Patent ID: 7864321
Filing Date: 2011-01-04
Classification: G01N

Abstract:
1. An evanescent wave multimode optical waveguide sensor for measuring at least one of a chemical species and a physical parameter, the sensor comprising: an optical waveguide having an optical waveguide core with a core refractive index and a cladding, surrounding said core, with a cladding refractive index, for guiding light to be propagated, said optical waveguide having: a light source unit connected to said optical waveguide for providing said light to be propagated in said optical waveguide; a detection unit connected to said optical waveguide for detecting said light propagated in said optical waveguide for determining an optical absorbance of said light in said optical waveguide; and a processing unit associated with said detection unit for determining said at least one of a chemical species and a physical parameter from the determined optical absorbance.