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公开(公告)号：US20180081251A1
公开(公告)日：2018-03-22
申请号：US15647719
申请日：2017-07-12
Applicant: Fujitsu Optical Components Limited
Inventor： Shintaro TAKEUCHI , YOSHIHIKO YOSHIDA , Yoshinobu Kubota , Masaharu Doi , Yasuhiro Ohmori
IPC: G02F1/225
CPC classification number: G02F1/225 , G02F2001/212 , G02F2201/06
Abstract: An optical modulator includes a substrate and an optical waveguide group. The optical waveguide group includes a pair of relay optical waveguides, a pair of first Mach-Zehnder type optical waveguides, and a pair of second Mach-Zehnder type optical waveguides. The pair of the first Mach-Zehnder type optical waveguides are connected to the pair of the relay optical waveguides and includes input ends arranged at positions that deviate from each other in a longitudinal direction of the substrate. The pair of the second Mach-Zehnder type optical waveguides are provided on a pair of branched waveguides of each of the first Mach-Zehnder type optical waveguides and includes input ends arranged at symmetric positions with respect to a straight line that passes through an input end serving as a branch point of the branched waveguides and that extends in the longitudinal direction of the substrate.
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公开(公告)号：US09740077B2
公开(公告)日：2017-08-22
申请号：US15229800
申请日：2016-08-05
Applicant: Fujitsu Optical Components Limited
Inventor： Masaharu Doi , Yoshinobu Kubota
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：US09709743B2
公开(公告)日：2017-07-18
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.
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公开(公告)号：US11003044B2
公开(公告)日：2021-05-11
申请号：US16799770
申请日：2020-02-24
Applicant: TDK Corporation , FUJITSU OPTICAL COMPONENTS LIMITED
Inventor： Hiroki Hara , Shinji Iwatsuka , Takashi Kikukawa , Toshinori Matsuura , Yasuhiro Ohmori , Masaharu Doi , Shintaro Takeuchi , Yoshinobu Kubota
Abstract: An electro-optic device is provided with a Mach-Zehnder optical waveguide including at least one linear section and at least one curved section and a differential RF signal electrode provided along the Mach-Zehnder optical waveguide. Optical input/output ports of the Mach-Zehnder optical waveguide are provided at one end side in a first direction in which the linear section extends. The differential RF signal electrode is provided in both the linear and curved sections.
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公开(公告)号：US11003043B2
公开(公告)日：2021-05-11
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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Patent Agency Ranking
公开(公告)号：US10754179B2
公开(公告)日：2020-08-25
申请号：US16515573
申请日：2019-07-18
Applicant: Fujitsu Optical Components Limited
Inventor： Yasuhiro Ohmori , Yoshinobu Kubota , Masaharu Doi , Shintaro Takeuchi , Yoshihiko Yoshida
Abstract: An optical modulator includes an optical waveguide of a ridge type formed of a thin film of a dielectric material having an electro-optic effect over a substrate, a buffer layer covering the optical waveguide, and a signal electrode provided over the optical waveguide via the buffer layer, wherein a width of the signal electrode is greater than a ridge width of the optical waveguide and wherein the signal electrode covers at least one of sidewalls of a ridge of the optical waveguide.
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公开(公告)号：US10175553B2
公开(公告)日：2019-01-08
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
IPC: G02F1/225 , G02B6/126 , H01R9/05 , H01R12/51 , H01R12/59 , H01R12/79 , H01R24/38 , H01R12/70 , H01R24/50
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：US20160313510A1
公开(公告)日：2016-10-27
申请号：US15067949
申请日：2016-03-11
Applicant: Fujitsu Optical Components Limited
Inventor： Masaharu Doi , Akira Ishii , Teruhiro Kubo , Yoshinobu Kubota
CPC classification number: G02B6/30 , G02B6/32 , G02B6/34 , G02F1/225 , G02F2203/02
Abstract: An optical module includes a substrate on which an optical waveguide is formed, and an optical fiber assembly. The optical fiber assembly includes an optical fiber, a translucent member, and a mirror portion. The translucent member includes a joint surface joined to an end surface of the substrate at an end of the optical waveguide, and is attached to a distal end of the optical fiber. The mirror portion is formed on the translucent member, reflects light emitted from the distal end of the optical fiber in a direction different from a traveling direction of the light, and collects the reflected light into the end of the optical waveguide through the joint surface.
Abstract translation: 光学模块包括其上形成有光波导的基板和光纤组件。 光纤组件包括光纤，半透明部件和镜部分。 半透明构件包括在光波导的端部处接合到基板的端面的接合表面，并且附接到光纤的远端。 反射镜部形成在半透明部件上，从与光的行进方向不同的方向反射从光纤的前端射出的光，并将反射光通过接合面收集到光波导的端部。
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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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公开(公告)号：US11693291B2
公开(公告)日：2023-07-04
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
CPC classification number: G02F1/225 , G02B6/0065 , G02F1/0316 , G02F2201/07
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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