Fiber optic chemical/environmental sensors based on active coatings

Michael Krihak; Mahmoud R. Shahriari

doi:10.1117/12.221751

29 September 1995 Fiber optic chemical/environmental sensors based on active coatings

Michael Krihak, Mahmoud R. Shahriari

Proceedings Volume 2508, Chemical, Biochemical, and Environmental Fiber Sensors VII; (1995) https://doi.org/10.1117/12.221751
Event: European Symposium on Optics for Environmental and Public Safety, 1995, Munich, Germany

Abstract

Three optically active organic indicators were evaluated for monitoring O₂, dissolved H₂S and CO. By combining a sol-gel coating with porous fiber technology, a fluorescence sensor was developed for oxygen concentrations less than 1 ppm. A second sol-gel material also possessing fluorescence properties was examined for possible H₂S sensing applications. In this instance, the fluorescence of thionin-doped, sol-gel film was quenched upon exposure to ppm-levels of dissolved H₂S. Finally, preliminary results concerning the advancement of a potential CO sensor were initialized by directly absorbing the organometallic indicator onto a porous fiber substrate. Even though the minimum sensitivity was a few percent, these results were encouraging since the complex responded reversibly to CO.

Citation Download Citation

Michael Krihak and Mahmoud R. Shahriari "Fiber optic chemical/environmental sensors based on active coatings", Proc. SPIE 2508, Chemical, Biochemical, and Environmental Fiber Sensors VII, (29 September 1995); https://doi.org/10.1117/12.221751

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