The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 28, 2009
Filed:
Aug. 08, 2008
Xiaoli Dai, Ottawa, CA;
Stephen J. Mihailov, Kanata, CA;
Robert B. Walker, Spencerville, CA;
Chantal Blanchetiere, Ottawa, CA;
Claire Callender, Nepean, CA;
Huimin Ding, Nepean, CA;
Ping LU, Ottawa, CA;
Dan Grobnic, Ottawa, CA;
Christopher W. Smelser, Ottawa, CA;
Gino Cuglietta, Kanata, CA;
Xiaoli Dai, Ottawa, CA;
Stephen J. Mihailov, Kanata, CA;
Robert B. Walker, Spencerville, CA;
Chantal Blanchetiere, Ottawa, CA;
Claire Callender, Nepean, CA;
Huimin Ding, Nepean, CA;
Ping Lu, Ottawa, CA;
Dan Grobnic, Ottawa, CA;
Christopher W. Smelser, Ottawa, CA;
Gino Cuglietta, Kanata, CA;
Abstract
An optical sensor for sensing information relating to an analyte liquid or gas, has a a planar substrate having a refractive index n. The planar substrate supports a ridge waveguide having an unclad top portion having a refractive index n. The substrate serves as cladding layer for the ridge waveguide at a location where the ridge waveguide contacts the substrate. A Bragg grating inscribed in the ridge waveguide has two modes for providing information relating to both temperature and refractive index of the surrounding analyte liquid or gas. A cladding mode has a different response to the analyte when compared to a Bragg resonance response. Both modes have a same reaction to temperature, wherein said Bragg grating is formed within the unclad region of ridge waveguide, wherein n<n. Advantageously multiple parameters can be sensed using only a single Bragg grating.