公开(公告)号：US20240310663A1

公开(公告)日：2024-09-19

申请号：US18268070

申请日：2021-12-22

Applicant: SUMITOMO OSAKA CEMENT CO., LTD.

Inventor： Yuki KUGIMOTO ,  Yu KATAOKA ,  Shingo TAKANO

IPC: G02F1/035

CPC classification number: G02F1/035 ,  G02F2201/063

Abstract: Provided is an optical waveguide element that can suppress insertion loss related to coupling to an optical fiber or the like while achieving a reduction in size of an optical waveguide element, and has a SSC structure with high light resistance, heat resistance, or manufacturing efficiency. An optical waveguide element includes an optical waveguide substrate 1 having a rib-type optical waveguide 10 formed of a material having an electro-optic effect, and a holding member 2 that is disposed and fixed at a position where an input end or an output end of the rib-type optical waveguide is formed, to overlap the optical waveguide substrate, in which another optical waveguide 20 with a mode field diameter greater than that of the rib-type optical waveguide is formed on a surface of the holding member facing the rib-type optical waveguide, and the optical waveguide substrate and the holding member are bonded through an adhesive layer 30.

公开(公告)号：US20240069281A1

公开(公告)日：2024-02-29

申请号：US18270168

申请日：2021-12-22

Applicant: SUMITOMO OSAKA CEMENT CO., LTD.

Inventor： Yuki KUGIMOTO ,  Yumi MURATA ,  Yu KATAOKA ,  Shingo TAKANO

IPC: G02B6/122

CPC classification number: G02B6/1228 ,  G02B2006/12142

Abstract: Provided is an optical waveguide element including spot size conversion means with suppressed optical insertion loss without complicating a manufacturing process. An optical waveguide element includes an optical waveguide substrate (4) having a rib-type optical waveguide (10) formed of a material having an electro-optic effect, and spot size conversion means for changing a mode field diameter of a light wave propagating through the optical waveguide at a position where an input end or an output end of the rib-type optical waveguide (10) is formed, in which the spot size conversion means includes a first configuration layer (1) that is connected to the rib-type optical waveguide (10) and includes a tapered portion (11) in which a width of the optical waveguide expands, a second configuration layer (2) that is laminated on the first configuration layer (1) and has a width narrower than a width of the first configuration layer (1), and a third configuration layer (3) that is disposed to cover the second configuration layer (2) excluding a part of the second configuration layer (2) close to the rib-type optical waveguide and has a width wider than the width of the second configuration layer (2).

公开(公告)号：US20230314732A1

公开(公告)日：2023-10-05

申请号：US18029393

申请日：2021-09-29

Applicant: SUMITOMO OSAKA CEMENT CO., LTD.

Inventor： Shotaro HIRATA ,  Shingo TAKANO ,  Yu KATAOKA

IPC: G02B6/42 ,  G02F1/01

CPC classification number: G02B6/4212 ,  G02B6/4246 ,  G02F1/0115

Abstract: An optical waveguide element that suppresses insertion loss related to coupling to an optical fiber or the like while miniaturizing the optical waveguide element is provided. There is provided an optical waveguide element including: a rib optical waveguide (10) that is made of a material (1) having an electro-optic effect; and the reinforcing substrate (2) that supports the optical waveguide, in which one end of the optical waveguide forms a tapered portion (11) of which a width narrows toward an end surface of the reinforcing substrate, a structure (3) made of a material having a higher refractive index than a material constituting the reinforcing substrate is provided so as to cover the tapered portion, and a coating layer (4) made of a material having a lower refractive index than the material constituting the structure is disposed so as to cover the structure.

公开(公告)号：US20230026594A1

公开(公告)日：2023-01-26

申请号：US17757951

申请日：2020-10-20

Applicant: SUMITOMO OSAKA CEMENT CO., LTD.

Inventor： Kosuke OKAHASHI ,  Shingo TAKANO

IPC: G02F1/035 ,  G02F1/21 ,  G02B6/13

Abstract: In order to provides an optical waveguide element and an optical modulator that can prevent the damage to the substrate and the deterioration of the properties of the substrate that may occur due to the stress, by reducing the influence of stress on the substrate by the buffer layer, the optical waveguide 1 is provided with a substrate 5 having an electro-optical effect; an optical waveguide 10 formed on the substrate 5; a first buffer layer 9a provided on the substrate 5; and a second buffer layer 9b provided under the substrate 5, wherein the first buffer layer 9a and the second buffer layer 9b are composed of substantially the same material and have substantially the same thickness, and the first buffer layer 9a and the second buffer layer 9b are formed to be in contact with an upper surface and lower surface of the substrate 5, respectively.