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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 7, Iss. 3 — Feb. 29, 2012

Detailed calculation of hydroxyl (OH) radical two-photon absorption via broadband ultrafast excitation

Hans U. Stauffer, Sukesh Roy, Waruna D. Kulatilaka, and James R. Gord  »View Author Affiliations


JOSA B, Vol. 29, Issue 1, pp. 40-52 (2012)
http://dx.doi.org/10.1364/JOSAB.29.000040


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Abstract

The theoretical framework for calculation of two-photon absorption cross sections for intermediate Hund’s cases (a) and (b) diatomic species is described in detail and applied toward the hydroxyl (OH) radical. Analytical expressions are derived for the 20 rotational branches that are present in the two-photon A Σ + 2 X Π 2 electronic transition. Calculation of the corresponding line strengths is necessary to permit accurate relative-concentration measurements obtained from the fluorescence induced by a broadband femtosecond excitation pulse. We demonstrate, in particular, that consideration of the temperature-dependent initial-state populations of OH is necessary to obtain accurate relative concentrations from observed two-photon-excitation based laser-induced-fluorescence measurements.

© 2011 Optical Society of America

OCIS Codes
(280.1740) Remote sensing and sensors : Combustion diagnostics
(300.2530) Spectroscopy : Fluorescence, laser-induced
(300.6410) Spectroscopy : Spectroscopy, multiphoton
(320.7090) Ultrafast optics : Ultrafast lasers
(320.7150) Ultrafast optics : Ultrafast spectroscopy

ToC Category:
Spectroscopy

History
Original Manuscript: July 12, 2011
Revised Manuscript: October 16, 2011
Manuscript Accepted: October 17, 2011
Published: December 9, 2011

Virtual Issues
Vol. 7, Iss. 3 Virtual Journal for Biomedical Optics

Citation
Hans U. Stauffer, Sukesh Roy, Waruna D. Kulatilaka, and James R. Gord, "Detailed calculation of hydroxyl (OH) radical two-photon absorption via broadband ultrafast excitation," J. Opt. Soc. Am. B 29, 40-52 (2012)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=josab-29-1-40


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