@inproceedings{cd341134a11e481482c1a3adca1e3853,
title = "Planar waveguide sensor of ammonia",
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+{\^a}†{"}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 I=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 62.5/125I1/4m.",
keywords = "attenuation coefficients, dye, ion-exchange, optical sensors, planar waveguides, sol-gel",
author = "Roman Rogozinski and Cuma Tyszkiewicz and Pawe{\l} Karasinski and Weronika Izydorczyk",
note = "Publisher Copyright: {\textcopyright} 2015 SPIE.; 16th Conference on Optical Fibers and Their Applications ; Conference date: 22-09-2015 Through 25-09-2015",
year = "2015",
doi = "10.1117/12.2222518",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Waldemar Wojcik and Romaniuk, \{Ryszard S.\}",
booktitle = "Optical Fibers and Their Applications 2015",
address = "United States",
}