TY - JOUR
T1 - Analysis of gas dispersed in scattering media
AU - Sjöholm, M.
AU - Somesfalean, G.
AU - Alnis, J.
AU - Andersson-Engels, S.
AU - Svanberg, S.
PY - 2001/1/1
Y1 - 2001/1/1
N2 - Monitoring of free gas embedded in scattering media, such as wood, fruits, and synthetic materials, is demonstrated by use of diode laser spectroscopy combined with sensitive modulation techniques. Gas detection is made possible by the contrast of the narrow absorptive feature of the free-gas molecules with the slow wavelength dependence of the absorption and scattering cross sections in solids and liquids. An absorption sensitivity of 2.5 × 10-4, corresponding to a 1.25-mm air column, is demonstrated by measurements of dispersed molecular oxygen. These techniques open up new possibilities for characterization and diagnostics, including internal gas pressure and gas-exchange assessment, in organic and synthetic materials.
AB - Monitoring of free gas embedded in scattering media, such as wood, fruits, and synthetic materials, is demonstrated by use of diode laser spectroscopy combined with sensitive modulation techniques. Gas detection is made possible by the contrast of the narrow absorptive feature of the free-gas molecules with the slow wavelength dependence of the absorption and scattering cross sections in solids and liquids. An absorption sensitivity of 2.5 × 10-4, corresponding to a 1.25-mm air column, is demonstrated by measurements of dispersed molecular oxygen. These techniques open up new possibilities for characterization and diagnostics, including internal gas pressure and gas-exchange assessment, in organic and synthetic materials.
UR - https://www.scopus.com/pages/publications/0141791147
U2 - 10.1364/OL.26.000016
DO - 10.1364/OL.26.000016
M3 - Article
AN - SCOPUS:0141791147
SN - 0146-9592
VL - 26
SP - 16
EP - 18
JO - Optics Letters
JF - Optics Letters
IS - 1
ER -