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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. 6, Iss. 9 — Oct. 3, 2011

Gas spectroscopy and optical path-length assessment in scattering media using a frequency-modulated continuous-wave diode laser

Liang Mei, Hiran Jayaweera, Patrik Lundin, Sune Svanberg, and Gabriel Somesfalean  »View Author Affiliations


Optics Letters, Vol. 36, Issue 16, pp. 3036-3038 (2011)
http://dx.doi.org/10.1364/OL.36.003036


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Abstract

Simultaneous assessment of the spectroscopic absorption signal of gas enclosed in a scattering medium and the corresponding optical path length of the probing light is demonstrated using a single setup. Sensitive gas absorption measurements are performed by a tunable diode laser using wavelength-modulation spectroscopy, while the path length is evaluated by the frequency-modulated cw technique commonly used in the field of telecommunication. Proof-of-principle measurements are demonstrated with water vapor as the absorbing gas and using polystyrene foam as an inhomogeneously scattering medium. The combination of these techniques opens up new possibilities for straightforward evaluation of gas presence and exchange in scattering media.

© 2011 Optical Society of America

OCIS Codes
(290.4210) Scattering : Multiple scattering
(300.1030) Spectroscopy : Absorption

ToC Category:
Scattering

History
Original Manuscript: June 7, 2011
Revised Manuscript: July 8, 2011
Manuscript Accepted: July 14, 2011
Published: August 5, 2011

Virtual Issues
Vol. 6, Iss. 9 Virtual Journal for Biomedical Optics

Citation
Liang Mei, Hiran Jayaweera, Patrik Lundin, Sune Svanberg, and Gabriel Somesfalean, "Gas spectroscopy and optical path-length assessment in scattering media using a frequency-modulated continuous-wave diode laser," Opt. Lett. 36, 3036-3038 (2011)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-36-16-3036


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