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:
Apr. 17, 2018
Filed:
Mar. 24, 2016
Sumitomo Osaka Cement Co., Ltd, Tokyo, JP;
Teppei Yanagawa, Tokyo, JP;
Katsutoshi Kondou, Tokyo, JP;
Tetsuya Fujino, Tokyo, JP;
Junichiro Ichikawa, Tokyo, JP;
Sumitomo Osaka Cement Co., Ltd., Tokyo, JP;
Abstract
To effectively prevent the acceleration of the drift phenomenon generated by the application of a high electric field to a substrate through a bias electrode in a waveguide type optical element. A waveguide type optical element includes a substrate () having an electro-optic effect, two optical waveguides (and) disposed on a surface of the substrate, a non-conductive layer () which is disposed on the substrate and is made of a material having a lower dielectric constant than the substrate, and a control electrode () which is disposed on the non-conductive layer and is intended to generate a refractive index difference between the two optical waveguides by respectively applying electric fields to the two optical waveguides, and the non-conductive layer is constituted of a material which includes silicon oxide, an oxide of indium, and an oxide of titanium and has a ratio between a molar concentration of the titanium oxide and a molar concentration of indium oxide of 1.2 or more, and a voltage generating an electric field of 1 V/μm or more in the substrate is applied to the control electrode.