Fourier transform infrared spectroscopy with visible light

Nonlinear interferometers allow spectroscopy in the mid-infrared range by detecting correlated visible light, for which non-cooled detectors with higher specific detectivity and lower dark count rates are available. We present a new approach for the registration of spectral information, which combin...

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Bibliographic Details
Published in:Optics express 2020-02, Vol.28 (4), p.4426-4432
Main Authors: Lindner, Chiara, Wolf, Sebastian, Kiessling, Jens, Kühnemann, Frank
Format: Article
Language:English
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Summary:Nonlinear interferometers allow spectroscopy in the mid-infrared range by detecting correlated visible light, for which non-cooled detectors with higher specific detectivity and lower dark count rates are available. We present a new approach for the registration of spectral information, which combines a nonlinear interferometer using non-degenerate spontaneous parametric down-conversion (SPDC) with a Fourier-transform spectroscopy concept. In order to increase the spectral coverage, we use broadband non-collinear SPDC in periodically poled LiNbO . Without the need for spectrally selective detection, continuous spectra with a spectral bandwidth of more than 100 cm are achieved. We demonstrate transmission spectra of a polypropylene sample measured with 6 cm resolution in the spectral range between 3.2 µm to 3.9 µm.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.382351