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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：US20220390775A1
公开(公告)日：2022-12-08
申请号：US17726249
申请日：2022-04-21
Applicant: Fujitsu Optical Components Limited
Inventor： Shuntaro Makino , Masaharu Doi , YOSHIHIKO YOSHIDA
Abstract: An optical device includes an X-cut substrate, and a first waveguide and a second waveguide each being formed on the substrate and having a folding structure. The optical device includes a first signal electrode to generate a first electric field, and a second signal electrode to generate a second electric field with a reverse phase as compared to the first field. The first waveguide includes a first waveguide on an outward side to which the first field is applied from the first signal electrode, and a first waveguide on a return side to which the second field is applied from the second signal electrode. The second waveguide includes a second waveguide on the outward side to which the first field is applied from the first signal electrode, and a second waveguide on the return side to which the second field is applied from the second signal electrode.
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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：US20200271963A1
公开(公告)日：2020-08-27
申请号：US16799753
申请日：2020-02-24
Applicant: TDK Corporation , FUJITSU OPTICAL COMPONENTS LIMITED
Inventor： Shinji Iwatsuka , Kenji Endou , Hiroki Hara , Toshinori Matsuura , Takashi Kikukawa , Yasuhiro Ohmori , Masaharu Doi , Shintaro Takeuchi , Takehito Tanaka , Yoshinobu Kubota
Abstract: An optical modulator is provided with a substrate, first and second optical waveguides each formed of a ridge-shaped electro-optic material film and disposed so as to be mutually adjacent on the substrate, a buffer layer covering upper surfaces of the first and second optical waveguides, first and second signal electrodes provided above the buffer layer so as to be opposed respectively to the first and second optical waveguides, and a dielectric layer covering at least one of a part of an exposed surface of the first signal electrode and a part of an exposed surface of the second signal electrode, and a part of an upper surface of the buffer layer. Differential signals are applied to the first and second signal electrodes.
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Patent Agency Ranking
公开(公告)号：US10268099B2
公开(公告)日：2019-04-23
申请号：US15679672
申请日：2017-08-17
Applicant: Fujitsu Optical Components Limited
Inventor： Masaharu Doi , Shinji Maruyama , Yoshinobu Kubota
Abstract: An optical modulator connected to a first optical fiber and a second optical fiber arranged in parallel includes an optical-path changing unit that redirects light emerging from a tip of the first optical fiber toward a tip of the second optical fiber and an optical modulation chip that modulates the light redirected by the optical-path changing unit and outputs a light beam obtained by modulating the light to a tip of the second optical fiber.
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公开(公告)号：US20180095339A1
公开(公告)日：2018-04-05
申请号：US15649185
申请日：2017-07-13
Applicant: Fujitsu Optical Components Limited
Inventor： Shinji MARUYAMA , Masaharu Doi
IPC: G02F1/225
CPC classification number: G02F1/2257 , G02F1/225 , G02F1/2255 , G02F2001/212 , G02F2201/02 , G02F2201/12
Abstract: An optical module includes a driver that is provided on a board and generates an electrical signal according to a data signal, and an optical modulator that is connected to an optical fiber and provided on the board and that modulates light emitted from the optical fiber using the electrical signal generated by the driver. The optical module has a cut-out portion that is formed by cutting out part of its outer shape and that accommodates the driver so that the driver overlaps the optical fiber when viewed from a direction perpendicular to the board.
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公开(公告)号：US20170115546A1
公开(公告)日：2017-04-27
申请号：US15229800
申请日：2016-08-05
Applicant: Fujitsu Optical Components Limited
Inventor： Masaharu Doi , Yoshinobu Kubota
IPC: G02F1/225
CPC classification number: G02F1/2257 , G02F1/0121 , G02F1/2255 , G02F2001/212 , G02F2201/12
Abstract: An optical modulator module includes: a substrate in which a plurality of optical modulators are formed; a connector configured to include a plurality of terminals to which a plurality of signals for driving the plurality of optical modulators are input; and a relay board provided between the substrate and the connector. Each of the optical modulators includes an optical waveguide, a modulation electrode formed near the optical waveguide, and a feeder electrode electrically connected to one end of the modulation electrode. The terminals are arranged in parallel to a longitudinal direction of the substrate. Positions of respective ends of the modulation electrodes at which the respective feeder electrodes are electrically connected are the same as positions at which the respective terminals are provided in the longitudinal direction. Wiring patterns are formed on the relay board so as to electrically connect the terminals to the respective feeder electrodes.
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公开(公告)号：US09520948B2
公开(公告)日：2016-12-13
申请号：US14615603
申请日：2015-02-06
Applicant: Fujitsu Optical Components Limited
Inventor： Masaharu Doi , Yoshinobu Kubota , Yoshitada Kawashima , Teruhiro Kubo
IPC: H04B10/50 , G02B6/34 , G02F1/1335
CPC classification number: H04B10/501 , G02B6/34 , G02F2001/133607 , H04B10/506
Abstract: A substrate is a substrate on which a first optical modulator and a second optical modulator are arranged in parallel along a width direction. A first prism moves, to a side opposite to the second optical modulator along the width direction of the substrate, an optical path of the first output light and the second output light that are obtained by light of the first wavelength being modulated by the first optical modulator. A second prism is arranged at a position away from the first prism along a longitudinal direction of the substrate and moves, to a side opposite to the first modulator along the width direction of the substrate, an optical path of the third output light and the fourth output light that are obtained by the light of the second wavelength being modulated by the second optical modulator.
Abstract translation: 衬底是沿着宽度方向平行布置第一光调制器和第二光调制器的衬底。 第一棱镜沿着基板的宽度方向移动到与第二光调制器相对的一侧，通过第一波长的光被第一光学器件调制的第一输出光和第二输出光的光路 调制器。 第二棱镜沿着基板的纵向布置在远离第一棱镜的位置处，沿着基板的宽度方向移动到与第一调制器相反的一侧，第三输出光和第四棱镜的光路 由第二波长的光获得的输出光由第二光调制器调制。
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公开(公告)号：US20150261019A1
公开(公告)日：2015-09-17
申请号：US14630024
申请日：2015-02-24
Applicant: Fujitsu Optical Components Limited
Inventor： Yoshihiko YOSHIDA , Masaharu Doi , Yoshinobu Kubota , Masaki Sugiyama
CPC classification number: G02F1/035 , G02F1/0316 , G02F1/0553 , G02F1/225
Abstract: An optical modulator includes a substrate, an electrode, and an optical waveguide. The substrate includes a flat portion and a protruding portion protruded from the flat portion. The electrode is supported by the protruding portion. The optical waveguide is formed inside the protruding portion and waveguides light to be modulated with a voltage applied to the electrode. The protruding portion contains a part, present on the side of the electrode, of a light distribution region over which the light waveguided by the optical waveguide is distributed. A height of a tip of the protruding portion from the flat portion is smaller than a width of the light distribution region along a protruding direction of the protruding portion. A width of the tip of the protruding portion is smaller than a width of the light distribution region along a direction perpendicular to the protruding direction of the protruding portion.
Abstract translation: 光调制器包括基板，电极和光波导。 基板包括平坦部分和从平坦部分突出的突出部分。 电极由突出部支撑。 光波导形成在突出部分的内部，并且以施加到电极的电压对要调制的光进行波导。 突出部分包含在电极侧存在由光波导波导的光分布在其上的光分布区域的一部分。 突出部的前端部的平坦部的高度比突出部的突出方向的宽度小于配光区域的宽度。 突出部分的尖端的宽度小于沿着与突出部分的突出方向垂直的方向的光分布区域的宽度。
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