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:
Mar. 19, 2013
Filed:
Mar. 16, 2010
Applicants:
Akinori Hayakawa, Kawasaki, JP;
Takuya Fujii, Yamanashi, JP;
Inventors:
Akinori Hayakawa, Kawasaki, JP;
Takuya Fujii, Yamanashi, JP;
Assignees:
Fujitsu Limited, Kawasaki, JP;
Sumitomo Electric Device Innovations, Inc., Yamanashi, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/26 (2006.01); G02B 6/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
A first optical waveguide of a convex shape is formed over a substrate. A second optical waveguide of a convex shape is formed over the substrate. A multimode interference waveguide of a convex shape is formed over the substrate for optically coupling the first optical waveguide to the second optical waveguide. Either side of the first optical waveguide is filled with a filling material, but either side of the second optical waveguide is not filled with the filling material.