Waveguide-based optical chemical sensor

Details Waveguide-based optical chemical sensor Waveguide-based optical chemical sensor

2007-03-13

2007-03-13

Assaf, Fayez G. (Department: 2872)

Optical waveguides

Optical waveguide sensor

C385S011000, C356S484000

Reexamination Certificate

active

10958965

ABSTRACT:
The invention provides an apparatus and method for highly selective and sensitive chemical sensing. Two modes of laser light are transmitted through a waveguide, refracted by a thin film host reagent coating on the waveguide, and analyzed in a phase sensitive detector for changes in effective refractive index. Sensor specificity is based on the particular species selective thin films of host reagents which are attached to the surface of the planar optical waveguide. The thin film of host reagents refracts laser light at different refractive indices according to what species are forming inclusion complexes with the host reagents.

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