Nonlinear interferometer for Fourier-transform mid-infrared gas spectroscopy using near-infrared detection
Abstract
Nonlinear interferometers allow for mid-infrared spectroscopy with near-infrared detection using correlated photons. Previous implementations have demonstrated a spectral resolution limited by spectrally selective detection. In our work, we demonstrate mid-infrared transmission spectroscopy in a nonlinear interferometer using single-pixel near-infrared detection and Fourier-transform analysis. A sub-wavenumber spectral resolution allows for rotational-line-resolving spectroscopy of gaseous samples in a spectral bandwidth of over 700cm. We use methane transmission spectra around 3.3m wavelength to characterize the spectral resolution, noise limitations and transmission accuracy of our device. The combination of nonlinear interferometry and Fourier-transform analysis paves the way towards performant and efficient mid-infrared spectroscopy with near-infrared detection.
Cite
@article{arxiv.2011.09764,
title = {Nonlinear interferometer for Fourier-transform mid-infrared gas spectroscopy using near-infrared detection},
author = {Chiara Lindner and Jachin Kunz and Simon J. Herr and Sebastian Wolf and Jens Kiessling and Frank Kühnemann},
journal= {arXiv preprint arXiv:2011.09764},
year = {2021}
}
Comments
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