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公开(公告)号：US10401658B2
公开(公告)日：2019-09-03
申请号：US15504254
申请日：2015-08-31
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Toshio Kataoka , Kei Kato , Junichiro Ichikawa
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：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：US09946100B2
公开(公告)日：2018-04-17
申请号：US15516196
申请日：2016-03-24
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Teppei Yanagawa , Katsutoshi Kondou , Tetsuya Fujino , Junichiro Ichikawa
CPC classification number: G02F1/0327 , G02B6/42 , G02F1/0316 , G02F1/035 , G02F1/225 , G02F2001/212 , G02F2201/12 , G02F2202/20
Abstract: To effectively prevent the acceleration of the drift phenomenon generated by the application of a high electric field to a substrate through a bias electrode in a waveguide type optical element. A waveguide type optical element includes a substrate (100) having an electro-optic effect, two optical waveguides (104 and 106) disposed on a surface of the substrate, a non-conductive layer (120) which is disposed on the substrate and is made of a material having a lower dielectric constant than the substrate, and a control electrode (150) which is disposed on the non-conductive layer and is intended to generate a refractive index difference between the two optical waveguides by respectively applying electric fields to the two optical waveguides, and the non-conductive layer is constituted of a material which includes silicon oxide, an oxide of indium, and an oxide of titanium and has a ratio between a molar concentration of the titanium oxide and a molar concentration of indium oxide of 1.2 or more, and a voltage generating an electric field of 1 V/μm or more in the substrate is applied to the control electrode.
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公开(公告)号：US20160033848A1
公开(公告)日：2016-02-04
申请号：US14780040
申请日：2014-03-13
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Toshio Kataoka , Katsutoshi Kondou , Junichiro Ichikawa
IPC: G02F1/225
CPC classification number: G02F1/225 , G02F1/0316 , G02F1/2255 , G02F2001/212 , G02F2201/121
Abstract: An aspect of the present invention is an optical modulator including a substrate, a plurality of optical waveguides, and a plurality of modulation electrodes provided on the substrate in order to modulate light propagating through the optical waveguides. The modulation electrodes include signal electrodes, to which modulation signals are supplied, and ground electrodes. The signal electrodes include first and second signal electrodes. The ground electrodes include a first ground electrode provided between the first and second signal electrodes, a second ground electrode provided on the opposite side of the first signal electrode from the first ground electrode adjacent to the first signal electrode, and a third ground electrode provided on the opposite side of the second signal electrode from the first ground electrode adjacent to the second signal electrode. A concave groove is formed in each of the first to third ground electrodes.
Abstract translation: 本发明的一个方面是一种光调制器，其包括基板，多个光波导和设置在基板上的多个调制电极，以便调制通过光波导传播的光。 调制电极包括供给调制信号的信号电极和接地电极。 信号电极包括第一和第二信号电极。 接地电极包括设置在第一和第二信号电极之间的第一接地电极，设置在与第一信号电极相邻的第一接地电极的第一信号电极的相反侧的第二接地电极，以及设置在第一接地电极 第二信号电极的相对于与第二信号电极相邻的第一接地电极的相对侧。 在第一至第三接地电极中的每一个中形成凹槽。
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15.发明公开公开(公告)号：US20230400718A1
公开(公告)日：2023-12-14
申请号：US18250622
申请日：2021-10-22
Applicant: SUMITOMO OSAKA CEMENT CO., LTD. , National Institute of Information and Communications Technology
Inventor： Shingo Takano , Yu Kataoka , Satoshi Oikawa , Junichiro Ichikawa , Yuya Yamaguchi , Atsushi Kanno , Naokatsu Yamamoto , Tetsuya Kawanishi
CPC classification number: G02F1/035 , G02F1/0102 , G02F2201/02 , G02F2201/18
Abstract: An optical waveguide element includes a substrate, an optical waveguide disposed inside the substrate or on the substrate, and an electrode provided along the optical waveguide, working on the optical waveguide to generate a phase change in a light wave propagating through the optical waveguide. The electrode is a traveling-wave electrode. In a modulation section where the light wave is controlled by the electrode, the electrode and the optical waveguide are configured so that the phase change generated in a first modulation section located within a predetermined distance range from a downstream side end portion along a propagation direction of a traveling wave of an electrical signal propagating through the electrode has a sign opposite to a sign of the phase change generated in a second modulation section located within a predetermined distance range from an input end of the electrical signal on an upstream side along the propagation direction.
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Patent Agency Ranking
公开(公告)号：US11347086B2
公开(公告)日：2022-05-31
申请号：US17042839
申请日：2019-02-27
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Katsutoshi Kondo , Kiyotaka Nakano , Eiji Murakami , Junichiro Ichikawa
IPC: G02F1/035
Abstract: To provide an optical element in which an electrode is directly formed on an LN substrate, and a drift phenomenon is suppressed. In an optical element including: a substrate made of lithium niobate crystals; and an electrode disposed on the substrate, the substrate and the electrode are in direct contact with each other, and as a contact metal disposed on a surface of the electrode where the electrode is in contact with the substrate, a metal material whose standard enthalpy of formation per coordinate bond upon oxidation is greater than a standard enthalpy of formation per coordinate bond of niobium pentoxide is used.
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公开(公告)号：US10466513B2
公开(公告)日：2019-11-05
申请号：US15755764
申请日：2016-09-27
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Toshio Kataoka , Junichiro Ichikawa
Abstract: Provided is an optical waveguide device in which destabilization of a DC bias which is applied to an optical waveguide, due to a bias electrode picking up electric noise, is reduced and an operating characteristic is stable.An optical waveguide device includes: a substrate having an electro-optic effect; an optical waveguide formed on the substrate; a modulation electrode for applying an electric field corresponding to a modulation signal to the optical waveguide; and a bias electrode for applying an electric field corresponding to a DC bias to the optical waveguide, in which in order to reduce capture of electric noise by the bias electrode, with respect to at least a part of the bias electrode, a plurality of electrode portions (b11, b12) are formed in at least one (B1) of the pair of electrodes by folding back one electric line.
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公开(公告)号：US10365534B2
公开(公告)日：2019-07-30
申请号：US15171638
申请日：2016-06-02
Applicant: Sumitomo Osaka Cement Co., Ltd.
Inventor： Yuu Nakata , Katsutoshi Kondou , Tetsuya Fujino , Junichiro Ichikawa
Abstract: An optical waveguide device includes a substrate with an electro-optic effect on which an optical waveguide and an electrode for controlling optical waves propagating through the optical waveguide are formed and at least one light source for irradiating ultraviolet light on the substrate.
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公开(公告)号：US10067403B2
公开(公告)日：2018-09-04
申请号：US15504292
申请日：2015-08-31
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Toshio Kataoka , Junichiro Ichikawa
IPC: G02F1/313
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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公开(公告)号：US20180120666A1
公开(公告)日：2018-05-03
申请号：US15509692
申请日：2016-03-09
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Katsutoshi Kondou , Junichiro Ichikawa , Toshio Kataoka
CPC classification number: G02F1/2257 , G02F1/035 , G02F1/225 , G02F1/2255 , G02F2001/212 , H01P3/003
Abstract: In a waveguide-type optical element, broaderband operation becomes possible.The waveguide-type optical element includes optical waveguides (110 and 112) formed on a substrate (100) having an electro-optic effect and a control electrode for controlling an optical wave that is transmitted through the optical waveguide, the control electrode comprises a central electrode (104) and ground electrodes (106 and 108), the central electrode being formed along the optical waveguide, and the ground electrodes being formed so as to put the central electrode therebetween in a surface direction of the substrate at a predetermined distance from the central electrode, and the central electrode or the ground electrodes have multiple pairs of facets, each comprising two facets facing each other, along a transmission direction of high-frequency signals that are transmitted through the central electrode and the ground electrodes.
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