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:
Aug. 28, 2012
Filed:
Jul. 11, 2008
Applicants:
Masafumi Nakada, Tokyo, JP;
Takanori Shimizu, Tokyo, JP;
Inventors:
Masafumi Nakada, Tokyo, JP;
Takanori Shimizu, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/00 (2006.01); G02B 6/12 (2006.01); G02B 6/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
At least part of an optical device comprises an optical waveguide of a magneto-optical material. The magneto-optical material comprises a polycrystalline material having no lattice matching with an underlayer material. The optical waveguide exhibits no magnetic anisotropy due to an inverse magnetostriction effect caused by thermal strain. The magnetization direction of the optical waveguide is aligned with a traveling direction of light passing through the waveguide by shape magnetic anisotropy.