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公开(公告)号：US09235066B2
公开(公告)日：2016-01-12
申请号：US14037932
申请日：2013-09-26
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Junichiro Ichikawa , Satoshi Oikawa , Hiroshi Murata
CPC classification number: G02F1/0115 , G02F1/225 , G02F1/3558 , H04B10/25137 , H04B10/505
Abstract: An optical modulator that includes a substrate 1 composed of a material having an electro-optical effect, an optical waveguide 2 formed in the substrate, and a modulation electrode 3 for modulating lightwaves propagating through the optical waveguide, in which output light L2 that is output from the optical waveguide is guided with an optical fiber, wavelength dispersion characteristics of the optical fiber transmission line are compensated for by performing polarization reversal 10 of the substrate along the optical waveguide with a predetermined pattern so that the substrate along the optical waveguide has waveform distortion with characteristics that are inverse to the wavelength dispersion characteristics of the optical fiber transmission line, and the compensation for the wavelength dispersion characteristics is adjusted to a predetermined level by disposing an adjustment member made of a dielectric material or a metal material in the vicinity of the modulation electrode.
Abstract translation: 一种光调制器，其包括由具有电光效应的材料构成的基板1，形成在基板中的光波导2和调制电极3，调制电极3用于调制通过光波导传播的光波，输出光L2被输出 从光波导引导光纤，光纤传输线的波长色散特性通过沿着光波导以预定图案执行基板的偏振反转10来补偿，使得沿着光波导的基板具有波形失真 具有与光纤传输线的波长色散特性相反的特性，并且通过将由电介质材料或金属材料制成的调节部件设置在所述光纤传输线的附近，将波长色散特性的补偿调整到预定的水平 调制电极。
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Patent Agency Ranking
公开(公告)号：US09977270B2
公开(公告)日：2018-05-22
申请号：US15515098
申请日：2015-09-30
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Yoshizumi Ishikawa , Youichi Hosokawa , Masayuki Motoya , Satoshi Oikawa
CPC classification number: G02F1/0316 , G02F1/01 , G02F1/035 , G02F1/0356 , G02F1/065 , G02F1/313 , G02F2201/46 , G02F2202/20
Abstract: An optical device is provided, which includes: an optical waveguide provided in a substrate having an electro-optic effect; a signal electrode provided on the substrate and above the optical waveguide; and a peeling prevention film which is provided on at least a part of an outer peripheral portion of the substrate and at a position spaced apart from the signal electrode, and also serves as a ground electrode.
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公开(公告)号：US20220197103A1
公开(公告)日：2022-06-23
申请号：US17599726
申请日：2019-09-26
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Yuu Nakata , Norikazu Miyazaki , Satoshi Oikawa
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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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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5.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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公开(公告)号：US11327347B2
公开(公告)日：2022-05-10
申请号：US17043407
申请日：2019-01-24
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Yu Nakata , Tetsuya Fujino , Satoshi Oikawa
Abstract: Provided is an optical waveguide element capable of connection such as wire bonding, suppressing usage of gold, and suppressing deterioration of a conductor loss. An optical waveguide element includes a substrate 1 having an electro-optic effect, an optical waveguide 2 formed on the substrate, and a control electrode (30, 31) provided on the substrate and controlling a light wave propagating through the optical waveguide. The control electrode is made of a material other than gold, and the gold is disposed on at least a wire bonding portion 4 of the control electrode.
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