公开(公告)号：US11506950B2

公开(公告)日：2022-11-22

申请号：US17202288

申请日：2021-03-15

Applicant: SUMITOMO OSAKA CEMENT CO., LTD.

Inventor： Yu Nakata ,  Norikazu Miyazaki

IPC: G02F1/21 ,  G02F1/225 ,  G02F1/035

Abstract: In an optical waveguide element which uses a rib type optical waveguide, light propagating in the rib type optical waveguide is monitored stably and accurately. The optical waveguide element includes a rib type optical waveguide provided on a optical waveguide substrate and configured of a convex portion protruding in a thickness direction of the optical waveguide substrate and extending in a plane direction of the optical waveguide substrate, and a light receiving element configured of a light receiving part formed on a light receiving element substrate disposed on the rib type optical waveguide and configured to receive at least a part of light propagating through the rib type optical waveguide, and the light receiving element substrate is supported by at least one first convex portion having the same height as that of the rib type optical waveguide provided on the optical waveguide substrate.

公开(公告)号：US11460650B2

公开(公告)日：2022-10-04

申请号：US17215260

申请日：2021-03-29

Applicant: SUMITOMO OSAKA CEMENT CO., LTD.

Inventor： Norikazu Miyazaki ,  Yu Nakata

IPC: G02B6/42

Abstract: An optical waveguide device includes: a substrate having an electro-optic effect, an optical waveguide formed on the substrate, a light-receiving element disposed on the substrate and monitoring a light wave propagating through the optical waveguide or a light wave that is radiated from the optical waveguide; and a monitoring optical waveguide extending from the optical waveguide to the light-receiving element, in which the monitoring optical waveguide has a U-turn waveguide with respect to an output direction of the optical waveguide, and the light-receiving element is disposed at a part of the monitoring optical waveguide after the U-turn waveguide.

公开(公告)号：US11327347B2

公开(公告)日：2022-05-10

申请号：US17043407

申请日：2019-01-24

Applicant: SUMITOMO OSAKA CEMENT CO., LTD.

Inventor： Yu Nakata ,  Tetsuya Fujino ,  Satoshi Oikawa

IPC: G02F1/03 ,  G02F1/035

Abstract: Provided is an optical waveguide element capable of connection such as wire bonding, suppressing usage of gold, and suppressing deterioration of a conductor loss. An optical waveguide element includes a substrate 1 having an electro-optic effect, an optical waveguide 2 formed on the substrate, and a control electrode (30, 31) provided on the substrate and controlling a light wave propagating through the optical waveguide. The control electrode is made of a material other than gold, and the gold is disposed on at least a wire bonding portion 4 of the control electrode.