公开(公告)号：US10739624B2

公开(公告)日：2020-08-11

申请号：US16367762

申请日：2019-03-28

Applicant: Sumitomo Osaka Cement Co., Ltd.

Inventor： Yuji Yamane ,  Tetsuya Fujino ,  Hideki Ichimei

IPC: G02F1/035

Abstract: An optical control element including an optical waveguide formed by using diffusion of titanium that is formed on a lithium niobate substrate and a control electrode formed on the lithium niobate substrate that is provided in the vicinity of the optical waveguide, in which an amount of a hydroxyl group absorbed into the lithium niobate substrate is set to be in a range of 0.5 to 2.5 cm−1.

公开(公告)号：US11215754B2

公开(公告)日：2022-01-04

申请号：US16697219

申请日：2019-11-27

Applicant: SUMITOMO OSAKA CEMENT CO., LTD.

Inventor： Yuji Yamane ,  Norikazu Miyazaki ,  Yu Kataoka ,  Hideki Ichimei

IPC: G02B6/122 ,  G02B6/13 ,  G02B6/30 ,  G02B6/293 ,  G02B6/14 ,  G02B6/12

Abstract: An optical waveguide element includes an optical waveguide which is formed on one surface of a substrate, an incidence part for light to be incident on the optical waveguide or an emission part for emitting light from the optical waveguide which is disposed in an end portion of the substrate, and a dielectric film which is formed on the optical waveguide of at least one of the incidence part and the emission part, and the vicinity thereof. Regarding the dielectric film, dielectric films including a dielectric film formed of a first material having an index of refraction higher than an index of refraction of the substrate and a dielectric film formed of a second material having an index of refraction lower than the index of refraction of the substrate are alternately laminated.