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11.发明公开公开(公告)号：US20240184181A1
公开(公告)日：2024-06-06
申请号：US18550472
申请日：2022-08-25
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Norikazu Miyazaki , Toru Sugamata
CPC classification number: G02F1/2255 , G02F1/212
Abstract: An optical waveguide device including: an optical waveguide composed of a protruding portion extending on a substrate; a signal electrode that is formed on the substrate and controls light waves propagating through the optical waveguide, in which the optical waveguide includes a Mach-Zehnder optical waveguide including two parallel waveguides having curved portions, the signal electrode includes two signal lines for transmitting a differential signal, respectively intersecting the two parallel waveguides at the curved portions, and in an intersection region, which is a region on the substrate where the two signal lines and the two parallel waveguides intersect, at least one of the two signal lines has a signal propagation velocity faster than in a portion other than the intersection region or one of the two signal lines has a signal propagation velocity faster than an other signal line.
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12.发明公开公开(公告)号：US20230367147A1
公开(公告)日：2023-11-16
申请号：US18245977
申请日：2021-09-24
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Norikazu Miyazaki , Toru Sugamata
IPC: G02F1/035
CPC classification number: G02F1/0356 , G02F2201/063 , G02F2202/20
Abstract: The optical absorption loss of the optical waveguide and the signal propagation loss of the high-frequency signal electrode are both reduced at a plurality of intersections between the convex optical waveguide and the high-frequency signal electrode, thereby achieving good operating characteristics. An optical waveguide device includes a substrate on which optical waveguides are formed, and an electrode that is formed on the substrate and has intersections crossing over the optical waveguides, in which the optical waveguides are configured by protruding portions extending on the substrate, and an intermediate layer made of a resin is provided at the adjacent intersections along the electrode to fill spaces between the protruding portions along the electrode and covers top of the protruding portions.
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公开(公告)号：US20210157176A1
公开(公告)日：2021-05-27
申请号：US17256396
申请日：2019-06-28
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Norikazu Miyazaki , Toru Sugamata
Abstract: To suppress characteristic fluctuations and or the degradation of long-term reliability attributed to the disposition of a heat-generating electronic component close to an optical modulator. An optical modulation element including an optical waveguide and a housing are provided, the housing has a bottom surface wall having a quadrilateral shape in a plan view, a first short side wall and a second short side wall that are connected to two opposite edges of the bottom surface wall, and a first long side wall and a second long side wall that are longer than the first short side wall and the second short side wall and are connected to two other opposite edges of the bottom surface wall, a light input terminal portion that holds an input optical fiber and a light output terminal portion that holds an output optical fiber are both fixed to the first short side wall, and the housing has a high-thermal resistance portion having a higher thermal resistance than a housing portion other than an optical input and output region in at least a part of the optical input and output region that is a range from an outer surface of the first short side wall to the first end portion of the optical modulation element that faces the first short side wall.
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公开(公告)号：US20210149268A1
公开(公告)日：2021-05-20
申请号：US17256394
申请日：2019-06-28
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Norikazu Miyazaki , Toru Sugamata
Abstract: An optical modulator has an optical modulation element including optical waveguides and a housing that accommodates the optical modulation element. The housing has a bottom surface wall having a quadrilateral shape in a plan view, first and second long side walls that are connected to two opposite edges of the bottom surface wall, and first and second short side walls, shorter than the long side walls, and connected to two other opposite edges of the bottom surface wall. The optical modulation element is accommodated in a space surrounded by the bottom surface wall and the side walls. The second long side wall has a wall thickness that is equal to or larger than that of the first long side wall, and at least one of the first and second short side walls has a wall thickness that is thinner than that of the first long side wall.
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公开(公告)号：US10816831B2
公开(公告)日：2020-10-27
申请号：US16294377
申请日：2019-03-06
Applicant: Sumitomo Osaka Cement Co., Ltd.
Inventor： Minoru Shinozaki , Toru Sugamata
Abstract: An optical modulator using an optical modulation element in which an optical waveguide and a plurality of electrodes for controlling light waves propagating through the optical waveguide are formed on a substrate, in which at least one stress relieving structure is provided on an upper surface of the electrode opposite to a surface of the substrate in order to relieve stress generated due to pressure applied at the time of wire-bonding of a metal wire.
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Patent Agency Ranking
公开(公告)号：US10268057B2
公开(公告)日：2019-04-23
申请号：US15851851
申请日：2017-12-22
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Kei Katou , Toru Sugamata
Abstract: An optical modulator includes: an optical modulation element which is accommodated in a housing and has a signal electrode; a lead pin for inputting a high-frequency signal; a relay substrate in which a conductor pattern which electrically connects the lead pin and the signal electrode is formed; and a conductive extension portion which extends along a length direction of the lead pin in a range which includes at least a position of a connection portion between the lead pin and the conductor pattern, in which the extension portion is electrically connected to the housing.
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公开(公告)号：US20180284558A1
公开(公告)日：2018-10-04
申请号：US15893849
申请日：2018-02-12
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Norikazu Miyazaki , Yoichi Hosokawa , Toru Sugamata
CPC classification number: G02F1/2257 , G02B6/12004 , G02B6/42 , G02B2006/1204 , G02F1/0316
Abstract: A waveguide optical element which includes a plurality of optical waveguides provided on a substrate having an electro-optic effect includes: a plurality of signal electrodes controlling light waves propagating through the optical waveguides; and a plurality of ground electrodes provided so as to interpose each of the signal electrodes therebetween, in which at least one of the ground electrodes includes a first layer and a second layer formed on the first layer, the second layer is formed such that a distance between the second layer and the signal electrode adjacent to the second layer is larger than a distance between the first layer and said signal electrode adjacent to said second layer, and a thickness of the ground electrode which includes the first layer and the second layer is 25 μm or more.
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公开(公告)号：US11644734B2
公开(公告)日：2023-05-09
申请号：US17276614
申请日：2019-07-03
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Norikazu Miyazaki , Toru Sugamata
CPC classification number: G02F1/225 , G02F1/212 , G02F2202/20
Abstract: An optical modulator includes an optical modulation element including an optical waveguide formed on a substrate and a housing that accommodates the optical modulation element, the housing has a bottom surface wall having a quadrilateral shape in a plan view, first and second long side walls that are connected to two opposite edges of the bottom surface wall, and first and second short side walls that are shorter than the first and second long side walls and are connected to two other opposite edges of the bottom surface wall. An average wall thickness of the second long side wall is equal to or larger than an average wall thickness of the first long side wall. At least one of the first and second short side walls has an average thickness that is thinner than the average thickness of the first long side wall.
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公开(公告)号：US11500263B2
公开(公告)日：2022-11-15
申请号：US17256394
申请日：2019-06-28
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Norikazu Miyazaki , Toru Sugamata
Abstract: An optical modulator has an optical modulation element including optical waveguides and a housing that accommodates the optical modulation element. The housing has a bottom surface wall having a quadrilateral shape in a plan view, first and second long side walls that are connected to two opposite edges of the bottom surface wall, and first and second short side walls, shorter than the long side walls, and connected to two other opposite edges of the bottom surface wall. The optical modulation element is accommodated in a space surrounded by the bottom surface wall and the side walls. The second long side wall has a wall thickness that is equal to or larger than that of the first long side wall, and at least one of the first and second short side walls has a wall thickness that is thinner than that of the first long side wall.
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公开(公告)号：US11194181B2
公开(公告)日：2021-12-07
申请号：US17256396
申请日：2019-06-28
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Norikazu Miyazaki , Toru Sugamata
Abstract: An optical modulator including an optical modulation element including an optical waveguide formed on a substrate, and a housing that accommodates the optical modulation element. The housing has a high-thermal resistance portion within at least a part of an optical input and output region. The optical input and output region is an area ranging from an outer surface of a first short side wall to a first end portion of the optical modulation element, and the high-thermal resistance portion having a higher thermal resistance than a portion of the housing other than the optical input and output region.
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