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公开(公告)号：US20220357605A1
公开(公告)日：2022-11-10
申请号：US17619824
申请日：2020-06-18
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 input signal terminals and signal electrodes of an optical modulation element and ground conductor patterns, and a housing that accommodates the optical modulation element and the relay substrate. Regarding at least one signal conductor pattern, the two ground conductor patterns sandwiching the signal conductor pattern are formed in an asymmetrical shape in a plan view in a rectangular connection area including a signal connection portion at which the signal conductor pattern and the input signal terminal are connected. The connection area is centered on the at least one signal conductor pattern in a width direction, and has a width equal to a distance to the nearest adjacent signal conductor pattern and a height equal to a distance from an end of the signal connection portion farthest from a signal input side to the signal input side.
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公开(公告)号：US11156857B2
公开(公告)日：2021-10-26
申请号：US16961413
申请日：2019-01-11
Applicant: SUMITOMO OSAKA CEMENT CO., LTD
Inventor： Norikazu Miyazaki , Toru Sugamata
IPC: G02F1/035 , G02F1/05 , G02F1/055 , G02F1/1362
Abstract: An initial change and a secular change in an optical characteristic and a high frequency characteristic in a case where an optical modulator is mounted in a package of an optical transmission apparatus are suppressed while improving a space utilization rate in the package of the optical transmission apparatus. An optical modulator that is electrically connected to an electric circuit configured on a circuit board, includes a package that houses an optical modulation element, in which the package has, on a bottom surface facing the circuit board, a plurality of first protruding bodies protruding from the bottom surface.
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公开(公告)号：US20210026217A1
公开(公告)日：2021-01-28
申请号：US17042225
申请日：2019-02-01
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Norikazu Miyazaki , Toru Sugamata
IPC: G02F1/225
Abstract: An optical modulator that can effectively dissipate heat generated from the inside includes: an optical modulation element which includes an optical ave aide and a radio frequency electrode for controlling light waves propagating through the optical waveguide; a termination resistor electrically connected to the radio frequency electrode; a termination resistor board on which the termination resistor is disposed; and a package case, which houses the optical modulation element and the termination resistor board, in which a plurality of protrusion portions are formed on one external surface of the package case, and at least one of the protrusion portions is formed at a position on the external surface of the package case, which faces a position inside the package case where the termination resistor board is disposed with the package case in between.
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公开(公告)号：US10473998B2
公开(公告)日：2019-11-12
申请号：US15851827
申请日：2017-12-22
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Toru Sugamata , Norikazu Miyazaki
Abstract: An optical modulator includes: an optical modulation element which includes signal electrodes; lead pins; and a relay substrate in which a conductor pattern which electrically connects each of the lead pins and each of the signal electrodes to each other are formed, and the optical modulator is configured such that the amount of radiation of a high frequency at a connection portion between the conductor pattern and the signal electrode is increased compared to a portion other than the connection portion.
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公开(公告)号：US10416527B2
公开(公告)日：2019-09-17
申请号：US15927496
申请日：2018-03-21
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Minoru Shinozaki , Toru Sugamata
Abstract: An optical modulator includes an optical modulation element that is accommodated in a housing. A plurality of lead pins, which are electrically connected to the optical modulation element through wire bonding, are fixed to a lateral wall of the housing. Each of the plurality of lead pins includes a portion that protrudes into an inner space (inner surface side) of the housing. A resonance suppressing structure (for example, a concave portion), which is configured to suppress resonance between the lead pins, is provided in a lateral wall portion to which the plurality of lead pins are fixed.
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Patent Agency Ranking
公开(公告)号：US10386659B2
公开(公告)日：2019-08-20
申请号：US15555605
申请日：2016-09-16
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Norikazu Miyazaki , Toru Sugamata
Abstract: To perform a stable bias control by improving detection accuracy of intensity of an dither signal component, which is detected by a photo detector, in an optical modulator including a bias electrode to which a dither signal is applied, and a photo detector that monitors an optical signal propagating through the inside of an optical waveguide in the same substrate. The optical modulator includes: a substrate having a piezoelectric effect (102); an optical waveguide (116a or the like) that is formed on the substrate; a bias electrode (158a or the like) that controls an optical wave that propagates through the optical waveguide; and a photo detector (168a or the like) that is formed on the substrate, and monitors an optical signal that propagates along the optical waveguide. At least one suppressing unit (190 or the like), which suppresses a surface acoustic wave that propagates from the bias electrode to the photo detector, is disposed between a region in which the bias electrode is formed and a portion in which the photo detector is disposed on the substrate.
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公开(公告)号：US10310299B2
公开(公告)日：2019-06-04
申请号：US15948812
申请日：2018-04-09
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Toru Sugamata
Abstract: A substrate (102) having a piezoelectric effect, optical waveguides (138a, 140a, 138b, 140b, and the like) formed on the substrate, and a plurality of bias electrodes (152a, 152b, and the like) that control an optical wave (s) which propagate through the optical waveguides are provided, and the bias electrodes are constituted and/or disposed such that an electrical signal applied to one of the bias electrodes is prevented from being received by another one of the bias electrodes through a surface acoustic wave.
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公开(公告)号：US09977266B2
公开(公告)日：2018-05-22
申请号：US15441733
申请日：2017-02-24
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Toru Sugamata
CPC classification number: G02F1/0123 , G02F1/0327 , G02F1/035 , G02F1/225 , G02F1/2257 , G02F2001/212 , G02F2201/12 , G02F2202/20
Abstract: A substrate (102) having a piezoelectric effect, optical waveguide (138a, 140a, 138b, 140b, and the like) formed on the substrate, and a plurality of bias electrodes (152a, 152b, and the like) that control an optical wave (s) which propagate through the optical waveguides are provided, and the bias electrodes are constituted and/or disposed such that an electrical signal applied to one of the bias electrodes is prevented from being received by another one of the bias electrodes through a surface acoustic wave.
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39.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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