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Rapid, broadband spectroscopic temperature measurement of CO2 using VIPA spectroscopy

Published

Author(s)

Andrew M. Klose, Gabriel Ycas, Flavio Caldas da Cruz, Daniel I. Maser, Scott Diddams

Abstract

Rapid spectroscopic temperature measurements of a sealed carbon dioxide sample cell were realized with an optical frequency comb combined with a two-dimensional dispersive spectrometer. A supercontinuum laser source based on an erbium mode-locked laser was employed to generate coherent light around 2000 nm (5000 cm-1). The laser was passed through a 12-cm-long cell containing CO2, and the transmitted light was analyzed in a virtually-imaged phased array- (VIPA-) based spectrometer. Broadband spectra spanning more than 100 cm-1 with a spectral resolution of roughly 0.075 cm-1 (2.2 GHz) were acquired with an integration time of 2 ms. The temperature of the CO2 sample was deduced from fitting a modeled spectrum to the line intensities of the experimentally acquired spectrum. Temperature dynamics on the time scale of milliseconds were observed with a temperature resolution of 2.6 K. The spectroscopically-deduced temperatures agreed with temperatures of the sample cell measured with a thermistor. Potential applications of this technique include quantitative measurement of carbon dioxide concentration and temperature dynamics in gas-phase chemical reactions (e.g. combustion), and plasma diagnostics.
Citation
Applied Physics B
Volume
122

Keywords

frequency comb spectroscopy, mid-infrared spectroscopy, temperature measurements, VIPA

Citation

Klose, A. , Ycas, G. , Caldas da Cruz, F. , Maser, D. and Diddams, S. (2016), Rapid, broadband spectroscopic temperature measurement of CO<sub>2</sub> using VIPA spectroscopy, Applied Physics B, [online], https://doi.org/10.1007/s00340-016-6349-4, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=919135 (Accessed May 21, 2024)

Issues

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Created January 27, 2016, Updated October 12, 2021