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Nonlinear interferometers for broadband mid-infrared spectroscopy

: Lindner, Chiara; Wolf, Sebastian; Kießling, Jens; Kühnemann, Frank

Fulltext urn:nbn:de:0011-n-5787684 (4.5 MByte PDF)
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Created on: 10.3.2020

Schunemann, P.G. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Nonlinear Frequency Generation and Conversion: Materials and Devices XIX : 1-6 February 2020, San Francisco, California
Bellingham, WA: SPIE, 2020 (Proceedings of SPIE 11264)
Paper 112641D, 7 pp.
Conference "Nonlinear Frequency Generation and Conversion - Materials and Devices" <19, 2020, San Francisco/Calif.>
Conference Paper, Electronic Publication
Fraunhofer IPM ()
infrared spectroscopy; quantum optics; fourier transform; Parametric Down-Conversion; Nonlinear Interferometer

Mid-Infrared spectroscopy is one of the most important techniques in chemical analysis. However, the detectors for the mid-infrared range suffer from lower specific detectivities in comparison to their visible counterparts, cost more and often require cryogenic cooling. Nonlinear interferometers allow measuring mid-infrared spectra by detecting visible light using the induced coherence effect. In our work, we realize a nonlinear interferometer designed for broadband mid-infrared spectra with high resolution, which is easily tuneable, and in analogy to classical Fourier transform infrared (FTIR) spectrometers requires no additional spectral selection.