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Proceedings Paper

Gas analysis in the UV region using a long-length hollow core waveguide
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Paper Abstract

In the DUV-region and MIR-region, the so-called Hollow-Core-Waveguide is an alternative for light-delivery systems, because flexible silica-based fibers are no lnoger useable due to the high intrinsic absorption of silica. In additionl to light-transportation, only the HCW can be used as an intrinsic sensor: due to the long path-length through the HCW with similar intensity profiles at the input and output, the spectral absorption of the gas under test can easily be monitored. Up to now, the gases are analyzed in the MIR-region, mainly. However, the UV-region offers a lot of advantages. Using commercially available components for the UV-light source and the detector-system, the whole system with UV hollow-core-waveguides has to be studied in the wavelength-region from 170 nm up to 350 nm. With this experimental system, it is obvious to observe the UV-absorption of air and carbon dioxide below 200 nm, using nitrogen as a reference gas. In addition, ozone generated by the deuterium-lamp itself and several gas mixtures (e.g. 2 ppm toluene or xylene in cabon dioxide) were studied in detail.

Paper Details

Date Published: 1 July 2003
PDF: 8 pages
Proc. SPIE 4957, Optical Fibers and Sensors for Medical Applications III, (1 July 2003); doi: 10.1117/12.478062
Show Author Affiliations
R. Kotschau, Univ. of Applied Sciences Giessen-Friedberg (Germany)
Hanns-S. Eckhardt, Univ. of Applied Sciences Giessen-Friedberg (Germany)
Karl-Friedrich Klein, Univ. of Applied Sciences Giessen-Friedberg (Germany)
Klaus Behler, Univ. of Applied Sciences Giessen-Friedberg (Germany)
Georg Hillrichs, Univ. of Applied Sciences Merseburg (Germany)

Published in SPIE Proceedings Vol. 4957:
Optical Fibers and Sensors for Medical Applications III
Israel Gannot, Editor(s)

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