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

    Research output: Contribution to journalArticleScientificpeer-review

    36 Citations (Scopus)

    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 CH4, respectively. The normalized noise equivalent absorption coefficient is 1.8 × 10−9 W cm−1 Hz−1/2.
    Original languageEnglish
    Pages (from-to)10240-10250
    Number of pages10
    JournalOptics Express
    Volume21
    Issue number8
    DOIs
    Publication statusPublished - 2013
    MoE publication typeA1 Journal article-refereed

    Keywords

    • spectroscopy
    • photothermal
    • parametric oscillators
    • laser sensors

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