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公开(公告)号：US10698289B2
公开(公告)日：2020-06-30
申请号：US16367738
申请日：2019-03-28
Applicant: Sumitomo Osaka Cement Co., Ltd.
Inventor： Kenta Oisha , Norikazu Miyazaki
Abstract: An optical modulator having a substrate having an electro-optic effect, an optical waveguide formed in the substrate, and a signal electrode and ground electrodes formed on the substrate so as to interpose the optical waveguide, in which the signal electrode and the ground electrodes respectively have a plurality of electrode layers, and an interval between the signal electrode and the ground electrode is larger than a mode field diameter of the optical waveguide in a first layer of the electrode layers closest to the substrate and is smaller than the interval in the first layer of the electrode layers in at least any one of second and upper layers of the electrode layers.
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公开(公告)号：US10558064B2
公开(公告)日：2020-02-11
申请号：US15941026
申请日：2018-03-30
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Norikazu Miyazaki , Kei Katou
Abstract: An optical communication module includes: an optical modulator that includes an optical modulation element housed in a rectangular parallelepiped container; a driver circuit that inputs a high-frequency signal to the optical modulation element; and a housing that houses the optical modulator and the driver circuit. An electrical interface is provided on one lateral surface of the housing, and an optical interface is provided on another lateral surface, which is opposite to the lateral surface, of the housing. In the optical modulator, an end of a wiring substrate, which is configured to introduce the high-frequency signal to the optical modulation element, is led out from one short-side side of the rectangular parallelepiped container, and the driver circuit is disposed between the short-side side of the optical modulator and the electrical interface.
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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：US10416388B2
公开(公告)日：2019-09-17
申请号：US15938145
申请日：2018-03-28
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Yuu Kataoka , Yoichi Hosokawa , Norikazu Miyazaki
Abstract: An optical waveguide device includes a substrate in which an optical waveguide is formed. The optical waveguide has a Y-branched structure in which light beams propagating through a main waveguide are branched into two parts, and a three-branched structure in which the optical waveguide is branched into three waveguides including the main waveguide and two sub-waveguides on both sides of the main waveguide at a front stage of the Y-branched structure. The main waveguide includes a linear waveguide portion in which a waveguide width is constant and a tapered waveguide portion in which the waveguide width gradually increases between the three-branched structure and the Y-branched structure.
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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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Patent Agency Ranking
公开(公告)号：US10088699B2
公开(公告)日：2018-10-02
申请号：US15689718
申请日：2017-08-29
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Norikazu Miyazaki , Yoichi Hosokawa
Abstract: Modulation electrodes, bias electrodes, and bias electrodes are disposed in this order in a light wave-travelling direction in an optical modulation region modulating light having a wavelength. On the other hand, in an optical modulation region modulating light having a wavelength, the bias electrodes, the bias electrodes, and the modulation electrodes are disposed in this order in the light wave-travelling direction. That is, an order of the modulation electrodes and the bias electrodes in a longitudinal direction of a substrate is changed for each of the wavelengths.
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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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公开(公告)号：US09817293B2
公开(公告)日：2017-11-14
申请号：US15300426
申请日：2015-03-27
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Tokutaka Hara , Norikazu Miyazaki
CPC classification number: G02F1/2255 , G02B6/29352 , G02B6/4215 , G02F2001/212 , G02F2201/58 , H01L31/0232
Abstract: An object is to provide an optical modulator in which a light receiving element is disposed on a substrate configuring the optical modulator and which is capable of suppressing a decrease in the frequency bandwidth of the light receiving element even in a case in which two radiated lights from a combining part in a Mach-Zehnder type optical waveguide are received and monitored at the same time. The optical modulator includes a substrate 1, an optical waveguide including a Mach-Zehnder type optical waveguide formed in the substrate, and a modulation electrode (not illustrated) for modulating light waves that propagate through the optical waveguide, alight receiving element 5 is disposed to bridge over an output waveguide 24 configuring the Mach-Zehnder type optical waveguide so as to receive two radiated lights being radiated from a combining part in the Mach-Zehnder type optical waveguide, and, in the light receiving element, two or more light receiving areas (51 and 52) are formed apart from each other on a substrate of light receiving element 55.
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