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Multimode diode laser correlation spectroscopy using gas-filled porous materials for pathlength enhancement

Lou, Xiutao LU ; Xu, Can LU ; Svanberg, Sune LU and Somesfalean, Gabriel LU (2012) In Applied Physics B 109(3). p.453-460
Abstract
A novel pathlength enhancement approach has been applied in multimode diode laser correlation spectroscopy measurements of gas concentrations. Reference and sample gas cells made of porous polystyrene foam and alumina ceramic, respectively, were employed in proof-of-principle measurements of molecular oxygen. Equivalent pathlengths of 164 and 52 cm were obtained for the reference and sample cells with physical pathlengths of 4 and 1 cm, respectively. With a measurement time of 60 s, a physical-pathlength-integrated sensitivity of 15 ppma <...m was achieved with an enhancement of more than one order of magnitude compared with an open-air setup. Practical application aspects were investigated including gas cell size and light alignment... (More)
A novel pathlength enhancement approach has been applied in multimode diode laser correlation spectroscopy measurements of gas concentrations. Reference and sample gas cells made of porous polystyrene foam and alumina ceramic, respectively, were employed in proof-of-principle measurements of molecular oxygen. Equivalent pathlengths of 164 and 52 cm were obtained for the reference and sample cells with physical pathlengths of 4 and 1 cm, respectively. With a measurement time of 60 s, a physical-pathlength-integrated sensitivity of 15 ppma <...m was achieved with an enhancement of more than one order of magnitude compared with an open-air setup. Practical application aspects were investigated including gas cell size and light alignment tolerance. This generic approach for pathlength enhancement provides advantages in terms of compactness and robustness. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Applied Physics B
volume
109
issue
3
pages
453 - 460
publisher
Springer
external identifiers
  • wos:000312081700011
  • scopus:84876289691
ISSN
0946-2171
DOI
10.1007/s00340-012-5115-5
language
English
LU publication?
yes
id
0a6319b4-1ee5-42fb-86a7-80bb5ffb927f (old id 3372524)
date added to LUP
2013-02-01 12:57:19
date last changed
2017-01-15 03:15:32
@article{0a6319b4-1ee5-42fb-86a7-80bb5ffb927f,
  abstract     = {A novel pathlength enhancement approach has been applied in multimode diode laser correlation spectroscopy measurements of gas concentrations. Reference and sample gas cells made of porous polystyrene foam and alumina ceramic, respectively, were employed in proof-of-principle measurements of molecular oxygen. Equivalent pathlengths of 164 and 52 cm were obtained for the reference and sample cells with physical pathlengths of 4 and 1 cm, respectively. With a measurement time of 60 s, a physical-pathlength-integrated sensitivity of 15 ppma &lt;...m was achieved with an enhancement of more than one order of magnitude compared with an open-air setup. Practical application aspects were investigated including gas cell size and light alignment tolerance. This generic approach for pathlength enhancement provides advantages in terms of compactness and robustness.},
  author       = {Lou, Xiutao and Xu, Can and Svanberg, Sune and Somesfalean, Gabriel},
  issn         = {0946-2171},
  language     = {eng},
  number       = {3},
  pages        = {453--460},
  publisher    = {Springer},
  series       = {Applied Physics B},
  title        = {Multimode diode laser correlation spectroscopy using gas-filled porous materials for pathlength enhancement},
  url          = {http://dx.doi.org/10.1007/s00340-012-5115-5},
  volume       = {109},
  year         = {2012},
}