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    Resin optical waveguide and composite optical waveguide
    2.
    发明授权
    Resin optical waveguide and composite optical waveguide 有权

    公开(公告)号：US10768372B2

    公开(公告)日：2020-09-08

    申请号：US16292375

    申请日：2019-03-05

    Applicant: AGC Inc.

    Inventor： Seiki Ohara ,  Shotaro Takenobu

    IPC: G02B6/30 ,  G02B6/122 ,  G02B6/28 ,  G02B6/38 ,  G02B6/12

    Abstract: The present invention relates to a resin optical waveguide including a core and a cladding having a refractive index lower than that of the core, in which the resin optical waveguide includes, along a light propagation direction, a coupling part at which at least a part of the core is exposed and an optical waveguide part where the whole circumference of the core is covered with the cladding, and the core has a width Wb at an end part of the coupling part at a side of the optical waveguide part being larger than a width Wa of the core at an end part of the coupling part at a side opposite to the optical waveguide part.

    Composite optical waveguide
    3.
    发明授权
    Composite optical waveguide 有权

    公开(公告)号：US10393966B2

    公开(公告)日：2019-08-27

    申请号：US16131851

    申请日：2018-09-14

    Applicant: AGC INC.

    Inventor： Toshihisa Okada ,  Seiki Ohara ,  Shotaro Takenobu ,  Satoko Noma

    IPC: G02B6/12 ,  G02B6/138 ,  G02B6/26 ,  G02B6/30 ,  G02B6/122

    Abstract: The present invention relates to a composite optical waveguide (1) containing a polymer optical waveguide and a silicon optical waveguide adiabatically coupled to each other, in which the polymer optical waveguide and the silicon optical waveguide are coupled to each other by an adhesive layer in an adiabatic-coupling portion where a core of the polymer optical waveguide and a core of the silicon optical waveguide are disposed to face each other, the adhesive layer is formed by using a photocurable adhesive having a glass transition point Tg being 125° C. or higher after curing, and the adiabatic-coupling portion includes a region in which a spacing t between the core of the polymer optical waveguide and the silicon optical waveguide is 1.5 μm or less.

    Resin optical waveguide
    7.
    发明授权
    Resin optical waveguide 有权

    公开(公告)号：US10473855B2

    公开(公告)日：2019-11-12

    申请号：US16203983

    申请日：2018-11-29

    Applicant: AGC INC.

    Inventor： Seiki Ohara ,  Kenta Kobayashi ,  Shotaro Takenobu

    IPC: G02B6/122 ,  G02B6/12

    Abstract: Provided is a resin optical waveguide containing a core, under cladding and over cladding, in which the resin optical waveguide has portions having a core width varying along a light propagation direction, the maximum core width is 4 to 10 μm, and the minimum core width of 1 μm or more and less than 4 μm, when the length of a portion S at which the core width is 1 μm or more and less than 4 μm is LS and the length of a portion at which the core width is 4 to 10 μm is LL, the proportion of LS to the total length is 0.1 to 40%, and the portion S contains neither a certain bubble defect nor a certain defect inside the core and in a vicinity of a core-cladding interface.

    Polymer optical waveguide and composite optical waveguide
    8.
    发明授权
    Polymer optical waveguide and composite optical waveguide 有权

    公开(公告)号：US11886006B2

    公开(公告)日：2024-01-30

    申请号：US17453906

    申请日：2021-11-08

    Applicant: AGC Inc.

    Inventor： Naoya Wada ,  Shotaro Takenobu ,  Kenta Kobayashi ,  Seiki Ohara

    IPC: G02B6/122 ,  G02B6/02

    CPC classification number: G02B6/1221 ,  G02B6/02038

    Abstract: The present invention provides a polymer optical waveguide having a core, an under cladding and an over cladding, in which: the polymer optical waveguide has a first section on one end side in the light propagation direction where no portion of the over cladding exists and the core and the under cladding are exposed, and a second section on the other end side in the light propagation direction where the core is covered with the under cladding and the over cladding; and a relative refractive index difference among the core, the under cladding and the over cladding, a core width and core height in an end surface at the one end side of the first section, and a core width and core height in an end surface at the other end side of the second section satisfy predetermined relationships.

    Glass ceramic and chemically strengthened glass
    9.
    发明授权
    Glass ceramic and chemically strengthened glass 有权

    公开(公告)号：US11505491B2

    公开(公告)日：2022-11-22

    申请号：US17521910

    申请日：2021-11-09

    Applicant: AGC Inc.

    Inventor： Seiki Ohara ,  Qing Li ,  Shusaku Akiba

    IPC: C03C3/097 ,  C03C21/00

    Abstract: The present invention relates to a glass ceramic including crystals, and including, in mol % in terms of oxides: 65-75% of SiO2; 3-6% of Al2O3; 15-25% of Li2O; 0.2-4% of P2O5; 0.5-5% of ZrO2; and 0.01-0.5% of HfO2, in which the crystals include one or more kinds of crystals selected from the group consisting of β-spodumene crystals, petalite crystals, and eucryptite crystals.

    Resin optical waveguide
    10.
    发明授权
    Resin optical waveguide 有权

    公开(公告)号：US10222554B2

    公开(公告)日：2019-03-05

    申请号：US15884883

    申请日：2018-01-31

    Applicant: AGC Inc.

    Inventor： Seiki Ohara ,  Shotaro Takenobu

    IPC: G02B6/30 ,  G02B6/12 ,  G02B6/122 ,  G02B6/26 ,  G02B6/13

    Abstract: A resin optical waveguide containing a core, an under cladding and an over cladding having refractive indices lower than that of the core, in which the resin optical waveguide has, at one end side thereof, a core-exposed section at which the over cladding is not present and the core is exposed and, of the under cladding, a portion corresponding to the core-exposed section has a core-neighboring region that satisfies the following (1) and (2):(1) the core-neighboring region is a region whose distance from the core is within x, and x is 5 μm or more and 20 μm or less; and(2) the core-neighboring region has a refractive index distribution that the refractive index at a side of an interface with the core is high and the refractive index at a far side from the interface with the core is low.

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