公开(公告)号：US20220163825A1

公开(公告)日：2022-05-26

申请号：US17593931

申请日：2019-09-27

Applicant: SUMITOMO OSAKA CEMENT CO., LTD.

Inventor： Yu KATAOKA ,  Norikazu MIYAZAKI

IPC: G02F1/035

Abstract: In order to provide an optical waveguide element that is capable of reducing coupling loss at a coupling portion with an optical fiber and of reducing propagation loss in an optical waveguide, the optical waveguide element comprises a supporting substrate and a waveguide layer consisting of a material having an electro-optic effect stacked on the supporting substrate, wherein a rib portion for forming an optical waveguide is provided protruding on an upper surface of the waveguide layer; a groove portion is formed on an upper surface of the supporting substrate directly below a part of the rib portion; and the groove portion is filled with a material having an effective refractive index comparable to that of the waveguide layer.

公开(公告)号：US20200292757A1

公开(公告)日：2020-09-17

申请号：US16667888

申请日：2019-10-29

Applicant: SUMITOMO OSAKA CEMENT CO., LTD.

Inventor： Yu KATAOKA ,  Norikazu MIYAZAKI

IPC: G02B6/26

Abstract: In the optical waveguide device including an unnecessary-light waveguide for guiding unnecessary light emitted from a main waveguide, an emission waveguide connected to the unnecessary-light waveguide to emit the unnecessary light propagating through the unnecessary-light waveguide to the outside of the substrate is formed; an effective refractive index of the emission waveguide is set to be higher than an effective refractive index of the unnecessary-light waveguide; in a connection portion between the unnecessary-light waveguide and the emission waveguide, a centerline of the emission waveguide is inclined in a direction away from the main waveguide with respect to a centerline of the unnecessary-light waveguide; furthermore, in the connection portion, a position of the centerline of the emission waveguide is disposed to be shifted to a position further away from the main waveguide with respect to a position of the centerline of the unnecessary-light waveguide.

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：US20230152660A1

公开(公告)日：2023-05-18

申请号：US17916400

申请日：2020-12-04

Applicant: SUMITOMO OSAKA CEMENT CO., LTD.

Inventor： Norikazu MIYAZAKI ,  Yu KATAOKA

IPC: G02F1/225 ,  G02F1/21

CPC classification number: G02F1/2255 ,  G02F1/212

Abstract: Provided is an optical control element that can minimize an optical path difference between branched waveguides while reducing a difference in structure between the branched waveguides by disposing an input portion and an output portion of an optical waveguide on the same side of a substrate on which the optical waveguide is formed. An optical control element includes a substrate 1 having an electro-optic effect, an optical waveguide 2 formed on the substrate, and a control electrode controlling a light wave propagating through the optical waveguide, in which an input portion (input light L1) and an output portion (output light L2) of the optical waveguide are formed on the same side of the substrate, the optical waveguide includes at least one Mach-Zehnder type optical waveguide portion (MZ) that has two branched waveguides (21, 22) branched from one optical waveguide and combines the two branched waveguides to form one optical waveguide, and the branched waveguides have an even number of turned-back potions (A1, A2).

公开(公告)号：US20220308286A1

公开(公告)日：2022-09-29

申请号：US17695789

申请日：2022-03-15

Applicant: SUMITOMO OSAKA CEMENT CO., LTD.

Inventor： Yu NAKATA ,  Yu KATAOKA ,  Norikazu MIYAZAKI

IPC: G02B6/125 ,  G02F1/21 ,  G02B6/12

Abstract: An optical waveguide element includes: a substrate; and a plurality of optical waveguides causing light to turn between a first direction and a second direction that is an opposite direction of the first direction in a plane of the substrate, the plurality of optical waveguides includes first portions extending in the first direction with a predetermined distance therebetween, second portions extending in a third direction that is different from the first direction, and third portions extending in the second direction, and each of the plurality of optical waveguides except for the optical waveguide in which the second portion extending in the third direction is located on an innermost side in the first direction intersects, at the third portion, another optical waveguide in which the second portion extending in the third direction is located further inward in the first direction.

公开(公告)号：US20220291447A1

公开(公告)日：2022-09-15

申请号：US17764950

申请日：2020-09-23

Applicant: SUMITOMO OSAKA CEMENT CO., LTD.

Inventor： Yu KATAOKA ,  Norikazu MIYAZAKI

IPC: G02B6/125

Abstract: Provided is an optical waveguide element that prevents leaked light generated at a forking section from entering a downstream optical waveguide such as another forking section, thereby affording minimal degradation of optical characteristics. The optical waveguide is characterized in that: at least one of two fork waveguides (20a, 20b) forking from a first forking section (20) comprises a second forking section (21, 22); slab waveguides (3c-1 to 3c-3) are formed between the two fork waveguides; and between the first forking section and the second forking section, slits (41, 42) are formed that partition the slab waveguides into a first slab waveguide area (3c-1) close to the first forking section and second slab waveguide areas (3c-2, 3c-3) close to the second forking section(s).

公开(公告)号：US20190293865A1

公开(公告)日：2019-09-26

申请号：US16360031

申请日：2019-03-21

Applicant: SUMITOMO OSAKA CEMENT CO., LTD.

Inventor： Yu KATAOKA ,  Norikazu MIYAZAKI

IPC: G02B6/122 ,  G02B6/293 ,  G02F1/01

Abstract: In an optical waveguide element, an optical waveguide is formed on a substrate, the optical waveguide has a main waveguide that propagates signal light, a waveguide for unnecessary light that guides unnecessary light released from the main waveguide, and a waveguide for collecting unnecessary light to which the unnecessary light emitted from the waveguide for unnecessary light is introduced, the waveguide for unnecessary light is connected to the waveguide for collecting unnecessary light via a waveguide for connection, and a width of the waveguide for connection, which is a width in a direction that perpendicularly intersects a propagation direction of the unnecessary light, at a portion connected to the waveguide for collecting unnecessary light is set to be wider than a width at a portion connected to the waveguide for unnecessary light with the waveguide for connection.