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Proceedings Paper

Planar waveguide sensor of ammonia
Author(s): Roman Rogoziński; Cuma Tyszkiewicz; Paweł Karasiński; Weronika Izydorczyk
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Paper Abstract

The paper presents the concept of forming ammonia sensor based on a planar waveguide structure. It is an amplitude sensor produced on the basis of the multimode waveguide. The technological base for this kind of structure is the ion exchange method and the sol-gel method. The planar multimode waveguide of channel type is produced in glass substrate (soda-lime glass of Menzel-Glaser company) by the selective Ag+↔Na+ ion exchange. On the surface of the glass substrate a porous (~40%) silica layer is produced by the sol-gel method. This layer is sensitized to the presence of ammonia in the surrounding atmosphere by impregnation with Bromocresol Purple (BCP) dye. Therefore it constitutes a sensor layer. Spectrophotometric tests carried out showed about 50% reduction of cross-transmission changes of such sensor layer for a wave λ=593 nm caused by the presence of 25% ammonia water vapor in its ambience. The radiation source used in this type of sensor structure is a light emitting diode LED. The gradient channel waveguide is designed for frontal connection (optical glue) with a standard multimode telecommunications waveguide 62.5/125μm.

Paper Details

Date Published: 17 December 2015
PDF: 6 pages
Proc. SPIE 9816, Optical Fibers and Their Applications 2015, 98160T (17 December 2015); doi: 10.1117/12.2222518
Show Author Affiliations
Roman Rogoziński, Silesian Univ. of Technology (Poland)
Cuma Tyszkiewicz, Silesian Univ. of Technology (Poland)
Paweł Karasiński, Silesian Univ. of Technology (Poland)
Weronika Izydorczyk, Silesian Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 9816:
Optical Fibers and Their Applications 2015
Ryszard S. Romaniuk; Waldemar Wojcik; Andrzej Smolarz, Editor(s)

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