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:
Jun. 23, 2009
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) an optical waveguide formed on a surface layer portion of said substrate and including an optical waveguide for performing optical modulation for light inputted to said substrate and an output optical waveguide and a monitoring optical waveguide branched from and connected to a downstream side portion of said modulating optical waveguide, said monitoring optical waveguide guiding light for monitoring optical modulation operation of said modulating optical waveguide; and (c) a reflecting portion being provided on the downstream side of said monitoring optical waveguide for reflecting light propagated along said monitoring optical waveguide, the width of a reflection face of said reflecting portion being substantially equal to the cut-out width of said monitoring optical waveguide.