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公开(公告)号：US12197052B2
公开(公告)日：2025-01-14
申请号：US17593931
申请日：2019-09-27
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Yu Kataoka , Norikazu Miyazaki
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.
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2.发明公开公开(公告)号：US20240319558A1
公开(公告)日：2024-09-26
申请号：US18258272
申请日：2021-12-23
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Norikazu Miyazaki , Toru Sugamata
CPC classification number: G02F1/2252 , G02F1/0121 , G02F1/212 , G02F1/2255
Abstract: In an optical waveguide device having a plurality of intersections between a convex optical waveguide and a signal electrode, the generation of disturbance modulation at the intersections is effectively reduced, thereby achieving good operating characteristics. An optical waveguide device includes a substrate on which an optical waveguide is formed, an intermediate layer formed on the substrate, and a signal electrode and a ground electrode formed on the intermediate layer, in which the optical waveguide includes a protruding portion extending on the substrate, the signal electrode has an action portion that extends along the optical waveguide and controls a light wave propagating through the optical waveguide, and an intersection that crosses over the optical waveguide, and the intermediate layer is formed such that a thickness at the intersection is thicker than a thickness at the action portion.
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公开(公告)号：US20240142848A1
公开(公告)日：2024-05-02
申请号：US18493538
申请日：2023-10-24
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Norikazu Miyazaki , Toru Sugamata
CPC classification number: G02F1/2255 , G02F1/0121 , G02F1/0356 , G02F1/212
Abstract: An optical modulator includes an optical waveguide device including an optical waveguide and a signal electrode for controlling a light wave propagating through the optical waveguide, a drive circuit that outputs two high-frequency signals, and two termination resistors for respectively terminating the two high-frequency signals, in which one high-frequency signal among the high-frequency signals output from the drive circuit propagates through the signal electrode of the optical waveguide device and is terminated by a first termination resistor that is one of the termination resistors, an other high-frequency signal among the high-frequency signals output from the drive circuit is terminated by a second termination resistor that is an other one of the termination resistors, a resistance value of the first termination resistor is lower than a resistance value of the second termination resistor, and the signal electrode includes a plurality of sections having constant impedances different from each other.
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4.发明公开公开(公告)号：US20230258967A1
公开(公告)日：2023-08-17
申请号：US18012021
申请日：2021-08-03
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Norikazu Miyazaki , Toru Sugamata
CPC classification number: G02F1/0356 , G02F1/212 , G02B6/4206
Abstract: In an optical waveguide device using a convex optical waveguide, the absorption loss of guided light at an intersection between an optical waveguide and an electrode is reduced, without deteriorating optical characteristics and reducing long-term reliability. Provided is an optical waveguide device including a substrate on which an optical waveguide is formed, and an electrode having an intersection crossing over the optical waveguide on the substrate, in which the optical waveguide is formed with a protruding portion extending on the substrate, a resin layer is provided between the optical waveguide and the electrode at the intersection, the resin layer is formed to cover an upper surface and a side surface of the protruding portion of the optical waveguide, and in a cross section along a width direction of the optical waveguide, a boundary with the electrode is formed with a curve.
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公开(公告)号：US20220334415A1
公开(公告)日：2022-10-20
申请号：US17763959
申请日：2020-09-15
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Norikazu Miyazaki , Toru Sugamata
Abstract: An optical modulator includes: an optical modulation element including a plurality of signal electrodes and generating two modulated light beams, each of which is modulated by two sets of electrical signals; a plurality of signal input terminals, each of which inputs an electrical signal; a relay substrate on which a plurality of signal and ground conductor patterns are formed, the relay substrate propagating the two sets of electrical signals by two pairs of the adjacent signal conductor patterns; and a housing, in which at least one signal conductor pattern includes at least one component mounting portion including at least a parallel circuit of a resistor and a capacitor, and the relay substrate includes a metal body connected on the ground conductor pattern or a substrate removal portion that sandwiches a portion of the signal conductor pattern downstream of the component mounting portion along a propagation direction of the electrical signal.
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Patent Agency Ranking
公开(公告)号：US20220291533A1
公开(公告)日：2022-09-15
申请号：US17632627
申请日：2020-08-07
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Norikazu Miyazaki , Toru Sugamata
Abstract: An optical modulator includes a relay substrate having signal conductor patterns that connect signal input terminals and signal electrodes of an optical modulation element and ground conductor patterns, and a housing, in which the signal conductor pattern includes a component mounting portion including an electrical circuit element. Two ground conductor patterns sandwiching the signal conductor pattern are formed in an asymmetrical shape in a plan view within a component mounting area having a square shape in the plan view centered on the component mounting portion. A direction of a side of the component mounting area having the square shape is same as the extending direction of the signal conductor pattern and a length of a side of the component mounting area is equal to a distance from a center of the component mounting portion to a portion on an adjacent signal conductor pattern closest to the center.
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公开(公告)号：US20220146902A1
公开(公告)日：2022-05-12
申请号：US17605690
申请日：2020-04-23
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Norikazu Miyazaki , Toru Sugamata
Abstract: An optical modulator includes an optical modulation element having a plurality of signal electrodes, a plurality of signal input terminals, a relay substrate on which a plurality of signal conductor patterns that electrically connect the signal input terminals and the signal electrodes and a plurality of ground conductor patterns are formed, and a housing. A signal input side and signal output side of the relay substrate face each other in a plan view, and electromagnetic wave propagation suppressing units that are made of a material that absorbs electromagnetic waves and have a height protruding from a surface of the relay substrate are provided, along at least one side of an end portion of the signal input side and an end portion of the signal output side in the plan view.
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公开(公告)号：US11109480B2
公开(公告)日：2021-08-31
申请号：US16261793
申请日：2019-01-30
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Norikazu Miyazaki , Kei Katou , Toshio Kataoka
Abstract: A transmission line has a signal electrode formed on one surface of a flexible printed circuit, and a ground electrode formed on the other surface of the flexible printed circuit. A connection terminal has signal terminals formed on both the surfaces of the flexible printed circuit and electrically connected to each other through a via hole, and ground terminals formed on both the surfaces of the flexible printed circuit and electrically connected to each other through the via hole. The signal terminal on the surface, on which the ground electrode is formed, is formed such that at least a width in an end portion on the transmission line side is narrower than a width of a part of the signal terminal on the surface, on which the signal electrode is formed, to be at the same position when the flexible printed circuit is seen in a plan view.
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公开(公告)号：US10921620B2
公开(公告)日：2021-02-16
申请号：US15719730
申请日：2017-09-29
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Toru Sugamata , Norikazu Miyazaki
Abstract: An optical modulator includes an optical modulation element (102) including a plurality of signal electrodes (112a and the like), a plurality of lead pins (116a and the like) for inputting high frequency signals, and a relay substrate (118) in which conductor patterns (202a and the like) that electrically connect the lead pins and the signal electrodes are formed, and at least one of the conductor patterns in the optical modulator is constituted so that at least one resonant frequency of the at least one of the conductor patterns is different from at least one resonant frequency of at least one of the other conductor patterns.
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公开(公告)号：US10409136B2
公开(公告)日：2019-09-10
申请号：US15514505
申请日：2016-03-10
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Tokutaka Hara , Norikazu Miyazaki
Abstract: Provided is an optical modulator in which degradation of an extinction ratio is suppressed and a temperature drift phenomenon is suppressed.An optical modulator includes: a substrate having an electro-optic effect; an optical waveguide formed on the substrate; and a control electrode for controlling light waves propagating through the optical waveguide, in which the optical waveguide has one or more Mach-Zehnder type optical waveguides (A1 to A3 and B1 to B3), the control electrode has DC electrodes (C1 to C4) which apply DC bias, a feeder electrode which feeds DC bias to the DC electrode crosses one of two branched waveguides of the Mach-Zehnder type optical waveguide, and a first dummy electrode (a dotted line E5 or E6) is provided at a specific position on the other one of the two branched waveguides, which is a specific position symmetrical in relation to a position at which the feeder electrode crosses the one of the two branched waveguides.
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