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Development of a compact multipass oxygen sensor used for gas diffusion studies in opaque media

Larsson, Jim LU ; Mei, Liang LU ; Lundin, Patrik LU ; Bood, Joakim LU and Svanberg, Sune LU (2015) In Applied Optics 54(33). p.9772-9778
Abstract
A highly scattering porous ceramic sample is employed as a miniature random-scattering multipass gas cell for monitoring of oxygen content in opaque media, that is, wood materials in the present work. Gas in scattering media absorption spectroscopy is used by employing a 760 nm near-infrared laser diode to probe the absorption of molecular oxygen enclosed in the pores of the ceramic material working as the multipass gas cell, with a porosity of 75%. A path length enhancement of approximately 26 times and a signal-to-noise ratio of about 60 were obtained for the ceramic sample used in this work. The gas sensor was then used in a case study of the gas diffusion in wood materials, namely, oak, spruce, and mahogany samples. Differences... (More)
A highly scattering porous ceramic sample is employed as a miniature random-scattering multipass gas cell for monitoring of oxygen content in opaque media, that is, wood materials in the present work. Gas in scattering media absorption spectroscopy is used by employing a 760 nm near-infrared laser diode to probe the absorption of molecular oxygen enclosed in the pores of the ceramic material working as the multipass gas cell, with a porosity of 75%. A path length enhancement of approximately 26 times and a signal-to-noise ratio of about 60 were obtained for the ceramic sample used in this work. The gas sensor was then used in a case study of the gas diffusion in wood materials, namely, oak, spruce, and mahogany samples. Differences depending on whether gas diffusion was studied longitudinal or radial to the tree annual rings are demonstrated, with very little gas diffusing in the radial direction. We can also observe that the gas diffusion for the densest material-oak-had the fastest diffusion time, and mahogany, which had the lowest density, showed the slowest diffusion time. (C) 2015 Optical Society of America (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Applied Optics
volume
54
issue
33
pages
9772 - 9778
publisher
OSA
external identifiers
  • wos:000364988100018
ISSN
2155-3165
DOI
10.1364/AO.54.009772
language
English
LU publication?
yes
id
8ff6bf50-8f60-4383-b0b1-deab251874cc (old id 8532843)
date added to LUP
2016-01-20 13:27:16
date last changed
2016-04-15 14:58:16
@article{8ff6bf50-8f60-4383-b0b1-deab251874cc,
  abstract     = {A highly scattering porous ceramic sample is employed as a miniature random-scattering multipass gas cell for monitoring of oxygen content in opaque media, that is, wood materials in the present work. Gas in scattering media absorption spectroscopy is used by employing a 760 nm near-infrared laser diode to probe the absorption of molecular oxygen enclosed in the pores of the ceramic material working as the multipass gas cell, with a porosity of 75%. A path length enhancement of approximately 26 times and a signal-to-noise ratio of about 60 were obtained for the ceramic sample used in this work. The gas sensor was then used in a case study of the gas diffusion in wood materials, namely, oak, spruce, and mahogany samples. Differences depending on whether gas diffusion was studied longitudinal or radial to the tree annual rings are demonstrated, with very little gas diffusing in the radial direction. We can also observe that the gas diffusion for the densest material-oak-had the fastest diffusion time, and mahogany, which had the lowest density, showed the slowest diffusion time. (C) 2015 Optical Society of America},
  author       = {Larsson, Jim and Mei, Liang and Lundin, Patrik and Bood, Joakim and Svanberg, Sune},
  issn         = {2155-3165},
  language     = {eng},
  number       = {33},
  pages        = {9772--9778},
  publisher    = {OSA},
  series       = {Applied Optics},
  title        = {Development of a compact multipass oxygen sensor used for gas diffusion studies in opaque media},
  url          = {http://dx.doi.org/10.1364/AO.54.009772},
  volume       = {54},
  year         = {2015},
}