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Nonlinear interferometers for Fourier-transform infrared spectroscopy with visible light

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

Volltext urn:nbn:de:0011-n-6333247 (1004 KByte PDF)
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Erstellt am: 16.4.2021

Schunemann, Peter G. (Hrsg.) ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Nonlinear Frequency Generation and Conversion: Materials and Devices XX : 6-12 March 2021, Online Only, California, United States
Bellingham, WA: SPIE, 2021 (Proceedings of SPIE 11670)
Paper 1167010, 7 S.
Conference "Nonlinear Frequency Generation and Conversion - Materials and Devices" <20, 2021, Online>
Konferenzbeitrag, Elektronische Publikation
Fraunhofer IPM ()
Nonlinear Interferometer; spectroscopy; quantum optics; Mid-IR; SPDC; fourier transform

Nonlinear interferometers based on non-degenerate spontaneous parametric down-conversion (SPDC) create a link between separate spectral ranges. This allows for measurements in remote spectral regions while detecting light in easily accessible wavelengths. In our work, we use periodically poled lithium niobate to create correlated signal (visible or near-infrared) and idler (mid-infrared) photon pairs. Using a nonlinear interferometer in Michelson geometry, we obtain broadband mid-infrared spectra from light detected with a silicon avalanche photodiode. Combining the nonlinear interferometer with a measurement scheme in close analogy to classical Fourier-transform infrared spectroscopy allows for sub-wavenumber spectral resolution, which opens up possibilities for applications such as precise spectroscopic gas analysis.