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公开(公告)号：US12153294B2
公开(公告)日：2024-11-26
申请号：US17947657
申请日：2022-09-19
Applicant: FUJITSU OPTICAL COMPONENTS LIMITED
Inventor： Shuntaro Makino , Teruo Kurahashi , Yoshinobu Kubota , Yoshihiko Yoshida , Nobuaki Mitamura , Takehito Tanaka
IPC: G02F1/035
Abstract: An optical device includes a substrate, a first cladding layer that is laminated on one surface of the substrate, and a first optical waveguide that is formed in the first cladding layer at a side opposite to the substrate in the first cladding layer. The optical device further includes an electro-optic crystal layer that is laminated on a surface of the first cladding layer at a side opposite to the substrate, and a second optical waveguide that is formed of the electro-optic crystal layer on a surface of the electro-optic crystal layer at a side opposite to the first cladding layer. The optical device further includes a second cladding layer that is laminated on a surface of the electro-optic crystal layer at a side opposite to the first cladding layer.
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公开(公告)号：US12044910B2
公开(公告)日：2024-07-23
申请号：US17725944
申请日：2022-04-21
Applicant: FUJITSU OPTICAL COMPONENTS LIMITED
Inventor： Shuntaro Makino , Yoshinobu Kubota , Yasuhiro Ohmori , Masaharu Doi , Masaki Sugiyama , Shintaro Takeuchi , Yoshihiko Yoshida , Shinji Maruyama , Teruo Kurahashi
CPC classification number: G02F1/0353 , G02F1/212 , G02F1/225 , G02F2202/20 , H04J14/02
Abstract: An optical device includes a thin film Lithium Niobate (LN) layer, a first optical waveguide, and a second optical waveguide. The thin film LN layer is an X-cut or a Y-cut LN layer. The first optical waveguide is an optical waveguide that is formed on the thin film LN layer along a direction that is substantially perpendicular to a Z direction of a crystal axis of the thin film LN layer. The second optical waveguide is an optical waveguide that is routed and connected to the first optical waveguide. At least a part of a core of the first optical waveguide is made thicker than a core of the second optical waveguide.
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Patent Agency Ranking
公开(公告)号：US11624965B2
公开(公告)日：2023-04-11
申请号：US17350627
申请日：2021-06-17
Applicant: Fujitsu Optical Components Limited
Inventor： Shuntaro Makino , Yoshinobu Kubota , Yasuhiro Ohmori , Masaharu Doi , Teruo Kurahashi
Abstract: An optical waveguide device includes an intermediate layer, a thin-film LN layer including X-cut lithium niobate, and a buffer layer stacked on a substrate; an optical waveguide formed in the thin-film LN layer; and an electrode for driving. The intermediate layer is formed by an upper first intermediate layer and a lower second intermediate layer, the second intermediate layer having a permittivity that is smaller than a permittivity of the first intermediate layer.
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公开(公告)号：US20210325760A1
公开(公告)日：2021-10-21
申请号：US17165562
申请日：2021-02-02
Applicant: Fujitsu Optical Components Limited
Inventor： Shuntaro Makino , Yoshinobu Kubota , Yasuhiro Ohmori , Masaharu Doi , Teruo Kurahashi , Shintaro Takeuchi
Abstract: An optical waveguide device includes a substrate on which an intermediate layer, a thin-film LN layer of lithium niobate, and a buffer layer are stacked; an optical waveguide formed in the thin-film LN layer; and a plurality of electrodes near the optical waveguide. The intermediate layer and the buffer layer contain a same material of a metal element of any one of group 3 of group 18 of a periodic table of elements.
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公开(公告)号：US11936428B2
公开(公告)日：2024-03-19
申请号：US17946669
申请日：2022-09-16
Applicant: Fujitsu Optical Components Limited
Inventor： Shuntaro Makino , Teruo Kurahashi
CPC classification number: H04B10/25
Abstract: An optical device includes an electro-optic crystal layer, a first optical waveguide formed in the electro-optic crystal layer, and an electrode that applies an electric signal to the first optical waveguide. Further, the optical device includes a second optical waveguide in an amorphous state formed in the electro-optic crystal layer and connected to the first optical waveguide.
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公开(公告)号：US11693290B2
公开(公告)日：2023-07-04
申请号：US17165562
申请日：2021-02-02
Applicant: Fujitsu Optical Components Limited
Inventor： Shuntaro Makino , Yoshinobu Kubota , Yasuhiro Ohmori , Masaharu Doi , Teruo Kurahashi , Shintaro Takeuchi
CPC classification number: G02F1/225 , G02F1/035 , G02F1/0316 , G02F2201/07 , G02F2201/12 , G02F2202/20
Abstract: An optical waveguide device includes a substrate on which an intermediate layer, a thin-film LN layer of lithium niobate, and a buffer layer are stacked; an optical waveguide formed in the thin-film LN layer; and a plurality of electrodes near the optical waveguide. The intermediate layer and the buffer layer contain a same material of a metal element of any one of group 3 of group 18 of a periodic table of elements.
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公开(公告)号：US20230141163A1
公开(公告)日：2023-05-11
申请号：US17946669
申请日：2022-09-16
Applicant: Fujitsu Optical Components Limited
Inventor： Shuntaro Makino , Teruo Kurahashi
IPC: H04B10/25
CPC classification number: H04B10/25
Abstract: An optical device includes an electro-optic crystal layer, a first optical waveguide formed in the electro-optic crystal layer, and an electrode that applies an electric signal to the first optical waveguide. Further, the optical device includes a second optical waveguide in an amorphous state formed in the electro-optic crystal layer and connected to the first optical waveguide.
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