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:
Feb. 26, 2008
Filed:
Jun. 28, 2001
Applicant:
Bernard Y. Malo, Gatineau, CA;
Inventor:
Bernard Y. Malo, Gatineau, CA;
Assignee:
Avanex Corporation, Fremont, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/34 (2006.01); G02B 6/02 (2006.01); G02B 6/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for producing a Bragg grating in an optical waveguide device such as an optical fiber. The optical fiber is exposed to a UV source through a phase mask and this produces a Bragg grating on the fiber. The grating on the fiber is overexposed such that the gratings are stronger than desired. The fiber is then annealed to stabilize the gratings left behind. The gratings left behind are still stronger than desired. The fiber is then exposed to a point source laser that reduces the index change for selected portions. This trims the existing grating to result in the desired grating strength.