公开(公告)号：US20210325761A1

公开(公告)日：2021-10-21

申请号：US17169983

申请日：2021-02-08

Applicant: Fujitsu Optical Components Limited

Inventor： Shuntaro MAKINO ,  Yoshinobu KUBOTA ,  Yasuhiro OHMORI ,  Masaharu DOI ,  Shintaro TAKEUCHI

IPC: G02F1/225 ,  F21V8/00 ,  G02F1/03

Abstract: An optical waveguide device has a substrate, an intermediate layer, a thin-film LN layer containing an X-cut lithium niobate, and a buffer layer stacked on the substrate, and an optical waveguide having a ridge shape formed in the thin-film LN layer. The optical waveguide device includes a plurality of electrodes provided, respectively, at a first side and a second side of the optical waveguide. The electrodes are disposed so that respective bottom surfaces thereof are at positions lower than a position of a surface of the buffer layer.

公开(公告)号：US20200041824A1

公开(公告)日：2020-02-06

申请号：US16515573

申请日：2019-07-18

Applicant: Fujitsu Optical Components Limited

Inventor： Yasuhiro OHMORI ,  Yoshinobu KUBOTA ,  Masaharu DOI ,  Shintaro TAKEUCHI ,  Yoshihiko YOSHIDA

IPC: G02F1/035 ,  G02F1/225

Abstract: An optical modulator includes an optical waveguide of a ridge type formed of a thin film of a dielectric material having an electro-optic effect over a substrate, a buffer layer covering the optical waveguide, and a signal electrode provided over the optical waveguide via the buffer layer, wherein a width of the signal electrode is greater than a ridge width of the optical waveguide and wherein the signal electrode covers at least one of sidewalls of a ridge of the optical waveguide.

公开(公告)号：US20160223881A1

公开(公告)日：2016-08-04

申请号：US14946078

申请日：2015-11-19

Applicant: FUJITSU OPTICAL COMPONENTS LIMITED

Inventor： Masaharu DOI ,  YOSHIHIKO YOSHIDA ,  Yoshinobu KUBOTA ,  Yoshitada KAWASHIMA

IPC: G02F1/225 ,  G02F1/00

CPC classification number: G02F1/0036 ,  G02F1/0316 ,  G02F1/0508 ,  G02F1/225 ,  G02F1/2255 ,  G02F2001/212 ,  G02F2202/20 ,  G02F2202/22

Abstract: An optical modulator includes: a ferroelectric substrate in which an input optical waveguide, first and second optical waveguides, and an output optical waveguide are formed; a first electrode formed in a vicinity of the first optical waveguide and to which a first DC voltage is applied; a second electrode formed in a vicinity of the second optical waveguide and to which a second DC voltage is applied; a third electrode electrically connected to the first electrode and formed on both sides of the second electrode; and a fourth electrode electrically connected to the second electrode and formed on both sides of the first electrode. A first gap between the first electrode and the fourth electrode is approximately the same as a second gap between the second electrode and the third electrode. A gap between the third electrode and the fourth electrode is 1-5 times greater than the first gap.

Abstract translation: 光调制器包括：形成输入光波导，第一和第二光波导和输出光波导的铁电基板; 形成在第一光波导附近并施加第一直流电压的第一电极; 形成在所述第二光波导附近并且施加有第二DC电压的第二电极; 电连接到第一电极并形成在第二电极的两侧上的第三电极; 以及电连接到第二电极并形成在第一电极的两侧上的第四电极。 第一电极和第四电极之间的第一间隙与第二电极和第三电极之间的第二间隙大致相同。 第三电极和第四电极之间的间隙比第一间隙大1-5倍。