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公开(公告)号：US12197054B2
公开(公告)日：2025-01-14
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：US10303036B2
公开(公告)日：2019-05-28
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
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：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：US11086149B2
公开(公告)日：2021-08-10
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：US10082683B2
公开(公告)日：2018-09-25
申请号：US15617478
申请日：2017-06-08
Applicant: Fujitsu Optical Components Limited
Inventor： Yoshihiko Yoshida , Masaharu Doi , Yoshinobu Kubota
CPC classification number: G02F1/0027 , G02F1/225 , G02F2001/212 , G02F2201/501
Abstract: An optical modulator includes: a ferroelectric substrate in which an input optical waveguide, a pair of branched optical waveguides, and an output optical waveguide are formed; a signal electrode that is formed in a vicinity of at least one of the pair of branched optical waveguides; a first protection member that is attached to an input end of the ferroelectric substrate in which the input optical waveguide is formed; and a second protection member that is attached to an output end of the ferroelectric substrate in which the output optical waveguide is formed. The first protection member and the second protection member have a Mohs hardness that is less than or equal to a Mohs hardness of the ferroelectric substrate, and are formed of a glass material that does not have a pyroelectric effect.
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Patent Agency Ranking
公开(公告)号：US12242143B2
公开(公告)日：2025-03-04
申请号：US17699746
申请日：2022-03-21
Applicant: Fujitsu Optical Components Limited
Inventor： Yoshihiko Yoshida , Nobuaki Mitamura , Shuntaro Makino , Yoshinobu Kubota
Abstract: An optical device includes a silicon substrate, a waveguide formed of a thin film that is laminated on the silicon substrate and that is made of a perovskite oxide with a large electro-optic effect as compared to lithium niobate, and a cladding layer that covers the waveguide. Further, the optical device includes ground electrode that has a ground potential and a signal electrode that is arranged at a position facing the ground electrode and that applies driving voltage to the waveguide.
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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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公开(公告)号：US10281748B2
公开(公告)日：2019-05-07
申请号：US15729220
申请日：2017-10-10
Applicant: Fujitsu Optical Components Limited
Inventor： Toyokazu Sasaki , Yoshihiko Yoshida , Yasuhiro Ohmori , Yoshinobu Kubota
Abstract: An optical modulator includes a substrate having an electro-optic effect; a waveguide pattern provided on the substrate and configured to modulate light; and a dummy pattern having a predetermined potential along the waveguide pattern from an input side to an output side.
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公开(公告)号：US09335490B2
公开(公告)日：2016-05-10
申请号：US14329026
申请日：2014-07-11
Applicant: FUJITSU OPTICAL COMPONENTS LIMITED
Inventor： Shinji Maruyama , Yoshihiko Yoshida , Tomoyuki Ito , Yoshihiro Takahashi , Yoshinobu Kubota
CPC classification number: G02B6/42 , G02B6/4214 , G02B2006/12166 , G02F2201/58 , H04B10/50 , H04B10/60 , Y10T29/49128
Abstract: An optical device includes a substrate having an electrooptical effect, and including an optical waveguide that guides light and a reflection groove having a bottom face that reflects light output from the optical waveguide; and a light-receiving element positioned above the reflection groove and fixed to the substrate. The light output from the optical waveguide into the reflection groove is reflected by the bottom face of the reflection groove while traveling through a space inside the reflection groove and is incident to the light-receiving element.
Abstract translation: 光学器件包括具有电光效应的衬底，并且包括引导光的光波导和具有反射从光波导输出的光的底面的反射槽; 以及位于反射槽上方并固定于基板的光接收元件。 从光波导输出到反射槽的光在反射槽内反射并反射到反射槽的底面并入射到光接收元件。
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