Waveguide type optical element

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United States of America Patent

PATENT NO 9946100
SERIAL NO

15516196

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Abstract

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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 (100) having an electro-optic effect, two optical waveguides (104 and 106) disposed on a surface of the substrate, a non-conductive layer (120) which is disposed on the substrate and is made of a material having a lower dielectric constant than the substrate, and a control electrode (150) 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.

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Patent Owner(s)

Patent OwnerAddress
SUMITOMO OSAKA CEMENT CO LTD1-9-2 HIGASHI-SHIMBASHI MINATO-KU TOKYO 105-8641

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fujino, Tetsuya Tokyo, JP 18 47
Ichikawa, Junichiro Tokyo, JP 65 385
Kondou, Katsutoshi Tokyo, JP 30 179
Yanagawa, Teppei Tokyo, JP 1 6

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