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:
Jun. 16, 2026
Filed:
Jun. 08, 2023
Applicant:
National Research Council of Canada, Ottawa, CA;
Inventors:
Cyril Hnatovsky, Ottawa, CA;
Dan Grobnic, Ottawa, CA;
Stephen Mihailov, Kanata, CA;
Robert Walker, Spencerville, CA;
Ping Lu, Ottawa, CA;
Huimin Ding, Nepean, CA;
David Coulas, Ottawa, CA;
Kasthuri De Silva, Milton, CA;
Assignee:
NATIONAL RESEARCH COUNCIL OF CANADA, Ottawa, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/02 (2006.01); G01N 21/77 (2006.01); G02B 5/18 (2006.01); G02B 6/293 (2006.01);
U.S. Cl.
CPC ...
G02B 6/02138 (2013.01); G01N 21/774 (2013.01); G02B 5/18 (2013.01); G02B 6/29356 (2013.01); G01N 2201/06113 (2013.01);
Abstract
T-phase-shifted fiber Bragg gratings in optical waveguides, and methods of formation thereof. Sensing apparatus comprising such gratings using femtosecond pulse duration lasers and specialized transmission diffraction elements or phase masks.