Combined optical porosimetry and gas absorption spectroscopy in gas-filled porous media using diode-laser-based frequency domain photon migration
2012 (English)In: Optics Express, ISSN 1094-4087, Vol. 20, no 15, 16942-16954 p.Article in journal (Refereed) Published
A combination method of frequency domain photon migration (FDPM) and gas in scattering media absorption spectroscopy (GASMAS) is used for assessment of the mean optical path length (MOPL) and the gas absorption in gas-filled porous media, respectively. Polystyrene (PS) foams, with extremely high physical porosity, are utilized as sample materials for proof-of-principle demonstration. The optical porosity, defined as the ratio between the path length through the pores and the path length through the medium, is evaluated in PS foam and found consistent with the measured physical porosity. The method was also utilized for the study of balsa and spruce wood samples.
Place, publisher, year, edition, pages
2012. Vol. 20, no 15, 16942-16954 p.
Combination method, Frequency domain photon migration, Mean optical path length, Path length, Porosimetry, Proof of principles, Scattering media, Spruce wood
Other Physics Topics
IdentifiersURN: urn:nbn:se:kth:diva-104263DOI: 10.1364/OE.20.016942ISI: 000307055800079OAI: oai:DiVA.org:kth-104263DiVA: diva2:565150
FunderSwedish Research Council, 621-2011-4265
QC 201211062012-11-062012-10-312012-11-06Bibliographically approved