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. 30, 2010
Filed:
Feb. 22, 2008
Akira Ishii, Kawasaki, JP;
Takehito Tanaka, Kawasaki, JP;
Masaharu Doi, Kawasaki, JP;
Tetsu Hasegawa, Kawasaki, JP;
Akira Ishii, Kawasaki, JP;
Takehito Tanaka, Kawasaki, JP;
Masaharu Doi, Kawasaki, JP;
Tetsu Hasegawa, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An optical device including (a) a substrate having an electro-optic effect; (b) a modulating optical waveguide formed on a surface layer portion of said substrate and forming an interference optical modulator for modulating input light; (c) an output optical waveguide formed on said surface layer portion of said substrate and connected to a downstream side portion of said modulating optical waveguide; and (d) a branching monitoring section for monitoring branched light of light propagated along said output optical waveguide and emitted from an outgoing end face of said substrate. The output waveguide has a reduced width region in which the waveguide width is reduced.