Planar optical sensor for trichlorofluoromethane

Maiko Girschikofsky; Dimitrij Ryvlin; Steffen Hessler; Siegfried R. Waldvogel; Ralf Hellmann

doi:10.1117/12.2542013

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12 November 2019 Planar optical sensor for trichlorofluoromethane

Maiko Girschikofsky, Dimitrij Ryvlin, Steffen Hessler, Siegfried R. Waldvogel, Ralf Hellmann

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Proceedings Volume 11197, SPIE Future Sensing Technologies; 111970E (2019) https://doi.org/10.1117/12.2542013
Event: SPIE Future Sensing Technologies, 2019, Tokyo, Japan

Abstract

We demonstrate a planar-optical Bragg grating based chemical sensor device for the detection of the environmentally harmful, highly ozone-depleting-substance trichlorofluoromethane. By applying an approximately 100 nm thin layer of differently substituted cyclodextrin-derivatives on top of the sensitive region of the silica-based Bragg grating sensor, supramolecular host-guest interactions of the oligo-saccharide affinity material and the chlorofluorocarbon analyte are favored, leading to a significant increase of the sensitivity towards the airborne pollutant. The all-optical sensor thus allows a reliable online in-situ detection and measurement of trichlorofluoromethane in real-time that features a limit of detection of down to 25 ppm.

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Maiko Girschikofsky, Dimitrij Ryvlin, Steffen Hessler, Siegfried R. Waldvogel, and Ralf Hellmann "Planar optical sensor for trichlorofluoromethane", Proc. SPIE 11197, SPIE Future Sensing Technologies, 111970E (12 November 2019); https://doi.org/10.1117/12.2542013

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