TY - JOUR
T1 - Evanescent field IR spectroscopy using optical fibres and tunable diode lasers
AU - Schnitzer, I.
AU - Katzir, A.
AU - Schiessl, U.
AU - Riedel, W. J.
AU - Tacke, M.
N1 - Funding Information:
This work was partially supported by the German Ministry for Research and Technology.
PY - 1990/1
Y1 - 1990/1
N2 - A new technique for IR spectroscopic measurements of liquids, pastes and thin films is reported. The technique is based on the evanescent field absorption occurring when the material forming the cladding of a waveguide absorbs light at the wavelength being transmitted. The spectroscopic system, consisting of an IR tunable diode laser source and an unclad multimode IR fibre, is described. Design considerations, theoretical predictions and experimental verification of the sensor performance are presented. This sensor has a relatively high sensitivity, and it will be very useful for monitoring and controlling concentrations and chemical transformations of liquids and pastes in situ and in real time.
AB - A new technique for IR spectroscopic measurements of liquids, pastes and thin films is reported. The technique is based on the evanescent field absorption occurring when the material forming the cladding of a waveguide absorbs light at the wavelength being transmitted. The spectroscopic system, consisting of an IR tunable diode laser source and an unclad multimode IR fibre, is described. Design considerations, theoretical predictions and experimental verification of the sensor performance are presented. This sensor has a relatively high sensitivity, and it will be very useful for monitoring and controlling concentrations and chemical transformations of liquids and pastes in situ and in real time.
UR - http://www.scopus.com/inward/record.url?scp=0025207417&partnerID=8YFLogxK
U2 - 10.1016/0921-5107(90)90079-Q
DO - 10.1016/0921-5107(90)90079-Q
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AN - SCOPUS:0025207417
SN - 0921-5107
VL - 5
SP - 333
EP - 337
JO - Materials Science and Engineering B
JF - Materials Science and Engineering B
IS - 2
ER -