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公开(公告)号：US12189265B2
公开(公告)日：2025-01-07
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：US20220342241A1
公开(公告)日：2022-10-27
申请号：US17764022
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 that is configured to generate two modulated light beams, each of which is modulated by two sets of electrical signals, and that includes a plurality of signal electrodes; a plurality of signal input terminals, each of which inputs an electrical signal; a relay substrate on which a plurality of signal conductor patterns and a plurality of ground conductor patterns are formed, the relay substrate being configured to propagate the two sets of electrical signals by two pairs of the adjacent signal conductor patterns; and a housing, in which the at least two signal conductor patterns including at least one parts mounting part including electrical circuit elements are configured such that first signal propagation directions, which are signal propagation directions at the parts mounting parts, are different from each other.
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公开(公告)号：US11029577B2
公开(公告)日：2021-06-08
申请号：US16665218
申请日：2019-10-28
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 housing that houses the optical modulation element; a plurality of signal input terminals each of which inputs an electrical signal to be applied to each of the signal electrodes; and a relay substrate on which a plurality of signal conductor patterns that electrically connect each of the signal input terminals to each of the signal electrodes, and a plurality of ground conductor patterns are formed, in which the relay substrate is housed in the housing, and at least one input side ground conductor pattern extending from at least one of the ground conductor patterns is formed on an input side surface having a side on which an electrical signal output from the signal input terminal is input to the signal conductor pattern as one side.
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公开(公告)号：US10935821B2
公开(公告)日：2021-03-02
申请号：US16088066
申请日：2017-04-03
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Toru Sugamata
Abstract: Provided is an optical modulator capable of effectively dispersing and releasing heat generated by termination resistors, improving the reliability of a termination substrate including the termination resistors, and reducing influence of heat on an optical waveguide. In an optical modulator including an optical waveguide substrate on which an optical waveguide is formed, a signal electrode is provided on the optical waveguide substrate for applying an electric field, a termination resistor terminating the signal electrode, and a termination substrate on which the termination resistor is disposed, at least a plurality of the termination resistors are provided for a single termination substrate, and for preventing heat generated by the termination resistor from being concentrated on a local portion in the termination substrate or conducted to the optical waveguide substrate, a ground electrode provided on the termination substrate and electrically connected to the termination resistor is formed to be thicker than 0.1 μm.
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公开(公告)号：US20200379278A1
公开(公告)日：2020-12-03
申请号：US16961413
申请日：2019-01-11
Applicant: SUMITOMO OSAKA CEMENT CO., LTD
Inventor： Norikazu Miyazaki , Toru Sugamata
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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Patent Agency Ranking
公开(公告)号：US10595398B2
公开(公告)日：2020-03-17
申请号：US15770649
申请日：2016-09-15
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Norikazu Miyazaki , Toru Sugamata
Abstract: To suppress peeling-off or cracks of a solder-fixing portion, which are caused by vibration during transportation or operation, in an optical modulator with FPC, thereby suppressing deterioration of radio-frequency characteristics of a signal path in an effective manner at low cost.An optical modulator 100 includes a flexible printed circuit (106) that performs electrical connection with a circuit substrate. The flexible printed circuit has a substantially quadrilateral shape. In the flexible printed circuit, a pad (210 and the like), which is electrically connected to the circuit substrate, is provided along one side of the substantial quadrilateral. In addition, in the flexible printed circuit, signal patterns (220 and the like), which are connected to signal lead pins (120 and the like) for signal transmission which is provided in the optical modulator, are provided in another side opposite to the one side. In addition, the flexible printed circuit includes an additional fixing portion (240 and the like) and/or a notched portion (810 and the like) which are configured to increase a natural vibration frequency of the flexible printed circuit in a state of being connected to the signal lead pin and the circuit substrate.
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公开(公告)号：US10571722B2
公开(公告)日：2020-02-25
申请号：US16016661
申请日：2018-06-25
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Norikazu Miyazaki , Toru Sugamata
IPC: G02F1/01
Abstract: An optical modulation element configured by forming an optical waveguide on an optical element substrate and a polarization-combining part that combines light waves modulated in the optical modulation element are disposed in a housing. A plurality of lead pins are fixed to a side wall of the housing. Each of the plurality of lead pins has a protrusion portion protruding into an internal space of the housing and is electrically connected to the optical modulation element by bonding a wire to the protrusion portion. A loop shape of a wire that is bonded and connected to at least part of the lead pins among the plurality of lead pins is different from a loop shape of a wire that is bonded and connected to other lead pins.
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公开(公告)号：US10473999B2
公开(公告)日：2019-11-12
申请号：US16084236
申请日：2017-04-24
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Norikazu Miyazaki , Toru Sugamata
Abstract: In an optical modulator including an FPC for performing electrical connection with an external circuit substrate, to maintain high light transmission quality by appropriately driving the optical modulator even when the reflection of a radio frequency signal occurs in a connection portion between the FPC and the main body of the optical modulator. Provided is an optical modulator including a flexible printed circuit for performing electrical connection with a circuit substrate, in which the flexible printed circuit includes at least one wire pattern for propagating a radio frequency signal, and the wire pattern includes at least one radio frequency attenuation portion for attenuating power of the radio frequency signal by a predetermined amount.
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公开(公告)号：US12210232B2
公开(公告)日：2025-01-28
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：US12147097B2
公开(公告)日：2024-11-19
申请号：US17764022
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 that is configured to generate two modulated light beams, each of which is modulated by two sets of electrical signals, and that includes a plurality of signal electrodes; a plurality of signal input terminals, each of which inputs an electrical signal; a relay substrate on which a plurality of signal conductor patterns and a plurality of ground conductor patterns are formed, the relay substrate being configured to propagate the two sets of electrical signals by two pairs of the adjacent signal conductor patterns; and a housing, in which the at least two signal conductor patterns including at least one parts mounting part including electrical circuit elements are configured such that first signal propagation directions, which are signal propagation directions at the parts mounting parts, are different from each other.
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