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公开(公告)号：US20170212402A1
公开(公告)日：2017-07-27
申请号：US15384854
申请日：2016-12-20
Applicant: Fujitsu Optical Components Limited
Inventor： Akira ISHII , Shinji MARUYAMA , Yuki SAKURAI , Masaharu DOI , Osamu OYAMA , Masami KAMIOKA
CPC classification number: G02F1/2255 , G02B6/126 , G02F2201/12 , H01L2224/48091 , H01L2224/48464 , H01R9/0515 , H01R12/515 , H01R12/592 , H01R12/7076 , H01R12/79 , H01R24/38 , H01R24/50 , H01L2924/00014
Abstract: An optical module includes a driver that generates an electric signal and an optical modulator that has a notch in which at least a portion of the driver is accommodated and performs optical modulation using an electric signal generated by the driver. The optical module also includes a first connector electrically connected to the driver in the notch of the optical modulator. The optical module further includes a second connector provided on a surface of the notch of the optical modulator, the surface being opposed to the first connector. The second connector is electrically connected to the optical modulator. Furthermore, the optical module includes a coaxial pin that is connected to the first connector and the second connector and transmits the electric signal generated by the driver to the optical modulator.
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公开(公告)号：US20200310216A1
公开(公告)日：2020-10-01
申请号：US16832784
申请日：2020-03-27
Applicant: TDK Corporation , FUJITSU OPTICAL COMPONENTS LIMITED
Inventor： Shinji IWATSUKA , Kenji SASAKI , Hiroki HARA , Yasuhiro OHMORI , Masaharu DOI , Shintaro TAKEUCHI , Yoshihiko YOSHIDA , Yoshinobu KUBOTA
Abstract: An electro-optic device is provided with a substrate, an optical waveguide formed of a lithium niobate film with a ridge shape on the substrate, and an electrode that applies an electric field to the optical waveguide. The optical waveguide includes a first waveguide section provided at least in an electric field application region applied with the electric field and having a thickness of 1 μm or larger and a second waveguide section provided in a region other than the electric field application region and having a thickness of 0.3 μm or larger and less than 1 μm.
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公开(公告)号：US20200272020A1
公开(公告)日：2020-08-27
申请号：US16799763
申请日：2020-02-24
Applicant: FUJITSU OPTICAL COMPONENTS LIMITED , TDK Corporation
Inventor： Yasuhiro OHMORI , Masaharu DOI , Shintaro TAKEUCHI , Takehito TANAKA , Yoshinobu KUBOTA , Shinji IWATSUKA , Kenji ENDOU , Hiroki HARA , Toshinori MATSUURA , Takashi KIKUKAWA
Abstract: An optical modulator is provided with a ridge-shaped optical waveguide formed of a dielectric thin film having electro-optic effect, a buffer layer covering the optical waveguide, a signal electrode formed on the buffer layer so as to be opposed to the optical waveguide through the buffer layer; a ground electrode formed on the buffer layer together with the signal electrode, and a dielectric film having a higher dielectric constant than air and covering at least a part of exposed surfaces of the signal electrode and ground electrode and exposed surfaces of the buffer layer.
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公开(公告)号：US20180031945A1
公开(公告)日：2018-02-01
申请号：US15650222
申请日：2017-07-14
Applicant: Fujitsu Optical Components Limited
Inventor： Yasuhiro OHMORI , Yoshinobu KUBOTA , Masaharu DOI , Masaki SUGIYAMA
CPC classification number: G02F1/2255 , G02F1/0027 , G02F1/0123 , G02F1/2257 , G02F2201/07 , G02F2203/21 , H04B10/50572
Abstract: An optical modulator includes an optical modulator chip configured to optically modulate an optical signal using an electrical signal input thereto; and a relay substrate configured to relay and couple the electrical signal to the optical modulator chip. The optical modulator chip includes a signal electrode and a ground electrode for the electrical signal, formed along a waveguide for the optical signal. One end of the optical modulator chip is arranged to face the relay substrate. An electrode connection portion coupling the electrical signal to the relay substrate by wire is provided at the one end. A distance between a tip of one end of the signal electrode in the electrode connection portion and the end of the optical modulator chip is less than a distance between a tip of an end of the ground electrode in the electrode connection portion and the end of the optical modulator chip.
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公开(公告)号：US20180120670A1
公开(公告)日：2018-05-03
申请号：US15679672
申请日：2017-08-17
Applicant: Fujitsu Optical Components Limited
Inventor： Masaharu DOI , Shinji MARUYAMA , Yoshinobu KUBOTA
CPC classification number: G02F1/3131 , G02B6/381 , G02F1/3521 , G06F13/4282 , H04B10/505 , H04B10/556 , H04B10/676
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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Patent Agency Ranking
公开(公告)号：US20170045688A1
公开(公告)日：2017-02-16
申请号：US15221047
申请日：2016-07-27
Applicant: Fujitsu Optical Components Limited
Inventor： Masaharu DOI
CPC classification number: G02B6/2773 , G02B6/2706 , G02B6/2766 , G02B6/34 , G02F1/225 , G02F2001/212 , G02F2201/34
Abstract: An optical modulator includes a modulating unit, an optical fiber, and a combining unit. The modulating unit outputs first and second optical beams with the electric signal superimposed thereon in a first direction. The optical fiber is placed along a second direction perpendicular to the first direction. The combining unit combines the first and second optical beams output by the modulating unit and outputs an optical beam obtained by the first and second optical beams being combined to the optical fiber. The combining unit includes a polarized light rotating element and a polarized light combining element. The polarized light rotating element rotates the polarization direction of the first optical beam. The polarized light combining element reflects the first optical beam of which the polarization direction has been rotated and the second optical beam in the second direction, and combines the first and second optical beams reflected in the second direction.
Abstract translation: 光调制器包括调制单元，光纤和组合单元。 调制单元在第一方向上输出叠加有电信号的第一和第二光束。 沿着与第一方向垂直的第二方向放置光纤。 组合单元组合由调制单元输出的第一和第二光束，并将由第一和第二光束获得的光束组合到光纤。 组合单元包括偏振光旋转元件和偏振光组合元件。 偏振光旋转元件旋转第一光束的偏振方向。 偏振光组合元件反射偏振方向已经旋转的第一光束和第二方向的第二光束，并且组合在第二方向上反射的第一和第二光束。
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7.发明申请OPTICAL MODULATOR THAT INCLUDES OPTICAL WAVEGUIDE FORMED IN FERROELECTRIC SUBSTRATE 审中-公开包括在光电基板中形成的光波导的光学调制器公开(公告)号：US20170017097A1
公开(公告)日：2017-01-19
申请号：US15279604
申请日：2016-09-29
Applicant: FUJITSU OPTICAL COMPONENTS LIMITED
Inventor： Masaharu DOI , Yoshihiko YOSHIDA , Yoshinobu KUBOTA , Yoshitada KAWASHIMA
CPC classification number: G02F1/0036 , G02F1/0316 , G02F1/0508 , G02F1/225 , G02F1/2255 , G02F2001/212 , G02F2202/20 , G02F2202/22
Abstract: An optical modulator includes: a ferroelectric substrate in which an input optical waveguide, first and second optical waveguides, and an output optical waveguide are formed; a first electrode formed in a vicinity of the first optical waveguide and to which a first DC voltage is applied; a second electrode formed in a vicinity of the second optical waveguide and to which a second DC voltage is applied; a third electrode electrically connected to the first electrode and formed on both sides of the second electrode; and a fourth electrode electrically connected to the second electrode and formed on both sides of the first electrode. A first gap between the first electrode and the fourth electrode is approximately the same as a second gap between the second electrode and the third electrode. A gap between the third electrode and the fourth electrode is 1-5 times greater than the first gap.
Abstract translation: 光调制器包括：形成输入光波导，第一和第二光波导和输出光波导的铁电基板; 形成在第一光波导附近并施加第一直流电压的第一电极; 形成在所述第二光波导附近并且施加有第二DC电压的第二电极; 电连接到第一电极并形成在第二电极的两侧上的第三电极; 以及电连接到第二电极并形成在第一电极的两侧上的第四电极。 第一电极和第四电极之间的第一间隙与第二电极和第三电极之间的第二间隙大致相同。 第三电极和第四电极之间的间隙比第一间隙大1-5倍。
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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：US20210103165A1
公开(公告)日：2021-04-08
申请号：US16832647
申请日：2020-03-27
Applicant: TDK Corporation , FUJITSU OPTICAL COMPONENTS LIMITED
Inventor： Shinji IWATSUKA , Kenji SASAKI , Hiroki HARA , Yasuhiro OHMORI , Masaharu DOI , Shintaro TAKEUCHI , Yoshihiko YOSHIDA , Yoshinobu KUBOTA
Abstract: An electro-optic device is provided with a substrate, an optical waveguide formed of a lithium niobate film with a ridge shape on the substrate, and an electrode that applies an electric field to the optical waveguide. The optical waveguide includes a modulation waveguide provided in an electric field application region applied with the electric field and having a thickness of 1 μm or larger and a bent waveguide provided in a region other than the electric field application region and having a curvature radius of 16 μm or larger and 80 μm or smaller.
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公开(公告)号：US20210325761A1
公开(公告)日：2021-10-21
申请号：US17169983
申请日：2021-02-08
Applicant: Fujitsu Optical Components Limited
Inventor： Shuntaro MAKINO , Yoshinobu KUBOTA , Yasuhiro OHMORI , Masaharu DOI , Shintaro TAKEUCHI
Abstract: An optical waveguide device has a substrate, an intermediate layer, a thin-film LN layer containing an X-cut lithium niobate, and a buffer layer stacked on the substrate, and an optical waveguide having a ridge shape formed in the thin-film LN layer. The optical waveguide device includes a plurality of electrodes provided, respectively, at a first side and a second side of the optical waveguide. The electrodes are disposed so that respective bottom surfaces thereof are at positions lower than a position of a surface of the buffer layer.
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