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公开(公告)号：US11693290B2
公开(公告)日：2023-07-04
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
CPC classification number: G02F1/225 , G02F1/035 , G02F1/0316 , G02F2201/07 , G02F2201/12 , G02F2202/20
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：US10054744B2
公开(公告)日：2018-08-21
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.
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公开(公告)号：US20180095225A1
公开(公告)日：2018-04-05
申请号：US15689617
申请日：2017-08-29
Applicant: Fujitsu Optical Components Limited
Inventor： Shinji MARUYAMA , Yoshinobu Kubota , Yoshimitsu Sakai
CPC classification number: G02B6/30 , G02F1/0311 , G02F1/035
Abstract: An optical module includes a substrate on which an optical waveguide is provided; a housing that houses the substrate and includes a through path arranged on a side wall of the housing so as to extend in a direction that crosses the optical waveguide; a ferrule that houses an end portion of an optical fiber; and an optical path conversion element that is fixed on the ferrule, that is fixed on an end surface of the substrate on the end portion side of the optical waveguide, and that has a size smaller than a width of the substrate and a width of the ferrule along a longitudinal direction of the substrate. The end portion of the optical waveguide is arranged at a position close to the through path of the housing relative to a central portion in a width direction of the substrate.
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公开(公告)号：US20180031869A1
公开(公告)日：2018-02-01
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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公开(公告)号：US09651804B2
公开(公告)日：2017-05-16
申请号：US14943736
申请日：2015-11-17
Applicant: Fujitsu Optical Components Limited
Inventor： Masaki Sugiyama , Akira Ishii , Yoshinobu Kubota
CPC classification number: G02F1/0316 , G02B6/4201 , G02F1/035 , G02F1/225
Abstract: An optical module includes a package, a substrate, a lead pin, and a ground pattern. The substrate is accommodated in the package, includes a signal line pattern that transmits an electric signal, extends toward a side wall of the package beyond an end of the signal line pattern, and has a through hole between the end of the signal line pattern and the side wall of the package. The lead pin is inserted into the through hole in the substrate and inputs the electric signal to the end of the signal line pattern. The ground pattern is provided in at least a part of regions surrounding the through hole on the substrate.
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Patent Agency Ranking
公开(公告)号：US20210373416A1
公开(公告)日：2021-12-02
申请号：US17168842
申请日：2021-02-05
Applicant: Fujitsu Optical Components Limited
Inventor： Shinji Maruyama , Shuntaro Makino , Yoshimitsu SAKAI , Yoshinobu Kubota
IPC: G02F1/31
Abstract: An optical modulator in which an optical signal is input from one side of a package, includes in the package, a chip that optically modulates the optical signal and in which an input waveguide and an output waveguide of the optical signal are led to mutually different destinations each being one end of the chip facing the one side of the package and a side surface of the chip orthogonal to the one end of the chip; an input optical system coupled to the input waveguide of the chip; and an output optical system coupled to the output waveguide of the chip.
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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：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：US20220373828A1
公开(公告)日：2022-11-24
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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