公开(公告)号：US11347086B2

公开(公告)日：2022-05-31

申请号：US17042839

申请日：2019-02-27

Applicant: SUMITOMO OSAKA CEMENT CO., LTD.

Inventor： Katsutoshi Kondo ,  Kiyotaka Nakano ,  Eiji Murakami ,  Junichiro Ichikawa

IPC: G02F1/035

Abstract: To provide an optical element in which an electrode is directly formed on an LN substrate, and a drift phenomenon is suppressed. In an optical element including: a substrate made of lithium niobate crystals; and an electrode disposed on the substrate, the substrate and the electrode are in direct contact with each other, and as a contact metal disposed on a surface of the electrode where the electrode is in contact with the substrate, a metal material whose standard enthalpy of formation per coordinate bond upon oxidation is greater than a standard enthalpy of formation per coordinate bond of niobium pentoxide is used.

公开(公告)号：US10359653B2

公开(公告)日：2019-07-23

申请号：US15840602

申请日：2017-12-13

Applicant: Sumitomo Osaka Cement Co., Ltd

Inventor： Katsutoshi Kondou ,  Kiyotaka Nakano ,  Eiji Murakami

IPC: G02B6/122 ,  G02B6/13 ,  G02B6/30 ,  G02B6/134 ,  G02F1/03 ,  G02F1/035 ,  G02F1/225

Abstract: A thin-plate LN optical control device includes: a thin-plate LN optical waveguide element which includes an optical waveguide formed by thermal diffusion of Ti in a substrate made of lithium niobate, and a control electrode that is formed on the substrate and is configured to control a light wave propagating through the optical waveguide, and in which at least a part of the substrate is thinned; and a housing that accommodates the thin-plate LN optical waveguide element in an air-tight sealing manner. Oxygen is contained in a filler gas inside the housing.

公开(公告)号：US20180164612A1

公开(公告)日：2018-06-14

申请号：US15840602

申请日：2017-12-13

Applicant: Sumitomo Osaka Cement Co., Ltd

Inventor： Katsutoshi Kondou ,  Kiyotaka Nakano ,  Eiji Murakami

IPC: G02F1/03 ,  G02B6/122 ,  G02B6/13 ,  G02F1/225 ,  G02F1/035

CPC classification number: G02F1/0316 ,  G02B6/122 ,  G02B6/13 ,  G02B6/1342 ,  G02B6/30 ,  G02F1/03 ,  G02F1/035 ,  G02F1/0353 ,  G02F1/225 ,  G02F1/2257

Abstract: A thin-plate LN optical control device includes: a thin-plate LN optical waveguide element which includes an optical waveguide formed by thermal diffusion of Ti in a substrate made of lithium niobate, and a control electrode that is formed on the substrate and is configured to control a light wave propagating through the optical waveguide, and in which at least a part of the substrate is thinned; and a housing that accommodates the thin-plate LN optical waveguide element in an air-tight sealing manner. Oxygen is contained in a filler gas inside the housing.