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Title:Dual Wavelength Cavity Ringdown Spectroscopy For High Precision Methane Isotope Ratio Measurements
Author(s):Bui, Thinh Quoc
Contributor(s):Okumura, Mitchio; Chen, Pin; Hogan, Daniel; Shen, Linhan
Subject(s):Instrument/Technique Demonstration
Abstract:We demonstrate a frequency stabilized cavity ringdown spectrometer capable of measuring simultaneous isotopes of methane (\chem{^{12}CH_4}, \chem{^{13}CH_4}, \chem{^{12}CH_3D}) of enriched samples to high precision ($\delta$D$\textless$0.03$\%$ and $\delta$13C$\textless$0.01$\%$). The spectrometer employs coupling of two orthogonally polarized CW lasers into a ringdown cavity for simultaneous spectral measurements over the full wavelength range of 1.45-1.65$\mu$m. In addition, we discuss the necessity of modeling methane lineshapes with the Galatry profile to achieve the highest precision.
Issue Date:2014-06-17
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:Bui, T.Q.; Okumura, M.; Chen, P.; Hogan, D.; Shen, L. DUAL WAVELENGTH CAVITY RINGDOWN SPECTROSCOPY FOR HIGH PRECISION METHANE ISOTOPE RATIO MEASUREMENTS. Proceedings of the International Symposium on Molecular Spectroscopy, Urbana, IL, June 16-21, 2014. DOI: 10.15278/isms.2014.TJ10
Genre:CONFERENCE PAPER/PRESENTATION
Type:Text
Language:English
URI:http://hdl.handle.net/2142/51077
DOI:10.15278/isms.2014.TJ10
Rights Information:Copyright 2014 by the authors. Licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/
Date Available in IDEALS:2014-09-17
2015-04-14


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