公开(公告)号：US20210199997A1

公开(公告)日：2021-07-01

申请号：US17105615

申请日：2020-11-26

Applicant: SUMITOMO OSAKA CEMENT CO., LTD.

Inventor： Kousuke OKAHASHI ,  Toru SUGAMATA

IPC: G02F1/035 ,  G02F1/03 ,  G02F1/225

Abstract: An optical waveguide element is provided to effectively reduce an optical absorption loss of waveguide light which may occur at an intersecting part between an optical waveguide and an electrode without causing deterioration in optical characteristics and degradation of long-term reliability of the optical waveguide element. The optical waveguide element includes an optical waveguide formed in a substrate, and an electrode controlling optical waves propagated in the optical waveguide and having an intersecting part intersecting the optical waveguide thereabove. A portion of a resin layer is provided between the optical waveguide and the electrode in a portion of the substrate including the intersecting part. A corner of the resin layer on a side of the electrode is constituted to be a curve in a cross section in an extending direction of the electrode.