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Simultaneous detection of molecular oxygen and water vapor in the tissue optical window using tunable diode laser spectroscopy

Persson, Linda LU ; Andersson, Mats LU ; Lewander, Märta LU ; Svanberg, Katarina LU and Svanberg, Sune LU (2008) In Applied Optics 47(12). p.2028-2034
Abstract
We report on a newly developed diode-laser spectroscopic system for gas detection in scattering

media. Two pigtailed diode lasers are used, operating in a wavelength modulation scheme, to

simultaneously detect molecular oxygen at 760 nm and water vapour at 935 nm within the tissue

optical window (600 nm to 1.3 μm). Different modulation frequencies are used to distinguish

between the two wavelengths. No crosstalk can be observed between the gas contents of the two gas

channels. The system is made compact by using a computer board and performing software based

lock-in detection. The noise floor obtained corresponds to an absorption fraction of about 6 · 10−5

for both oxygen and... (More)
We report on a newly developed diode-laser spectroscopic system for gas detection in scattering

media. Two pigtailed diode lasers are used, operating in a wavelength modulation scheme, to

simultaneously detect molecular oxygen at 760 nm and water vapour at 935 nm within the tissue

optical window (600 nm to 1.3 μm). Different modulation frequencies are used to distinguish

between the two wavelengths. No crosstalk can be observed between the gas contents of the two gas

channels. The system is made compact by using a computer board and performing software based

lock-in detection. The noise floor obtained corresponds to an absorption fraction of about 6 · 10−5

for both oxygen and water vapour. The power of the technique is illustrated by preliminary results

from a clinical trial investigating the human sinuses. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Applied Optics
volume
47
issue
12
pages
2028 - 2034
publisher
OSA
external identifiers
  • wos:000255761900010
  • scopus:49949088449
ISSN
2155-3165
DOI
10.1364/AO.47.002028
language
English
LU publication?
yes
id
20061dbc-d1d8-472b-8b62-561e709674e2 (old id 796116)
date added to LUP
2007-12-28 11:27:21
date last changed
2017-01-01 05:05:59
@article{20061dbc-d1d8-472b-8b62-561e709674e2,
  abstract     = {We report on a newly developed diode-laser spectroscopic system for gas detection in scattering<br/><br>
media. Two pigtailed diode lasers are used, operating in a wavelength modulation scheme, to<br/><br>
simultaneously detect molecular oxygen at 760 nm and water vapour at 935 nm within the tissue<br/><br>
optical window (600 nm to 1.3 μm). Different modulation frequencies are used to distinguish<br/><br>
between the two wavelengths. No crosstalk can be observed between the gas contents of the two gas<br/><br>
channels. The system is made compact by using a computer board and performing software based<br/><br>
lock-in detection. The noise floor obtained corresponds to an absorption fraction of about 6 · 10−5<br/><br>
for both oxygen and water vapour. The power of the technique is illustrated by preliminary results<br/><br>
from a clinical trial investigating the human sinuses.},
  author       = {Persson, Linda and Andersson, Mats and Lewander, Märta and Svanberg, Katarina and Svanberg, Sune},
  issn         = {2155-3165},
  language     = {eng},
  number       = {12},
  pages        = {2028--2034},
  publisher    = {OSA},
  series       = {Applied Optics},
  title        = {Simultaneous detection of molecular oxygen and water vapor in the tissue optical window using tunable diode laser spectroscopy},
  url          = {http://dx.doi.org/10.1364/AO.47.002028},
  volume       = {47},
  year         = {2008},
}