High resolution Fourier-transform mid-infrared spectroscopy using nonlinear interferometers

Jachin Kunz; Chiara Lindner; Simon J. Herr; Sebastian Wolf; Jens Kiessling; Frank Kühnemann

doi:10.1117/12.2650157

8 March 2023 High resolution Fourier-transform mid-infrared spectroscopy using nonlinear interferometers

Jachin Kunz, Chiara Lindner, Simon J. Herr, Sebastian Wolf, Jens Kiessling, Frank Kühnemann

Proceedings Volume 12447, Quantum Sensing, Imaging, and Precision Metrology; 124471A (2023) https://doi.org/10.1117/12.2650157
Event: SPIE Quantum West, 2023, San Francisco, California, United States

Abstract

Nonlinear interferometers based on correlated photon pairs allow mid-infrared spectroscopy by measuring only near-infrared photons with a silicon-based detector, which offers higher detectivities than mid-infrared detectors. Here, we use the nonlinear interferometer not only to determine the transmission of a sample but also for spectral analysis – analogue to classical Fourier transform infrared (FTIR) spectrometers. The Quantum FTIR analyzes the absorption of gas mixtures with high spectral resolution over a broad mid-infrared wavelength range. Improved emission rates of the photon pair source yield sensitivities similar to a classical FTIR despite an extremely low light exposure on the sample.

Conference Presentation

Citation Download Citation

Jachin Kunz, Chiara Lindner, Simon J. Herr, Sebastian Wolf, Jens Kiessling, and Frank Kühnemann "High resolution Fourier-transform mid-infrared spectroscopy using nonlinear interferometers", Proc. SPIE 12447, Quantum Sensing, Imaging, and Precision Metrology, 124471A (8 March 2023); https://doi.org/10.1117/12.2650157

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