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  4. Accurate, high-resolution dispersive Fourier-transform spectroscopy with undetected photons
 
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2022
Journal Article
Title

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

Abstract
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 106, 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.
Author(s)
Lindner, Chiara  
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Kunz, Jachin  
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Herr, Simon J.  
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Kießling, Jens  
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Wolf, Sebastian  
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Kühnemann, Frank  
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Journal
Optics Continuum
Open Access
DOI
10.1364/OPTCON.449219
Language
English
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Keyword(s)
  • Quantum Imaging

  • Fourier Transform Spectroscopy

  • Optical Coherent Tomography

  • Phase Noise

  • Photons

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