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2 March 2020 Nonlinear interferometers for broadband mid-infrared spectroscopy
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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 only 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 tunable, and in analogy to classical Fourier transform infrared (FTIR) spectrometers requires no additional spectral selection.
Conference Presentation
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Chiara Lindner, Sebastian Wolf, Jens Kießling, and Frank Kühnemann "Nonlinear interferometers for broadband mid-infrared spectroscopy", Proc. SPIE 11264, Nonlinear Frequency Generation and Conversion: Materials and Devices XIX, 112641D (2 March 2020);

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