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公开(公告)号：US20250062831A1
公开(公告)日：2025-02-20
申请号：US18767478
申请日：2024-07-09
Applicant: FUJITSU OPTICAL COMPONENTS LIMITED
Inventor： Masaki SUGIYAMA
Abstract: An optical device includes a first edge coupler that is connected to a polarization multiplexer-demultiplexer and that makes contact with an end face and a second edge coupler that is connected to an optical hybrid circuit and that makes contact with the end face. The optical device includes a first taper portion that directs light from the end face and that is contained in the first edge coupler and a second taper portion that directs light from the end face and that is contained in the second edge coupler. The second taper portion has a structure in which a taper angle of the second taper portion with respect to the end face is smaller than a taper angle of the first taper portion with respect to the end face.
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公开(公告)号：US20240230992A9
公开(公告)日：2024-07-11
申请号：US18235930
申请日：2023-08-21
Applicant: FUJITSU OPTICAL COMPONENTS LIMITED
Inventor： Masaki SUGIYAMA
IPC: G02B6/122
CPC classification number: G02B6/1228
Abstract: An optical device includes a first layer, a second layer, two first waveguides arranged in a side by side manner in the first layer; two second waveguides arranged in a side by side manner in the second layer, and a third waveguide arranged between the first waveguides and between the second waveguides. The first waveguide includes a first tapered waveguide and a second tapered waveguide. The third waveguide includes a third tapered waveguide that is disposed side by side with the second tapered waveguides. The first tapered waveguide has a width that is gradually narrower as the first tapered waveguide is away from a joining point with the second tapered waveguide. The second tapered waveguide has a width that is gradually narrower as the second tapered waveguide is away from a joining point with the first tapered waveguide. The third tapered waveguide has a width that is gradually wider.
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公开(公告)号：US20240077673A1
公开(公告)日：2024-03-07
申请号：US18227776
申请日：2023-07-28
Applicant: FUJITSU OPTICAL COMPONENTS LIMITED
Inventor： Masaki SUGIYAMA
CPC classification number: G02B6/125 , G01M11/30 , G02B2006/12147
Abstract: An optical chip includes a chip area located on a wafer, and an optical circuit arranged in the chip area. The optical chip includes a first waveguide that is connected to a first operational fiber, a second waveguide, and a first coupler that includes a first port that is connected to the first waveguide and the second waveguide and a second port that is connected to the optical circuit. Furthermore, the optical chip includes a first trench that is formed on a surface of the chip area, that is connected to the second waveguide, and in which a first test purpose fiber is inserted.
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公开(公告)号：US20230004028A1
公开(公告)日：2023-01-05
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
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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公开(公告)号：US20210278597A1
公开(公告)日：2021-09-09
申请号：US17141288
申请日：2021-01-05
Applicant: Fujitsu Optical Components Limited
Inventor： Masaki SUGIYAMA
Abstract: An optical device includes: a substrate; an optical waveguide that forms a Mach-Zehnder interferometer; a signal electrode; and a ground electrode. The optical waveguide is placed between the signal electrode and the ground electrode.
An electric field is generated in a direction along a surface of the substrate when a voltage is applied between the signal electrode and the ground electrode. The optical waveguide includes a first waveguide through which input light propagates, a curved waveguide which is optically coupled to the first waveguide, and a second waveguide which is optically coupled to the curved waveguide. The signal electrode includes first and second electrodes that are respectively placed near the first and second waveguides. An electric signal is supplied to the first electrode, and an inverted electric signal is supplied to the second electrode.
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公开(公告)号：US20170357054A1
公开(公告)日：2017-12-14
申请号：US15605192
申请日：2017-05-25
Applicant: Fujitsu Optical Components Limited
Inventor： Masaki SUGIYAMA
CPC classification number: G02B6/2861 , G02B6/125 , G02B6/29352 , G02B6/29398 , G02B2006/12061 , G02B2006/12097
Abstract: A disclosed optical device includes a first waveguide disposed between a branching portion and a multiplexing portion on a semiconductor substrate, and a second waveguide disposed between the branching portion and the multiplexing portion, the second waveguide being longer than the first waveguide. In the optical device, an optical confinement effect of the first waveguide is greater than an optical confinement effect of the second waveguide, the first waveguide has a curvature with a first curvature radius (Rs), the second waveguide has a curvature with a second curvature radius (Rl), and the first curvature radius is smaller than the second curvature radius.
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公开(公告)号：US20160191169A1
公开(公告)日：2016-06-30
申请号：US15063588
申请日：2016-03-08
Applicant: FUJITSU OPTICAL COMPONENTS LIMITED
Inventor： Masaki SUGIYAMA
IPC: H04B10/532 , H04J14/06 , G02F1/225
CPC classification number: H04B10/532 , G02F1/2255 , G02F2001/212 , G02F2201/126 , H04J14/06
Abstract: An optical modulator includes a package that accommodates therein a first substrate and a second substrate different from the first substrate, and outside the package, a flexible circuit board. The first substrate has plural optical modulating units disposed thereon in parallel and each including a Mach-Zehnder optical waveguide. Plural first signal line paths corresponding to the optical modulating units are disposed on the second substrate. Plural second signal line paths corresponding to the optical modulating units are disposed on the flexible circuit board. Electrical lengths of the second signal line paths are different from one another. Electrical lengths of signal paths that span from input ends of the second signal line paths corresponding to the optical modulating units to base points on signal electrodes, via the first signal line paths, are equal to one another.
Abstract translation: 一种光学调制器包括：容纳其中的第一基板和不同于第一基板的第二基板以及封装外部的柔性电路板的封装。 第一基板平行配置有多个光调制单元，每一个包括马赫 - 策德尔光波导。 对应于光调制单元的多个第一信号线路径设置在第二基板上。 对应于光调制单元的多个第二信号线路径设置在柔性电路板上。 第二信号线路径的电长度彼此不同。 经由第一信号线路径跨越从与光调制单元对应的第二信号线路径到信号电极上的基点的信号路径的电长度彼此相等。
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公开(公告)号：US20250044521A1
公开(公告)日：2025-02-06
申请号：US18746490
申请日：2024-06-18
Applicant: FUJITSU OPTICAL COMPONENTS LIMITED
Inventor： Masaki SUGIYAMA
IPC: G02B6/35
Abstract: An optical device is an optical device that is formed on a wafer. The optical device includes an optical circuit, a grating coupler, and an optical switch that includes a first port that is connected to the grating coupler, a second port that is connected to the optical circuit, and a third port that is connected to a loop mirror by way of a phase shifter.
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公开(公告)号：US20250012989A1
公开(公告)日：2025-01-09
申请号：US18662260
申请日：2024-05-13
Applicant: FUJITSU OPTICAL COMPONENTS LIMITED
Inventor： Masaki SUGIYAMA
Abstract: An optical integrated device includes a first chip including an optical circuit, and a second chip including an optical waveguide including a material with an electro-optic effect larger than the electro-optic effect of a material of the first chip. In the optical integrated device, the first chip is mounted in a trench formed on the second chip, and the first chip is optically coupled to the second chip by butt coupling.
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公开(公告)号：US20240295708A1
公开(公告)日：2024-09-05
申请号：US18425106
申请日：2024-01-29
Applicant: FUJITSU OPTICAL COMPONENTS LIMITED
Inventor： Masaki SUGIYAMA
IPC: G02B6/42
CPC classification number: G02B6/4239 , G02B6/4206
Abstract: An optical device includes a substrate, a trench that is formed on the substrate, an optical waveguide that is formed on the substrate and that is connected to a first side surface of the trench, and a lens that is arranged on the first side surface included in the trench and that is connected to the optical waveguide. Furthermore, the optical device includes an optical fiber that is secured, by an adhesive, to a chip end surface that is located adjacent to a second side surface that is located opposite the first side surface included in the trench.
