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5 March 2021 Multi-species trace gas detection using a mid-infrared supercontinuum source and a fast-scanning Fourier transform spectrometer
Frans J. Harren, Khalil Eslami Jahromi, Roderik Krebbers, Amir Khodabakhsh, Mohammedreza Nematollahi
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Proceedings Volume 11685, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XIV; 116850E (2021) https://doi.org/10.1117/12.2582721
Event: SPIE OPTO, 2021, Online Only
Abstract
We present a multi-species trace gas sensor based on a broadband mid-infrared supercontinuum source and a compact home-built Fourier Transform Spectrometer with a balanced detection scheme. The gas sensor provides a spectral resolution of 1 GHz in the wavelength range of 2.4-4.2 µm. Using a global fitting routine, we are able to retrieve the concentrations of different species in complex gas mixtures, achieving detection sensitivities in the order of 100 ppbv.Hz-1/2 (4s measurement time). We used the sensor to measure volatiles from fruit (apples, pears) under storage conditions, demonstrating its potential for monitoring fruit in commercial storage facilities.
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Frans J. Harren, Khalil Eslami Jahromi, Roderik Krebbers, Amir Khodabakhsh, and Mohammedreza Nematollahi "Multi-species trace gas detection using a mid-infrared supercontinuum source and a fast-scanning Fourier transform spectrometer", Proc. SPIE 11685, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XIV, 116850E (5 March 2021); https://doi.org/10.1117/12.2582721
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KEYWORDS
Fourier transforms
Mid-IR
Spectroscopy
Supercontinuum sources
Absorption
Gases
Sensors
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