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5 March 2021 Time-resolved mid-Infrared dual-comb absorption and dispersion spectroscopy of methane and ethane: towards plasma applications
Muhammad Ali Abbas, Luuk van Dijk, Khalil Eslami Jahromi, Mohammadreza Nematollahi, Frans J.M. Harren, Amir Khodabakhsh
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Proceedings Volume 11671, Real-time Measurements, Rogue Phenomena, and Single-Shot Applications VI; 116710G (2021) https://doi.org/10.1117/12.2582716
Event: SPIE LASE, 2021, Online Only
Abstract
Broadband time resolved absorption and dispersion spectroscopy using a conventional Fourier transform spectroscopy is often a challenging task due to very long measurement times. Here, we present time resolved mid-infrared dual-comb absorption and dispersion spectroscopy of methane and ethane under electrical discharge, covering a spectral bandwidth of 2850-3150 cm-1, with spectral resolution of 5 GHz and temporal resolution of 20 µs. This new approach enabled the direct measure of broadband complex refractive index of materials involved in plasma, which is an indication of plasma density.
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Muhammad Ali Abbas, Luuk van Dijk, Khalil Eslami Jahromi, Mohammadreza Nematollahi, Frans J.M. Harren, and Amir Khodabakhsh "Time-resolved mid-Infrared dual-comb absorption and dispersion spectroscopy of methane and ethane: towards plasma applications", Proc. SPIE 11671, Real-time Measurements, Rogue Phenomena, and Single-Shot Applications VI, 116710G (5 March 2021); https://doi.org/10.1117/12.2582716
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KEYWORDS
Spectroscopy
Absorption
Methane
Mid-IR
Absorption spectroscopy
Plasma
Time resolved spectroscopy
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