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:
May. 27, 2008
Filed:
Oct. 05, 2005
Stephen J. Mihailov, Kanata, CA;
Dan Grobnic, Ottawa, CA;
Christopher Smelser, Ottawa, CA;
Robert Walker, Spencerville, CA;
Ping LU, Ottawa, CA;
Huimin Ding, Nepean, CA;
George Henderson, Ottawa, CA;
Xiaoli Dai, Ottawa, CA;
Stephen J. Mihailov, Kanata, CA;
Dan Grobnic, Ottawa, CA;
Christopher Smelser, Ottawa, CA;
Robert Walker, Spencerville, CA;
Ping Lu, Ottawa, CA;
Huimin Ding, Nepean, CA;
George Henderson, Ottawa, CA;
Xiaoli Dai, Ottawa, CA;
Abstract
A retro-reflective sensor for sensing mechanical, chemical or temperature related information, is disclosed. The sensor is formed of an optical waveguide suitable for use in-situ in a high temperature environment having a Bragg grating written into a core region thereof with short-pulsed electromagnetic radiation, said optical waveguide having a glass transition temperature substantially higher than that of silica. Preferably the sensor is written into a length of sapphire fiber or within a zirconium waveguide. Preferably the pulse duration of the short pulsed electromagnetic radiation is less than 500 picoseconds.