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1.发明公开公开(公告)号：US20240255827A1
公开(公告)日：2024-08-01
申请号：US18390725
申请日：2023-12-20
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Yu KATAOKA , Shotaro HIRATA , Yumi MURATA
Abstract: An optical waveguide device including an optical waveguide formed on a substrate is provided, in which a directional coupler is disposed in a part of the optical waveguide, the directional coupler includes one center waveguide and two side waveguides disposed to interpose the center waveguide between the side waveguides, the side waveguides are disposed to come close to the center waveguide from a position where the side waveguides are separated from the center waveguide and then to be separated again from the center waveguide in a traveling direction of a light wave, and the center waveguide and the side waveguides are not in contact with each other.
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公开(公告)号：US20230350235A1
公开(公告)日：2023-11-02
申请号：US18025843
申请日：2022-01-26
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Hideki ICHIMEI , Minoru SHINOZAKI , Yu KATAOKA
IPC: G02F1/01
CPC classification number: G02F1/0113 , G02F1/0102 , G02F1/0121
Abstract: An optical modulator with which electrical connection between a signal electrode and signal wiring of a wiring substrate can be reliably made even in a case where a width of the signal electrode in an action portion of an optical control substrate is narrow is provided. An optical modulator includes an optical control substrate (1) that includes an optical waveguide (OW) including at least a branched waveguide which branches one light wave into two light waves, and that includes a control electrode for applying an electrical field to the branched waveguide, and a wiring substrate provided with a wiring which relays an electrical signal to be applied to the control electrode or with a wiring which terminates the electrical signal, in which the control electrode is provided with a signal electrode (S), the wiring is provided with signal wiring, and in a part (Sc) in which electrical connection is made between the signal electrode (S) and the signal wiring, a clearance (W1) in which the branched waveguide (OW) sandwiches the signal electrode is wider than a clearance (W2) in which the branched waveguide sandwiches the signal electrode in an action portion in which the control electrode applies the electrical field to the branched waveguide.
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公开(公告)号：US20220100010A1
公开(公告)日：2022-03-31
申请号：US17490590
申请日：2021-09-30
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Yu KATAOKA , Shingo TAKANO , Norikazu MIYAZAKI
IPC: G02F1/035
Abstract: 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：US20210302764A1
公开(公告)日：2021-09-30
申请号：US17207389
申请日：2021-03-19
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Shingo TAKANO , Yu KATAOKA , Shoutarou HIRATA
IPC: G02F1/035
Abstract: An optical waveguide device including a rib-type optical waveguide 2 formed of a material having an electro-optic effect, and a reinforcing substrate 1 that supports the rib-type optical waveguide, one end of the rib-type optical waveguide 2 has a tapered portion 20, structures 4 are provided that are disposed apart from the tapered portion so as to sandwich the tapered portion and are disposed on the reinforcing substrate 1, an upper substrate is disposed above the tapered portion and the structures, and an adhesive layer is disposed in a space sandwiched between the upper substrate and the structures.
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公开(公告)号：US20250102840A1
公开(公告)日：2025-03-27
申请号：US18896034
申请日：2024-09-25
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Yu KATAOKA , Kosuke OKAHASHI
IPC: G02F1/035
Abstract: An optical waveguide device includes a substrate, an optical waveguide of a rib type formed on the substrate, and modulation electrodes disposed on the substrate to interpose the optical waveguide of the rib type, in which the modulation electrodes include a plurality of segment electrodes disposed in proximity to the optical waveguide of the rib type and disposed along the optical waveguide of the rib type, and a signal transmission portion electrically connected to the segment electrode and transmitting a modulation signal, a thickness of the signal transmission portion is larger than a thickness of the segment electrode, a buffer layer is disposed between the signal transmission portion and the optical waveguide of the rib type in at least a portion where the signal transmission portion crosses the optical waveguide of the rib type, and no buffer layer is disposed between the substrate and the segment electrode.
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Patent Agency Ranking
6.发明公开公开(公告)号：US20240255783A1
公开(公告)日：2024-08-01
申请号：US18390112
申请日：2023-12-20
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Kosuke OKAHASHI , Yu KATAOKA
CPC classification number: G02F1/035 , G02F1/0327
Abstract: An optical waveguide device includes an optical waveguide formed on a substrate, in which an optical modulator section that modulates a light wave propagating through the optical waveguide is formed in a part of the optical waveguide, in which a first dielectric layer covers the optical waveguide, and a second dielectric layer formed of a different material from the first dielectric layer is disposed on the first dielectric layer in a part of the optical waveguide excluding the optical modulator section.
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7.发明公开公开(公告)号：US20230152539A1
公开(公告)日：2023-05-18
申请号：US17916505
申请日：2020-12-18
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Yuki KUGIMOTO , Norikazu MIYAZAKI , Yu KATAOKA
IPC: G02B6/42
CPC classification number: G02B6/4257 , G02B6/4239
Abstract: To provide an optical waveguide device in which damage to a thin plate, particularly damage to an optical waveguide, is prevented. An optical waveguide device includes: a thin plate 1 that has an electro-optic effect and that has a thickness of equal to or thinner than 10 μm, an optical waveguide 2 being formed on the thin plate; and a reinforcing substrate that supports the thin plate, in which the thin plate 1 has a rectangular shape in a plan view, a dissimilar element layer 3, in which an element different from an element constituting the thin plate is disposed in the thin plate, is formed on at least a portion between an outer periphery of the thin plate and the optical waveguide 2, and a total length over which a cleavage plane of the thin plate traverses a region where the dissimilar element layer is formed, is equal to or longer than 5% of a width of the thin plate in a short side direction.
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8.发明公开公开(公告)号：US20240241396A1
公开(公告)日：2024-07-18
申请号：US18291679
申请日：2021-09-30
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Yu KATAOKA , Kosuke OKAHASHI
IPC: G02F1/035
CPC classification number: G02F1/0356
Abstract: An optical waveguide device in which deterioration of characteristics such as velocity matching, characteristic impedance matching, and an optical loss caused by positional deviation of each electrode layer is suppressed even in a case where a control electrode is formed with a plurality of electrode layers is provided. An optical waveguide device includes a substrate 1 consisting of a material having an electro-optic effect, an optical waveguide 2 formed on the substrate 1, and control electrodes (E1, E2) disposed on the substrate to interpose the optical waveguide between the control electrodes in order to apply an electric field to the optical waveguide 2, in which the control electrodes include at least two or more electrode layers disposed in a sequence of first electrode layers E1 and second electrode layers E2 on the substrate, an insulating layer IL that covers a space between the first electrode layers between which the optical waveguide is interposed and that extends to at least a part of upper surfaces of the first electrode layers is disposed, and at least a part of the second electrode layers E2 is formed on an upper surface of the insulating layer IL.
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9.发明公开公开(公告)号：US20240231002A1
公开(公告)日：2024-07-11
申请号：US18572094
申请日：2021-08-31
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Kosuke OKAHASHI , Yu KATAOKA
IPC: G02B6/30
CPC classification number: G02B6/305
Abstract: Provided is an optical waveguide device including an optical waveguide, and a spot size converter connected to the optical waveguide, in which a propagation loss is further suppressed even in a case where an insulating layer covering the optical waveguide is disposed. An optical waveguide device includes an optical waveguide 2 formed on a substrate 1, and a spot size converter SSC that changes a mode field diameter of a light wave propagating through the optical waveguide in at least one end of the optical waveguide 2, in which an insulating layer IL that covers at least an upper surface of the optical waveguide is provided, and the insulating layer IL is continuously disposed to the spot size converter SSC along the optical waveguide.
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10.发明公开公开(公告)号：US20240159970A1
公开(公告)日：2024-05-16
申请号：US18284498
申请日：2022-03-30
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Takeshi SAKAI , Toshio KATAOKA , Yu KATAOKA
Abstract: An optical waveguide device that enables a location in which an optical loss such as a propagation loss or a coupling loss occurs to be easily specified is provided. An optical waveguide device includes a substrate 1 on which an optical waveguide 2 is formed, and a grating 6 formed in a part of the optical waveguide 2 or a grating 6 connected to a monitoring optical waveguide 5 that merges with or branches from a part of the optical waveguide 2, in which inputting a light wave into the optical waveguide or outputting at least a part of the light wave propagating through the optical waveguide is performed through the grating 6.
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