continuous-wave optical parametric oscillator
Author(s) -
Jari Peltola,
Markku Vainio,
Tuomas Hieta,
Juho Uotila,
Sauli Sinisalo,
Markus Metsälä,
Mikael Siltanen,
Lauri Halonen
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.010240
Subject(s) - photoacoustic spectroscopy , optics , optical parametric oscillator , materials science , infrared , attenuation coefficient , trace gas , noise (video) , spectroscopy , sensitivity (control systems) , absorption (acoustics) , analytical chemistry (journal) , laser , physics , chemistry , chromatography , quantum mechanics , artificial intelligence , electronic engineering , meteorology , computer science , image (mathematics) , engineering
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).