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

R. Kotschau; Hanns-S. Eckhardt; Karl-Friedrich Klein; Klaus Behler; Georg Hillrichs

doi:10.1117/12.478062

1 July 2003 Gas analysis in the UV region using a long-length hollow core waveguide

R. Kotschau, Hanns-S. Eckhardt, Karl-Friedrich Klein, Klaus Behler, Georg Hillrichs

Proceedings Volume 4957, Optical Fibers and Sensors for Medical Applications III; (2003) https://doi.org/10.1117/12.478062
Event: Biomedical Optics, 2003, San Jose, CA, United States

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.

Citation Download Citation

R. Kotschau, Hanns-S. Eckhardt, Karl-Friedrich Klein, Klaus Behler, and Georg Hillrichs "Gas analysis in the UV region using a long-length hollow core waveguide", Proc. SPIE 4957, Optical Fibers and Sensors for Medical Applications III, (1 July 2003); https://doi.org/10.1117/12.478062

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