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公开(公告)号：US20190239352A1
公开(公告)日：2019-08-01
申请号：US16261793
申请日：2019-01-30
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Norikazu MIYAZAKI , Kei KATOU , Toshio KATAOKA
CPC classification number: H05K1/11 , G02F1/0121 , H04B10/27 , H04B10/516 , H05K1/0243 , H05K1/028 , H05K1/181 , H05K2201/10121 , H05K2201/10462
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：US20170255032A1
公开(公告)日：2017-09-07
申请号：US15504254
申请日：2015-08-31
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Toshio KATAOKA , Kei KATO , Junichiro ICHIKAWA
CPC classification number: G02F1/03 , G02F1/0027 , G02F1/025 , G02F1/0316 , G02F1/035 , G02F1/225
Abstract: Provided is an optical modulator including: a relay substrate; a first transmission line that is provided on a flat surface of the relay substrate, and transmits an electrical signal along the flat surface; a second transmission line that is provided separately from the relay substrate, is electrically connected to the first transmission line, and transmits, to the first transmission line, the electrical signal that has been input from an outer side in a direction that is not included in the flat surface; a modulation unit that modulates an optical signal by using the electrical signal that is transmitted by the first transmission line and the second transmission line; and a shield that shields a radiation component of the electrical signal that is radiated from the second transmission line.
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公开(公告)号：US20170299940A1
公开(公告)日：2017-10-19
申请号：US15516028
申请日：2016-04-28
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Toshio KATAOKA , Kei KATO
CPC classification number: G02F1/2257 , G02B6/125 , G02B6/243 , G02B2006/12142 , G02F1/0123 , G02F2001/212
Abstract: The objective of the present invention is to provide an optical modulator adapted for use with various modulating units and various modulation regions, and with which variability in optical losses is limited as far as possible. An optical modulator in which an optical waveguide and a control electrode for controlling an optical wave propagating through the optical waveguide are provided in a substrate, characterized in that: the optical waveguide is provided with a first branching portion which causes one input light beam to branch into two light beams; each of a first and a second modulating portion connected to two branched waveguides which branch at the first branching portion is provided with a structure in which one or more Mach-Zehnder type optical waveguides are combined; the control electrode comprises signal electrodes which apply modulated signals to the first and second modulating portions; input portions of all the signal electrodes are disposed on either the left or the right of the substrate relative to the direction in which the optical wave propagates; and in relation to output portions of the signal electrodes, the output portions of the signal electrodes led out from each modulating portion are disposed on the side on which the first or second modulating portions are disposed, relative to the direction in which the optical wave propagates.
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公开(公告)号：US20170299813A1
公开(公告)日：2017-10-19
申请号：US15515895
申请日：2016-04-28
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Tokutaka HARA , Toshio KATAOKA
CPC classification number: G02B6/2773 , G02B6/024 , G02B6/2706 , G02B6/2766 , G02B27/283
Abstract: Provided is a polarization-combining module in which it is possible to suppress deviation of an optical axis in a polarization-combining optical system and to perform efficient polarization combination with a less optical loss.A polarization-combining module includes: a PBS 4 which combines two linearly polarized lights input and emits the combined light; a λ/2 wavelength plate 3 which is provided on an optical path of at least one of the two linearly polarized lights which are input to the PBS 4, and provides polarization rotation by a predetermined angle to the linearly polarized light that passes therethrough; and a pedestal member 10 on which the λ/2 wavelength plate 3 and the PBS 4 are mounted, in which the pedestal member 10 has a protrusion part 12 which defines mounting positions of the λ/2 wavelength plate 3 and the PBS 4 so as to be separated from each other and be parallel to each other, and the λ/2 wavelength plate 3 and the PBS 4 are mounted on the pedestal member 10 with apart of each of the λ/2 wavelength plate 3 and the PBS 4 being brought into contact with the protrusion part 12.
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公开(公告)号：US20170235207A1
公开(公告)日：2017-08-17
申请号：US15504292
申请日：2015-08-31
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Toshio KATAOKA , Junichiro ICHIKAWA
IPC: G02F1/313
CPC classification number: G02F1/3134 , G02F1/3133
Abstract: Provided is an optical modulator including: a relay substrate; a first transmission line that is provided on a flat surface of the relay substrate, and transmits, along the flat surface of the relay substrate, an electrical signal that has been input from an outer side; a second transmission line that is provided in the relay substrate, and transmits the electrical signal in a direction that is not included in the flat surface; a modulation unit that modulates an optical signal by using the electrical signal that is transmitted by the first transmission line and the second transmission line; and a shield that shields a radiation component of the electrical signal that is radiated from a contact of the first transmission line and the second transmission line.
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Patent Agency Ranking
公开(公告)号：US20230314851A1
公开(公告)日：2023-10-05
申请号：US18022707
申请日：2021-09-29
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Toshio KATAOKA , Norikazu MIYAZAKI
CPC classification number: G02F1/035 , G02F1/212 , G02F1/225 , G02F2202/20
Abstract: It is possible to provide an optical modulator in which a transmission loss from a driver circuit element to a modulation substrate is reduced. An optical modulator includes a modulation substrate (1) that includes an optical waveguide (200) and a modulation electrode (10) for modulating a light wave propagating through the optical waveguide, a driver circuit element (2) that generates a modulation signal to be applied to the modulation electrode (10), and a case (3) that accommodates the modulation substrate (1) and the driver circuit element (2), in which an output terminal (20′) that outputs the modulation signal is provided on an upper surface side of the driver circuit element (2), and a wiring substrate (4) including a wiring that electrically connects the output terminal (20′) and the modulation electrode (10) is disposed above the driver circuit element (2) and the modulation substrate (1) to straddle both the driver circuit element (2) and the modulation substrate (1).
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公开(公告)号：US20190302490A1
公开(公告)日：2019-10-03
申请号：US16364449
申请日：2019-03-26
Applicant: Sumitomo Osaka Cement Co., Ltd.
Inventor： Hideki ICHIMEI , Toshio KATAOKA
IPC: G02F1/035
Abstract: An optical waveguide device module includes an optical waveguide device and a connection substrate provided outside the optical waveguide device, and these are housed in a housing. The optical waveguide device has a control electrode including a signal electrode and ground electrodes disposed to interpose the signal electrode between the ground electrodes. A signal line, ground lines disposed so as to interpose the signal line between the ground lines, and a back surface ground electrode disposed on a surface of the connection substrate are provided on the connection substrate. The ground line and the back surface ground electrode are electrically connected through a via hole passing through the connection substrate. Electrical connection means for electrically connecting the ground line and the ground electrode is provided. A connection portion of the electrical connection means on the ground line side is in the vicinity of the via hole of the ground line.
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公开(公告)号：US20190302489A1
公开(公告)日：2019-10-03
申请号：US16360030
申请日：2019-03-21
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Masayuki MOTOYA , Toshio KATAOKA
Abstract: An optical modulator includes a substrate, an optical waveguide, a control electrode applying a high frequency signal in order to modulate light waves propagating through the optical waveguide, and a relay substrate provided with a relay line to transfer the high frequency signal to the control electrode. The control electrode and the relay line together have a coplanar line structure inclusive of at least electrical connection portions of both the control electrode and the relay line. The control electrode includes an electrical connection portion and a routing portion positioned between the electrical connection portion and an active portion applying an electrical field to the optical waveguide. The routing portion has a coplanar line structure. A distance between ground electrodes sandwiching a signal electrode in the electrical connection portion of the control electrode is substantially equal to a distance between ground electrodes sandwiching a signal electrode of the routing portion.
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9.发明公开公开(公告)号：US20240168225A1
公开(公告)日：2024-05-23
申请号：US18284270
申请日：2022-03-30
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Toshio KATAOKA , Norikazu MIYAZAKI
CPC classification number: G02B6/122 , G02B2006/12097 , G02B2006/12142
Abstract: A method of roughening the upper surface of the slab waveguide includes a method of locally forming roughness using an electron beam and a method of roughening the upper surface via etching. As an etching condition for the rough surface, processing is performed under a condition in which roughness is generated compared to a processing condition for the rib top portion. Particularly, since the surface can be simply locally roughened by etching, the rough surface can be formed much more simply than that of the unnecessary light beam removing unit in Patent Literature No. 1. Roughness of the rough surface is preferably 10 nm or larger in arithmetic average roughness Ra. Roughness of an upper surface of the rib type optical waveguide is normally set to 1 nm or less
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公开(公告)号：US20240160051A1
公开(公告)日：2024-05-16
申请号：US18280906
申请日：2021-09-30
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Toshio KATAOKA , Norikazu MIYAZAKI
IPC: G02F1/01
CPC classification number: G02F1/0121
Abstract: The purpose of the present invention is to provide an optical modulator in which propagation loss related to transmission of a high-frequency signal is reduced. An optical modulator, in which an electro-optical conversion element E/OC and a driver circuit DRV for driving the electro-optical conversion element are housed in the same case CA, includes: a multiplexer MUX that converts an input modulation signal, which is input from an outside of the case, into an output modulation signal having a higher frequency than the input modulation signal, and supplies the output modulation signal to the driver circuit, in which the multiplexer is housed in the case CA.
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