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Title:Speed-dependent Voigt Lineshape Parameter Database Using Dual Frequency Comb Laser Absorption Measurements Of Pure And Air-broadened H2o From 6656-7540 Cm−1 Up To 1100 K
Author(s):Egbert, Scott C
Contributor(s):Rieker, Gregory B; Drouin, Brian; Coburn, Sean; Sung, Keeyoon; Yun, David; Malarich, Nathan A
Abstract:We present broadband dual frequency comb laser measurements of pure and air-broadened H$_{2}$O absorption from 6656 to 7540 cm$^{-1}$ (1326-1502 nm) with a spectral point spacing of 0.0068 cm$^{-1}$. Sample pressure and temperature were carefully controlled for each of the 56 datasets collected, with measured temperatures between 300 and 1100 K and pressures ranging from 0.5 to 16 Torr and 20 to 600 Torr for the pure H$_{2}$O and 2\% H$_{2}$O in air, respectively. We employ a multispectrum fitting routine based on the quadratic speed-dependent Voigt profile to extract self- and air-broadening and shift parameters, along with corresponding power-law temperature dependence exponents for the thousands of visible absorption features. These results are then compared against existing high temperature H$_{2}$O linelists. \vspace{-2mm} \begin{center} \includegraphics[scale=0.78]{mini.eps} \end{center} \vspace{-15mm}
Issue Date:2021-06-22
Publisher:International Symposium on Molecular Spectroscopy
Genre:Conference Paper / Presentation
Date Available in IDEALS:2021-09-24

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