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公开(公告)号：US10348007B2
公开(公告)日：2019-07-09
申请号：US15906511
申请日：2018-02-27
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Toshio Kataoka , Kei Katou
Abstract: There is provided an optical control element module including: an optical control element having an optical waveguide and a control electrode on a substrate and disposed in a housing; an electrical connection part which is electrically connected to the control electrode, extends along a direction intersecting a plane on which the control electrode of the substrate is disposed, and is disposed in the housing; and a wiring substrate which has an input signal line electrically connected to the electrical connection part, at least a part of which is disposed outside the housing, in which impedance of the electrical connection part is set to be smaller than impedance of the input signal line.
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公开(公告)号：US10091881B1
公开(公告)日：2018-10-02
申请号：US15924378
申请日：2018-03-19
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Toshio Kataoka , Kei Katou
Abstract: An optical device includes a connection pad, which is connected to a conductor pattern on the circuit substrate, at one edge. The connection pad includes one ground pad, and two or more signal pads between which the ground pad is interposed from its both sides. The ground pad includes a concave portion including an opening at the edge. The circuit substrate is provided with a metal columnar member in the conductor pattern to which the ground pad is connected. The conductor pattern and the connection pad are fixed to each other with solder in a state in which the columnar member is fitted into the concave portion. Solder, which gradually rises from the ground pattern to a lateral surface of the columnar member, is formed between the columnar member and the ground pattern that is formed in the flexible printed circuit.
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公开(公告)号：US10025121B2
公开(公告)日：2018-07-17
申请号：US15129857
申请日：2015-03-27
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Kei Katou , Norikazu Miyazaki , Youichi Hosokawa
Abstract: An optical waveguide element module decreases discontinuity of electrical connection between an optical waveguide element and a relay substrate, without wire-bonding using long wires. An edge shape L of the signal electrode side of the ground electrode is surrounded by two shapes (L1, L2). Shape L1 is obtained by connecting an input end of the control electrode to a location where a space between the ground electrodes becomes W2. Shape L2 is such that an impedance change of the control electrode from the input end to the location at which the space between the ground electrodes becomes W2 is constant or continuously changes. A space between grounding wires connecting the ground electrodes of the element and ground lines of the relay substrate is larger than a space between the ground electrodes. In an embodiment, a terminal substrate and an output end of the control electrode are connected.
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公开(公告)号：US09897825B2
公开(公告)日：2018-02-20
申请号：US15468115
申请日：2017-03-24
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Kei Katou , Norikazu Miyazaki , Ryo Shimizu
CPC classification number: G02F1/0327 , G02F1/035 , G02F2201/07 , G02F2201/58
Abstract: An optical modulator includes a substrate having an electro-optic effect, an optical waveguide that is formed in the substrate, and a modulation electrode (not illustrated) for modulating a light wave that propagates through the optical waveguide. In the optical modulator, a light-receiving element is disposed on the substrate, and the light-receiving element includes a light-receiving section that receives a light wave that propagates through the optical waveguide, and the light-receiving section is located on the downstream side of a center of the light-receiving element in a light wave propagating direction.
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公开(公告)号：US09869888B2
公开(公告)日：2018-01-16
申请号：US15468118
申请日：2017-03-24
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Kei Katou , Norikazu Miyazaki , Ryo Shimizu
CPC classification number: G02F1/0327 , G02F1/0322 , G02F1/225 , G02F2001/212 , G02F2201/58
Abstract: In an optical modulator, a light-receiving element (3a) that receives a light wave modulated in an optical modulation section (Ma) and a light-receiving element (3b) that receives a light wave modulated in an optical modulation section (Mb) are provided in a substrate. In addition, at least a part of an electrical line (4a) that guides a light-receiving signal output from the light-receiving element (3a) to an outer side of the substrate, and at least apart of an electrical line (4b) that guides a light-receiving signal form the light-receiving element (3b) to an outer side of the substrate are formed in the substrate. In addition, crosstalk suppression means (5), which suppress crosstalk between the electrical line (4a) and the electrical line (4b), is provided between the part of the electrical line (4a) and the part of the electrical line (4b) which are formed in the substrate.
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Patent Agency Ranking
公开(公告)号：US20170307911A1
公开(公告)日：2017-10-26
申请号：US15515831
申请日：2015-12-24
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Norikazu Miyazaki , Toshio Kataoka , Youichi Hosokawa , Kei Katou
CPC classification number: G02F1/03 , G02B26/02 , G02F1/0121 , G02F1/0126 , G02F1/025 , G02F1/035 , G02F1/3133 , G02F2203/21
Abstract: Provided is an optical modulator in which low-voltage drive and a stable modulation characteristic are secured over a wide bandwidth. An optical modulator includes: a substrate 10; an optical waveguide (not shown) formed in the substrate 10; a modulation electrode (a signal electrode 11 and a ground electrode 12) for modulating light waves propagating through the optical waveguide; and an external signal line (not shown, only a connection connector 4 is shown) which is provided outside the substrate and supplies a modulation signal to the modulation electrode, in which an impedance value of the modulation electrode in an active region S in which an electric field formed by the modulation electrode is applied to the optical waveguide is set to be lower than an impedance value of the external signal line, and an impedance adjustment part 21 having an impedance adjustment function with respect to mainly a modulation signal in a low-frequency area and configured of a lumped-constant circuit, and an impedance matching line L having an impedance adjustment function with respect to mainly a modulation signal in a high-frequency area are disposed between the external signal line and the active region of the modulation electrode.
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公开(公告)号：US11022763B2
公开(公告)日：2021-06-01
申请号：US16364603
申请日：2019-03-26
Applicant: Sumitomo Osaka Cement Co., Ltd.
Inventor： Tokutaka Hara , Kei Katou
Abstract: An optical module in which an optical element is housed in a housing includes: an optical window member through which input light to the optical element or output light from the optical element passes and which hermetically seals inside of the housing; and a holding member that holds the optical window member. The optical window member is fixed to the housing by the holding member. A difference between linear expansion coefficients of the holding member and the optical window member is smaller than a difference between linear expansion coefficients of the housing and the optical window member. A position where the optical window member is attached on the holding member protrudes to an optical element side from a position where the holding member itself is fixed.
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公开(公告)号：US10365506B2
公开(公告)日：2019-07-30
申请号：US15755735
申请日：2016-09-27
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Kei Katou , Toshio Kataoka , Junichiro Ichikawa
Abstract: Provided is an optical modulator in which a phenomenon of a resonance mode or the like is prevented from being generated in a recess portion of a housing that mounts a flexible printed circuit and of which broadband characteristics are improved.There is provided an optical modulator in which an optical modulation element is mounted inside a housing, in which at least a portion of an electric line is connected to an external circuit board 7 through a flexible printed circuit 6, and which is disposed on the external circuit board. A recess portion (area indicated with a dotted line D) that mounts the flexible printed circuit is formed on an outer bottom surface of the housing and at a part where the flexible printed circuit is connected, and means for preventing a resonance mode or the like (for example, a corrugated shape 21) is provided such that a resonance mode of a microwave and a millimeter wave or a parallel plate mode is prevented from being generated among a surface A of the recess portion facing the flexible printed circuit, an electric wiring part B provided on the flexible printed circuit overlapping the surface A when seen in a plan view, an electric wiring part C provided on the external circuit board overlapping the surface A when seen in a plan view.
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公开(公告)号：US10078253B2
公开(公告)日：2018-09-18
申请号：US15515614
申请日：2016-03-29
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Youichi Hosokawa , Norikazu Miyazaki , Kei Katou
CPC classification number: G02F1/2255 , G02F1/0344 , G02F1/035 , G02F1/225 , G02F2001/212
Abstract: Provided is an optical modulator in which even in a case where an optical waveguide and a control electrode are highly integrated, a distortion due to stress acting on the optical waveguide from lead-out wiring of a signal electrode is mitigated and occurrence of a temperature drift or the like is suppressed. An optical modulator includes: a substrate 1 having an electro-optic effect; optical waveguides (L1 to L4), each of which is formed on the substrate and provided with at least one Mach-Zehnder type optical waveguide; and a control electrode which controls light waves propagating through the optical waveguides, in which the control electrode is configured of signal electrodes (S1 and S2) and ground electrodes (G1 to G3), each of the signal electrodes being provided with a pad part (S1P or S2P) for input or output, which is electrically connected to an electric circuit which is provided outside the substrate, an interaction part (indicated by arrow R1) which applies an electric field to the optical waveguide, and a lead-out wiring part which connects the pad part and the interaction part to each other, a portion of the lead-out wiring part is disposed parallel to an extended direction (a lateral direction in FIG. 3) of the Mach-Zehnder type optical waveguide within a range (indicated by arrow R2) in which two branching waveguides configuring the Mach-Zehnder type optical waveguide are present in the extended direction, and any one of a portion of the interaction part, another portion of the lead-out wiring part, and a stress relaxation structure of the ground electrode is formed at a position which is axially symmetrical to the portion of the lead-out wiring part with respect to a centrosymmetric axis in the extended direction of the Mach-Zehnder type optical waveguide.
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公开(公告)号：US09897826B2
公开(公告)日：2018-02-20
申请号：US15468116
申请日：2017-03-24
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Kei Katou , Norikazu Miyazaki , Ryo Shimizu
CPC classification number: G02F1/0327 , G02F1/0322 , G02F1/035 , G02F1/225 , G02F2001/212 , G02F2201/58
Abstract: In an optical modulator, a light-receiving element, and an output port are disposed in a substrate. In addition, at least a part of an electrical line, which electrically connects the light-receiving element and the output port to each other, is formed in the substrate. In addition, a plurality of the optical modulation sections are provided. In addition, among a plurality of the light-receiving elements which are provided to the optical modulation sections, at least one light-receiving element is disposed at a position different from positions of the other light-receiving elements in a light wave propagating direction. A plurality of the output ports are disposed in an arrangement in the light wave propagating direction in correspondence with an arrangement of the plurality of the light-receiving elements in the light wave propagating direction.
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