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Gas spectroscopy and optical path-length assessment in scattering media using a frequency-modulated continuous-wave diode laser
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2011 (English)In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 36, no 16, 3036-3038 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2011. Vol. 36, no 16, 3036-3038 p.
Keyword [en]
DOMAIN REFLECTOMETRY, ABSORPTION, SENSORS, OXYGEN
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:kth:diva-39021DOI: 10.1364/OL.36.003036ISI: 000293890800007OAI: oai:DiVA.org:kth-39021DiVA: diva2:439129
Funder
Swedish Research Council
Available from: 2011-09-06 Created: 2011-09-06 Last updated: 2017-12-08Bibliographically approved

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Somesfalean, Gabriel
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School of Information and Communication Technology (ICT)
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