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公开(公告)号：US20220163720A1
公开(公告)日：2022-05-26
申请号：US17599721
申请日：2019-09-26
发明人： Yuki Kugimoto , Norikazu Miyazaki , Yu Kataoka
摘要： In an optical waveguide element, performance deterioration due to recoupling of unnecessary light leaking from an optical waveguide with the optical waveguide is prevented. An optical waveguide element includes an optical substrate on which an optical waveguide is formed, and a support substrate that is bonded to the optical substrate, on a bonded surface of the support substrate bonded to the optical substrate, a recess portion along the optical waveguide on the optical substrate is formed directly under the optical waveguide, a portion of the support substrate from an upper surface of the support substrate to at least a depth of a bottom surface of the recess portion has a refractive index higher than a substrate refractive index of the optical substrate, and the recess portion is filled with a substance having a refractive index lower than the substrate refractive index.
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公开(公告)号：US12025833B2
公开(公告)日：2024-07-02
申请号：US17764950
申请日：2020-09-23
发明人： Yu Kataoka , Norikazu Miyazaki
CPC分类号： G02B6/125 , G02B2006/12097
摘要： Provided is an optical waveguide element that prevents leaked light generated at a forking section from entering a downstream optical waveguide such as another forking section, thereby affording minimal degradation of optical characteristics. The optical waveguide is characterized in that: at least one of two fork waveguides (20a, 20b) forking from a first forking section (20) comprises a second forking section (21, 22); slab waveguides (3c-1 to 3c-3) are formed between the two fork waveguides; and between the first forking section and the second forking section, slits (41, 42) are formed that partition the slab waveguides into a first slab waveguide area (3c-1) close to the first forking section and second slab waveguide areas (3c-2, 3c-3) close to the second forking section(s).
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公开(公告)号：US11977284B2
公开(公告)日：2024-05-07
申请号：US17827022
申请日：2022-05-27
发明人： Masayuki Motoya , Shotaro Hirata , Kosuke Okahashi , Yu Kataoka , Shingo Takano
CPC分类号： G02F1/0356 , G02B6/12004 , G02B6/136 , G02F1/212 , G02F1/2255 , G02B2006/12126 , G02B2006/12142
摘要： There is provided an optical waveguide device including: a substrate; an optical waveguide formed on the substrate; and a working electrode that controls a light wave propagating through the optical waveguide, in which the working electrode includes a first base layer made of a first material, a first conductive layer on the first base layer, a second base layer made of a second material different from the first material, which is on the first conductive layer, and a second conductive layer on the second base layer, and an edge of the second base layer is covered with the second conductive layer, in a cross-section perpendicular to an extending direction of the optical waveguide.
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公开(公告)号：US11656487B2
公开(公告)日：2023-05-23
申请号：US17490590
申请日：2021-09-30
发明人： Yu Kataoka , Shingo Takano , Norikazu Miyazaki
IPC分类号： G02F1/035
CPC分类号： G02F1/0353 , G02F2201/063
摘要： An optical waveguide element includes a substrate and an optical waveguide that is disposed on the substrate. The optical waveguide has an effective refractive index change portion in which an effective refractive index of the optical waveguide related to a fundamental mode A parallel to a plane of polarization of a light wave propagated through the optical waveguide changes according to propagation of the light wave. In the effective refractive index change portion, a cross-sectional shape of the optical waveguide which is perpendicular to a propagation direction of the light wave is set such that the effective refractive index of the optical waveguide related to the fundamental mode A is higher than an effective refractive index of the optical waveguide related to another fundamental mode B perpendicular to the fundamental mode A.
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公开(公告)号：US20230367170A1
公开(公告)日：2023-11-16
申请号：US18246358
申请日：2021-09-28
发明人： Kenta Oishi , Yu Kataoka , Shingo Takano
CPC分类号： G02F1/2255 , G02F1/212
摘要： An optical waveguide element includes: a substrate on which an optical waveguide is formed; and an electrode that is formed on the substrate and controls a light wave propagating through the optical waveguide. The optical waveguide includes a protruding portion extending on the substrate, and the electrode includes a base layer made of Nb, and an upper layer formed on the base layer, the base layer being formed between the substrate and the upper layer. The occurrence of loss in propagating light is effectively suppressed due to the existence of the electrode that controls the propagating light in the optical waveguide element using the protruding optical waveguide
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6.发明公开公开(公告)号：US20230367169A1
公开(公告)日：2023-11-16
申请号：US18246559
申请日：2022-03-04
发明人： Kosuke Okahashi , Yu Kataoka
摘要： An optical waveguide device that can prevent fluctuations in electrical characteristics due to adhesion of foreign matter to electrodes without adversely affecting the degree of freedom in electrode design. The optical waveguide device includes a substrate, an optical waveguide formed on the substrate, an electrode for controlling a light wave propagating through the optical waveguide, and a first insulating layer disposed between two adjacent electrodes among the electrodes, in which the first insulating layer has a height from a surface of the substrate that is higher than heights of the two electrodes.
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公开(公告)号：US20220381977A1
公开(公告)日：2022-12-01
申请号：US17827022
申请日：2022-05-27
发明人： Masayuki Motoya , Shotaro Hirata , Kosuke Okahashi , Yu Kataoka , Shingo Takano
摘要： There is provided an optical waveguide device including: a substrate; an optical waveguide formed on the substrate; and a working electrode that controls a light wave propagating through the optical waveguide, in which the working electrode includes a first base layer made of a first material, a first conductive layer on the first base layer, a second base layer made of a second material different from the first material, which is on the first conductive layer, and a second conductive layer on the second base layer, and an edge of the second base layer is covered with the second conductive layer, in a cross-section perpendicular to an extending direction of the optical waveguide.
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公开(公告)号：US20200292752A1
公开(公告)日：2020-09-17
申请号：US16697219
申请日：2019-11-27
发明人： Yuji YAMANE , Norikazu MIYAZAKI , Yu Kataoka , Hideki ICHIMEI
摘要： 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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9.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
申请人： SUMITOMO OSAKA CEMENT CO., LTD. , National Institute of Information and Communications Technology
发明人： Shingo Takano , Yu Kataoka , Satoshi Oikawa , Junichiro Ichikawa , Yuya Yamaguchi , Atsushi Kanno , Naokatsu Yamamoto , Tetsuya Kawanishi
CPC分类号： G02F1/035 , G02F1/0102 , G02F2201/02 , G02F2201/18
摘要： 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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10.发明申请公开(公告)号：US20220382119A1
公开(公告)日：2022-12-01
申请号：US17827035
申请日：2022-05-27
发明人： Shotaro Hirata , Masayuki Motoya , Kosuke Okahashi , Yu Kataoka , Shingo Takano
IPC分类号： G02F1/225 , G02F1/21 , H04B10/516
摘要： There is provided an optical waveguide device including a substrate, an optical waveguide formed on the substrate, and a working electrode that controls a light wave propagating through the optical waveguide, in which the working electrode includes a first base layer made of a first material, and a first conductive layer on the first base layer, and a conductor pattern including a second base layer made of a second material different from the first material and a second conductive layer on the second base layer is formed in a region other than a path from an input end to an output end of the optical waveguide, in a region on the substrate.
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