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Three-level depletion by cavity ringdown absorption spectroscopy : proof of concept

Mazzotti, Fabio J. and Barrios, Lizandra and Raghunandan, Ranjini and Maier, John P.. (2013) Three-level depletion by cavity ringdown absorption spectroscopy : proof of concept. Molecular physics, Vol. 111, H. 2. pp. 335-344.

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Official URL: http://edoc.unibas.ch/dok/A6194505

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Abstract

Theoretical quantitative considerations as well as experimental data are presented based on absorption population depletion coupled with cavity ringdown spectroscopy. The absorbing number densities inside the cavity are determined by numerical integration of the coupled rate equations. The number of photons involved in absorption, cavity losses due to mirror reflectivity and stimulated emission are taken into account. The principle is to monitor a first transition by cavity ringdown spectroscopy while a second transition, with a state in common, is resonantly excited by the decaying radiation of different frequency also trapped inside the optical cavity. A numerical example is given for atomic lines of neon and the measurements carried out in a supersonic slit-jet expansion discharge demonstrate the feasibility of the technique. The technique is also proven to work with two resonant transitions of C2. Translational velocity of the jet modifying the rate equations is included in the model.
Faculties and Departments:05 Faculty of Science > Departement Chemie > Chemie > Physikalische Chemie (Maier)
UniBasel Contributors:Maier, John Paul and Mazzotti, Fabio Jerome and Barrios Herrera, Lizandra and Raghunandan, Ranjini
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Taylor & Francis
ISSN:0026-8976
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:06 Dec 2013 09:35
Deposited On:06 Dec 2013 09:35

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