Accurate, high-resolution dispersive Fourier-transform spectroscopy with undetected photons

We present dispersive Fourier-transform spectroscopy with undetected photons using a nonlinear interferometer based on spontaneous parametric down-conversion. The interferometer transfers mid-infrared information of sample interaction to the near-infrared, which allows using low-noise silicon-based...

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Bibliographic Details
Published in:Optics continuum 2022-02, Vol.1 (2), p.189
Main Authors: Lindner, Chiara, Kunz, Jachin, Herr, Simon J., Kiessling, Jens, Wolf, Sebastian, Kühnemann, Frank
Format: Article
Language:English
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Summary:We present dispersive Fourier-transform spectroscopy with undetected photons using a nonlinear interferometer based on spontaneous parametric down-conversion. The interferometer transfers mid-infrared information of sample interaction to the near-infrared, which allows using low-noise silicon-based detectors, enabling accurate measurements with extremely low light exposure. We demonstrate a dispersion measurement of gaseous methane with an accuracy greater than 1 part in 10 6 , which is limited by random phase noise. The Fourier-transform approach allows high resolution, rotational-line resolving spectroscopy of both, the absorptive and dispersive properties of a sample in a simple and robust measurement concept.
ISSN:2770-0208
2770-0208
DOI:10.1364/OPTCON.449219