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Film-coated optical waveguide devices

Selective Response of Polymeric-Film-Coated Optical Waveguide Devices to Water and Toxic Volatile Compounds... [Pg.320]

A reversible optical waveguide sensor for ammonia vapor was introduced more recently [137], consisting of a small capillary glass tube fltted with a LED and a phototransistor detector to form a multiple reflecting optical device. When the capillary was coated with a thin solid film composed of a pH-sensitive oxazine dye, the instrument was capable of reversibly sensing ammonia. Vapor concentrations from 100 to below 60 ppm were easily and reproducibly detected. A preliminary qualitative kinetic model was proposed to describe the vapor-film interactions. [Pg.207]

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Coating devices

Coatings waveguide

Film coating

Films optical

Optical coatings

Waveguide

Waveguide device

Waveguide optical

Waveguiding

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