Broadband photoacoustic spectroscopy of CH414 with a high-power mid-infrared optical frequency comb

Juho Karhu, Teemu Tomberg, Francisco Senna Vieira, Guillaume Genoud, Vesa Hänninen, Markku Vainio, Markus Metsälä, Tuomas Hieta, Steven Bell, Lauri Halonen (Corresponding Author)

    Research output: Contribution to journalArticleScientificpeer-review

    7 Citations (Scopus)

    Abstract

    We report a photoacoustic spectroscopy setup with a high-power mid-infrared frequency comb as the light source. The setup is used in broadband spectroscopy of radiocarbon methane. Owing to the high sensitivity of a cantilever-enhanced photoacoustic cell and the high-power light source, we can reach a detection limit below 100x00A0;ppb in a broadband measurement with a sample volume of only a few milliliters. The first infrared spectrum of CH414 is reported and given a preliminary assignment. The results lay a foundation for the development of optical detection systems for radiocarbon methane.
    Original languageEnglish
    Pages (from-to)1142-1145
    Number of pages4
    JournalOptics Letters
    Volume44
    Issue number5
    DOIs
    Publication statusPublished - 1 Mar 2019
    MoE publication typeNot Eligible

    Keywords

    • Frequency combs
    • Isotope shifts
    • Optical detection
    • Periodically poled lithium niobate
    • Photoacoustic spectroscopy
    • Power spectral density

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