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:
Jul. 03, 2007
Filed:
Nov. 19, 2002
Masaharu Doi, Kawasaki, JP;
Tadao Nakazawa, Kawasaki, JP;
Masaki Sugiyama, Kawasaki, JP;
Masaaki Ohyama, Kawasaki, JP;
Masaharu Doi, Kawasaki, JP;
Tadao Nakazawa, Kawasaki, JP;
Masaki Sugiyama, Kawasaki, JP;
Masaaki Ohyama, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
The present invention provides an optical waveguide device wherein a driving voltage to be applied is reduced. The optical waveguide device comprises a substrate cut in a Z-axis direction and having an electro-optical effect, an interference type optical waveguide formed on the substrate for causing lights which propagate along a plurality of parallel optical waveguides to interfere with each other, and a lumped-constant type electrode for applying a voltage for the electro-optical effect to the light propagating along the optical waveguides which form the interference type optical waveguide. The lumped-constant type electrode complements potentials to be supplied to adjacent ones of the plurality of parallel optical waveguides to each other such that voltages having an equal absolute value but having the opposite signs are applied to the adjacent optical waveguides. The apparatus of the present invention is applied to, for example, an optical communication system.