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1.发明公开公开(公告)号：US20240255827A1
公开(公告)日：2024-08-01
申请号：US18390725
申请日：2023-12-20
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Yu KATAOKA , Shotaro HIRATA , Yumi MURATA
Abstract: An optical waveguide device including an optical waveguide formed on a substrate is provided, in which a directional coupler is disposed in a part of the optical waveguide, the directional coupler includes one center waveguide and two side waveguides disposed to interpose the center waveguide between the side waveguides, the side waveguides are disposed to come close to the center waveguide from a position where the side waveguides are separated from the center waveguide and then to be separated again from the center waveguide in a traveling direction of a light wave, and the center waveguide and the side waveguides are not in contact with each other.
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2.发明公开公开(公告)号：US20240230993A9
公开(公告)日：2024-07-11
申请号：US18279021
申请日：2021-09-30
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Yumi MURATA , Yuki KUGIMOTO
IPC: G02B6/122
CPC classification number: G02B6/1228 , G02B2006/12097
Abstract: An optical waveguide device in which an optical loss is reduced by removing an air bubble inside an adhesive layer for joining a reinforcing member from near an optical waveguide or the like even in a case where a protruding part such as a rib type optical waveguide or a spot size converter is formed on an optical waveguide substrate is provided. An optical waveguide device includes an optical waveguide substrate (1, 2) provided with an optical waveguide (10, 12), and a reinforcing member (3) disposed on an upper side of the optical waveguide (10, 12) near an end portion of the optical waveguide (10, 12), the optical waveguide substrate (1, 2) and the reinforcing member (3) being joined through an adhesive layer (4), in which a protective layer (13) that covers the optical waveguide (10, 12) is provided on the optical waveguide (10, 12) positioned on a lower side of the reinforcing member (3), and the adhesive layer (4) is disposed outside the protective layer (13).
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Patent Agency Ranking
公开(公告)号：US20250155637A1
公开(公告)日：2025-05-15
申请号：US18840692
申请日：2022-02-28
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Yumi MURATA , Junji ARAI , Yuki KUGIMOTO
Abstract: An object of the present invention is to provide an optical waveguide device capable of appropriately setting a positional relationship between an optical waveguide substrate and a reinforcing member. An optical waveguide device includes an optical waveguide substrate 11 provided with an optical waveguide 10; and a reinforcing member 2 disposed on an upper side of the optical waveguide near an end portion of the optical waveguide, the optical waveguide substrate and the reinforcing member being joined through an adhesive layer 3, in which spacers (SP1, SP2) are disposed between the optical waveguide substrate and the reinforcing member to interpose the optical waveguide between the spacers.
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公开(公告)号：US20240176071A1
公开(公告)日：2024-05-30
申请号：US18283764
申请日：2022-03-30
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Junji ARAI , Yumi MURATA , Yuki KUGIMOTO
CPC classification number: G02B6/122 , G02B2006/12142
Abstract: Provided is an optical waveguide element whereby it is possible to prevent dropout of an optical component due to internal stress that occurs in a joint between the optical component and an optical waveguide member including a substrate on which an optical waveguide is formed, and to simplify a manufacturing step pertaining to polishing of a joining surface. An optical waveguide element comprising: an optical waveguide member including a substrate 1 on which an optical waveguide is formed; and an optical component 3 that is fixed to an optical waveguide member end surface (B0) on which an input part or an output part of the optical waveguide is disposed, and that transmits input light inputted to the input part or transmits output light outputted from the output part, wherein the optical waveguide element is characterized in that portions (B1, B2) having greater roughness than the end surface (B0) of the optical waveguide member including the input part or the output part are provided in at least a portion of the optical waveguide member, which is the portion thereof to which the optical component 3 is fixed.
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5.发明公开公开(公告)号：US20240134117A1
公开(公告)日：2024-04-25
申请号：US18279021
申请日：2021-09-29
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Yumi MURATA , Yuki KUGIMOTO
IPC: G02B6/122
CPC classification number: G02B6/1228 , G02B2006/12097
Abstract: An optical waveguide device in which an optical loss is reduced by removing an air bubble inside an adhesive layer for joining a reinforcing member from near an optical waveguide or the like even in a case where a protruding part such as a rib type optical waveguide or a spot size converter is formed on an optical waveguide substrate is provided. An optical waveguide device includes an optical waveguide substrate (1, 2) provided with an optical waveguide (10, 12), and a reinforcing member (3) disposed on an upper side of the optical waveguide (10, 12) near an end portion of the optical waveguide (10, 12), the optical waveguide substrate (1, 2) and the reinforcing member (3) being joined through an adhesive layer (4), in which a protective layer (13) that covers the optical waveguide (10, 12) is provided on the optical waveguide (10, 12) positioned on a lower side of the reinforcing member (3), and the adhesive layer (4) is disposed outside the protective layer (13).
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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).
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公开(公告)号：US20210199996A1
公开(公告)日：2021-07-01
申请号：US17129576
申请日：2020-12-21
Applicant: Sumitomo Osaka Cement Co., Ltd.
Inventor： Yuki KUGIMOTO , Yumi MURATA , Katsutoshi KONDO
Abstract: An optical waveguide device including an optical waveguide substrate that has an electro-optic effect, is a crystal having anisotropy in thermal expansion rate, has a thickness set to 10 μm or lower, and includes an optical waveguide and a holding substrate that holds the optical waveguide substrate, the optical waveguide substrate and the holding substrate being joined to each other, in which the holding substrate is formed of a crystal having a lower dielectric constant than the optical waveguide substrate and having anisotropy in thermal expansion rate, and the optical waveguide substrate and the holding substrate are joined to each other such that differences in thermal expansion rate between the optical waveguide substrate and the holding substrate become small in different axial directions on a joint surface.
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