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:
Sep. 27, 2005
Filed:
May. 28, 2004
Masaki Sugiyama, Kawasaki, JP;
Tadao Nakazawa, Zama, JP;
Masaharu Doi, Kawasaki, JP;
Takehito Tanaka, Kawasaki, JP;
Akira Ishii, Kawasaki, JP;
Masaki Sugiyama, Kawasaki, JP;
Tadao Nakazawa, Zama, JP;
Masaharu Doi, Kawasaki, JP;
Takehito Tanaka, Kawasaki, JP;
Akira Ishii, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
The present invention has an object to provide a Mach-Zehnder optical modulator with the excellent productivity and reliability, which can obtain a favorable optical response characteristic even if a high frequency electric signal is applied to a signal electrode. To this end, the present optical modulator is configured such that, in a Mach-Zehnder optical modulator in which an optical waveguide and a coplanar electrode are formed on a surface of a substrate having an electro-optic effect, floating electrodes formed using a conducting material, are provided on side faces along parallel waveguides, among side faces substantially perpendicular to the surface of the substrate. Thus, even when a high frequency electric signal is applied to the signal electrode, a phenomenon is suppressed in which a particular frequency resonates within the substrate, and an occurrence of dip in a particular frequency is avoided.