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公开(公告)号：US11892743B2
公开(公告)日：2024-02-06
申请号：US17599726
申请日：2019-09-26
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Yuu Nakata , Norikazu Miyazaki , Satoshi Oikawa
CPC classification number: G02F1/2252 , G02B6/125 , G02B6/2935 , G02F1/212
Abstract: An optical modulation element that can be housed in the same housing together with an electronic circuit is implemented without deteriorating the high-frequency characteristics and the optical modulation characteristics and without increasing a size of the housing. An optical modulation element includes two Mach-Zehnder type optical waveguides that are provided on a substrate, a branched waveguide that branches input light which is input from an outside of the substrate into two light beams, two connection waveguides that respectively guide the light beams branched by the branched waveguide to the two Mach-Zehnder type optical waveguides, and electrodes that respectively control optical waves propagating in optical waveguides configuring the two Mach-Zehnder type optical waveguides, in which respective parallel waveguides of the two Mach-Zehnder type optical waveguides are configured to extend along one side of the substrate, the branched waveguide is disposed such that light is input from a direction of the one side, and the branched waveguide is formed to be line-symmetrical with respect to a propagation direction of the light input to the branched waveguide and to output the two branched light beams in a direction different from the propagation direction.
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22.发明公开公开(公告)号：US20230367147A1
公开(公告)日：2023-11-16
申请号：US18245977
申请日：2021-09-24
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Norikazu Miyazaki , Toru Sugamata
IPC: G02F1/035
CPC classification number: G02F1/0356 , G02F2201/063 , G02F2202/20
Abstract: The optical absorption loss of the optical waveguide and the signal propagation loss of the high-frequency signal electrode are both reduced at a plurality of intersections between the convex optical waveguide and the high-frequency signal electrode, thereby achieving good operating characteristics. An optical waveguide device includes a substrate on which optical waveguides are formed, and an electrode that is formed on the substrate and has intersections crossing over the optical waveguides, in which the optical waveguides are configured by protruding portions extending on the substrate, and an intermediate layer made of a resin is provided at the adjacent intersections along the electrode to fill spaces between the protruding portions along the electrode and covers top of the protruding portions.
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公开(公告)号：US11215754B2
公开(公告)日：2022-01-04
申请号：US16697219
申请日：2019-11-27
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Yuji Yamane , Norikazu Miyazaki , Yu Kataoka , Hideki Ichimei
Abstract: An optical waveguide element includes an optical waveguide which is formed on one surface of a substrate, an incidence part for light to be incident on the optical waveguide or an emission part for emitting light from the optical waveguide which is disposed in an end portion of the substrate, and a dielectric film which is formed on the optical waveguide of at least one of the incidence part and the emission part, and the vicinity thereof. Regarding the dielectric film, dielectric films including a dielectric film formed of a first material having an index of refraction higher than an index of refraction of the substrate and a dielectric film formed of a second material having an index of refraction lower than the index of refraction of the substrate are alternately laminated.
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公开(公告)号：US11099324B2
公开(公告)日：2021-08-24
申请号：US16667888
申请日：2019-10-29
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Yu Kataoka , Norikazu Miyazaki
IPC: G02B6/125
Abstract: In the optical waveguide device including an unnecessary-light waveguide for guiding unnecessary light emitted from a main waveguide, an emission waveguide connected to the unnecessary-light waveguide to emit the unnecessary light propagating through the unnecessary-light waveguide to the outside of the substrate is formed; an effective refractive index of the emission waveguide is set to be higher than an effective refractive index of the unnecessary-light waveguide; in a connection portion between the unnecessary-light waveguide and the emission waveguide, a centerline of the emission waveguide is inclined in a direction away from the main waveguide with respect to a centerline of the unnecessary-light waveguide; furthermore, in the connection portion, a position of the centerline of the emission waveguide is disposed to be shifted to a position further away from the main waveguide with respect to a position of the centerline of the unnecessary-light waveguide.
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公开(公告)号：US20210157176A1
公开(公告)日：2021-05-27
申请号：US17256396
申请日：2019-06-28
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Norikazu Miyazaki , Toru Sugamata
Abstract: To suppress characteristic fluctuations and or the degradation of long-term reliability attributed to the disposition of a heat-generating electronic component close to an optical modulator. An optical modulation element including an optical waveguide and a housing are provided, the housing has a bottom surface wall having a quadrilateral shape in a plan view, a first short side wall and a second short side wall that are connected to two opposite edges of the bottom surface wall, and a first long side wall and a second long side wall that are longer than the first short side wall and the second short side wall and are connected to two other opposite edges of the bottom surface wall, a light input terminal portion that holds an input optical fiber and a light output terminal portion that holds an output optical fiber are both fixed to the first short side wall, and the housing has a high-thermal resistance portion having a higher thermal resistance than a housing portion other than an optical input and output region in at least a part of the optical input and output region that is a range from an outer surface of the first short side wall to the first end portion of the optical modulation element that faces the first short side wall.
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Patent Agency Ranking
公开(公告)号：US20210149268A1
公开(公告)日：2021-05-20
申请号：US17256394
申请日：2019-06-28
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Norikazu Miyazaki , Toru Sugamata
Abstract: An optical modulator has an optical modulation element including optical waveguides and a housing that accommodates the optical modulation element. The housing has a bottom surface wall having a quadrilateral shape in a plan view, first and second long side walls that are connected to two opposite edges of the bottom surface wall, and first and second short side walls, shorter than the long side walls, and connected to two other opposite edges of the bottom surface wall. The optical modulation element is accommodated in a space surrounded by the bottom surface wall and the side walls. The second long side wall has a wall thickness that is equal to or larger than that of the first long side wall, and at least one of the first and second short side walls has a wall thickness that is thinner than that of the first long side wall.
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公开(公告)号：US10591670B2
公开(公告)日：2020-03-17
申请号：US16360031
申请日：2019-03-21
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Yu Kataoka , Norikazu Miyazaki
Abstract: In an optical waveguide element, an optical waveguide is formed on a substrate, the optical waveguide has a main waveguide that propagates signal light, a waveguide for unnecessary light that guides unnecessary light released from the main waveguide, and a waveguide for collecting unnecessary light to which the unnecessary light emitted from the waveguide for unnecessary light is introduced, the waveguide for unnecessary light is connected to the waveguide for collecting unnecessary light via a waveguide for connection, and a width of the waveguide for connection, which is a width in a direction that perpendicularly intersects a propagation direction of the unnecessary light, at a portion connected to the waveguide for collecting unnecessary light is set to be wider than a width at a portion connected to the waveguide for unnecessary light with the waveguide for connection.
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公开(公告)号：US10527874B2
公开(公告)日：2020-01-07
申请号：US16090276
申请日：2017-04-03
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Norikazu Miyazaki , Kei Katou
Abstract: An optical modulator is provided and includes a substrate that has an electro-optic effect, an optical waveguide that is formed on the substrate, a plurality of control electrodes that control a light wave propagated through the optical waveguide, and a plurality of light receiving elements that detect a light wave propagated through the optical waveguide. The optical modulator has two or more independent optical waveguide modulation portions. The light receiving elements are respectively provided in an upper part of the substrate with respect to the independent optical waveguide modulation portions. A wiring substrate is located above the substrate. A plurality of electric wirings are located on the wiring substrate. The plurality of electric wirings are disposed to extend in the vicinity of one side of the wiring substrate, are electrically connected to the light receiving elements, and output a signal detected by the light receiving elements to the outside.
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公开(公告)号：US20180284558A1
公开(公告)日：2018-10-04
申请号：US15893849
申请日：2018-02-12
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Norikazu Miyazaki , Yoichi Hosokawa , Toru Sugamata
CPC classification number: G02F1/2257 , G02B6/12004 , G02B6/42 , G02B2006/1204 , G02F1/0316
Abstract: A waveguide optical element which includes a plurality of optical waveguides provided on a substrate having an electro-optic effect includes: a plurality of signal electrodes controlling light waves propagating through the optical waveguides; and a plurality of ground electrodes provided so as to interpose each of the signal electrodes therebetween, in which at least one of the ground electrodes includes a first layer and a second layer formed on the first layer, the second layer is formed such that a distance between the second layer and the signal electrode adjacent to the second layer is larger than a distance between the first layer and said signal electrode adjacent to said second layer, and a thickness of the ground electrode which includes the first layer and the second layer is 25 μm or more.
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公开(公告)号：US09523872B2
公开(公告)日：2016-12-20
申请号：US15082003
申请日：2016-03-28
Applicant: Sumitomo Osaka Cement Co., Ltd.
Inventor： Toshio Kataoka , Norikazu Miyazaki , Youichi Hosokawa
CPC classification number: G02F1/0316 , G02B6/00 , G02B6/12 , G02F1/025 , G02F1/0356 , G02F1/2255 , G02F2201/121
Abstract: [Task] Reduction in crosstalk between signal electrodes.[Means for Resolution] An optical modulator 1 includes a relay substrate 3 including a substrate portion 30, and signal electrodes 31 and 32, and a ground electrode 33 which are provided on the substrate portion 30, and an optical waveguide substrate 4 including an electrode-optical substrate 40, signal electrodes 431 and 432, and an optical waveguide 42 which are provided on the electro-optical substrate 40. Modulation signals are input from ends 31a and 32a on one side of the signal electrodes 31 and 32, the other end 31b of the signal electrode 31 is electrically connected to the signal electrode 431, the other end 32b of the signal electrode 32 is electrically connected to the signal electrode 432, an optical wave, which propagates through the optical waveguide 42, is modulated by the modulation signals which propagate through the signal electrodes 431 and 432, the ground electrode 33 is provided between the signal electrodes 31 and 32, and the relay substrate 3 includes a first adjacent portion 44 at which the signal electrodes 31 and 32 are adjacent to each other, and a through-hole 30g that is provided in the ground electrode 33 at the first adjacent portion 44.
Abstract translation: [解决方法]光调制器1包括：设置在基板部30上的基板部30，信号电极31,32以及接地电极33的中继基板3和具有电极的光波导基板4 - 光学基板40，信号电极431和432以及设置在电光基板40上的光波导42。调制信号从信号电极31,32的一侧的端部31a和32a输入，另一端 信号电极31的31b与信号电极431电连接，信号电极32的另一端32b与信号电极432电连接，通过光波导路42传播的光波被调制 通过信号电极431和432传播的信号，接地电极33设置在信号电极31和32之间，继电器基板3包括第一个广告 信号电极31和32彼此相邻的相邻部分44，以及设置在第一相邻部分44处的接地电极33中的通孔30g。
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