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Polymer waveguides for sensor applications.

Polymer-Wellenleiter für Sensoranwendungen
: Holler, T.; Böttner, H.; Dumbs, A.

Lessard, R.A. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Nonconducting photopolymers and applications : 20 - 21 July 1992, San Diego/Calif.
Bellingham/Wash.: SPIE, 1992 (SPIE Proceedings Series 1774)
ISBN: 0-8194-0947-2
International Symposium on Optical and Optoelectronic Applied Science and Engineering <1992, San Diego/Calif.>
Fraunhofer IPM ()
absorption; gas sensor; gassensor; integrated optics; integrierte Optik; pH-sensor; polymer waveguide; Polymer-Wellenleiter

Strip waveguides have been fabricated in a thin film consisting of a mixture of poly(methylmethacrylate) (PMMA) with a UV-sensitive photoinitiator. The film is deposited by spincoating on a PMMA substrate. As an example for a sensor application, the waveguides were doped with the pH-indicator dye bromophenol blue, which changes the optical behaviour of the lightguide in interaction with a humid environment like an aqueous liquid or a gas.