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. 18, 2003
Filed:
Aug. 17, 2000
Applicant:
Inventors:
Masakazu Takabayashi, Tokyo, JP;
Kiichi Yoshiara, Tokyo, JP;
Sadayuki Matsumoto, Tokyo, JP;
Junichiro Hoshizaki, Tokyo, JP;
Takeyuki Maegawa, Tokyo, JP;
Hajime Takeya, Tokyo, JP;
Kiyohide Sakai, Tokyo, JP;
Minoru Hashimoto, Tokyo, JP;
Fusaoki Uchikawa, Tokyo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/34 ;
U.S. Cl.
CPC ...
G02B 6/34 ;
Abstract
A waveguide grating device controlling Bragg wavelength after manufacture of the device includes an optical waveguide on a substrate. A variable stress is applied to a waveguide grating in part of the waveguide to bend at least the portion of the substrate including the waveguide grating, changing the Bragg wavelength.