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Proceedings Paper

Sol-gel planar waveguide chemical sensors utilizing grating couplers
Author(s): Aidan M. Doyle; Brian D. MacCraith
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Paper Abstract

A novel, generic configuration for absorption-based optical sensors is presented. This technique utilizes embossed sol- gel glass derived gratings to couple LED light into and out of a planar waveguide. The power of the guided light is monitored as its evanescent field interrogates a dye-doped sol-gel sensor layer. This waveguiding arrangement is easy to manufacture and shows great potential for use in disposable, mass-produced sensor chips for a range of absorption-based sensing tasks. The sensor is then applied towards ammonia sensing in the ppm region.

Paper Details

Date Published: 23 February 1999
PDF: 10 pages
Proc. SPIE 3540, Chemical, Biochemical, and Environmental Fiber Sensors X, (23 February 1999); doi: 10.1117/12.339790
Show Author Affiliations
Aidan M. Doyle, Dublin City Univ. (Canada)
Brian D. MacCraith, Dublin City Univ. (Ireland)

Published in SPIE Proceedings Vol. 3540:
Chemical, Biochemical, and Environmental Fiber Sensors X
Robert A. Lieberman, Editor(s)

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