Compact large-aperture Fabry-Pérot interferometer modules for gas spectroscopy at Mid-IR

Uula Kantojärvi, Aapo Varpula, Tapani Antila, Christer Holmlund, Jussi Mäkynen, Antti Näsilä, Rami Mannila, Anna Rissanen, Jarkko Antila, Rolf J. Disch, Torsten A. Waldmann

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    7 Citations (Scopus)


    VTT has developed Fabry-Pérot Interferometers (FPI) for visible and infrared wavelengths since 90's. Here we present two new platforms for mid-infrared gas spectroscopy having a large optical aperture to provide high optical throughput but still enabling miniaturized instrument size. First platform is a tunable filter that replaces a traditional filter wheel, which operates between wavelengths of 4-5 um. Second platform is for correlation spectroscopy where the interferometer provides a comb-like transmission pattern mimicking absorption of diatomic molecules at the wavelength range of 4.7-4.8 um. The Bragg mirrors have 2-4 thin layers of polysilicon and silicon oxide
    Original languageEnglish
    Title of host publicationPhotonic Instrumentation Engineering
    EditorsYakov G. Soskind, Craig Olson
    PublisherInternational Society for Optics and Photonics SPIE
    Number of pages10
    ISBN (Print)978-0-8194-9905-9
    Publication statusPublished - 2014
    MoE publication typeA4 Article in a conference publication
    EventSPIE Photonics West 2014 - San Francisco, United States
    Duration: 1 Feb 20146 Feb 2014

    Publication series

    SeriesProceedings of SPIE


    ConferenceSPIE Photonics West 2014
    Country/TerritoryUnited States
    CitySan Francisco


    • Fabry-Perot Interferometer
    • gas
    • spectroscopy
    • infrared
    • correlation
    • tunable filter


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