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:
Nov. 22, 1994
Filed:
Oct. 29, 1992
Applicant:
Inventors:
Kenneth O Hill, Kanata, CA;
Bernard Y Malo, Gatineau, CA;
Francois C Bilodeau, Nepean, CA;
Derwyn C Johnson, Nepean, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ; H01L / ;
U.S. Cl.
CPC ...
385 37 ; 385 14 ; 385129 ; 385130 ; 385147 ; 359566 ; 359569 ; 359573 ; 359900 ; 437-4 ; 437 51 ;
Abstract
An index grating is imprinted in the core of an optical fiber using a specially designed silica glass phase grating mask. The phase mask is held in close proximity to the optical fiber. Laser irradiation of the phase mask with ultraviolet light at normal incidence imprints (photoinduces) into the optical fiber core the interference pattern created by the phase mask.