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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
摘要： 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：US11086149B2
公开(公告)日：2021-08-10
申请号：US16832784
申请日：2020-03-27
发明人： Shinji Iwatsuka , Kenji Sasaki , Hiroki Hara , Yasuhiro Ohmori , Masaharu Doi , Shintaro Takeuchi , Yoshihiko Yoshida , Yoshinobu Kubota
摘要： 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：US10989980B2
公开(公告)日：2021-04-27
申请号：US16799753
申请日：2020-02-24
发明人： Shinji Iwatsuka , Kenji Endou , Hiroki Hara , Toshinori Matsuura , Takashi Kikukawa , Yasuhiro Ohmori , Masaharu Doi , Shintaro Takeuchi , Takehito Tanaka , Yoshinobu Kubota
摘要： 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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公开(公告)号：US11003044B2
公开(公告)日：2021-05-11
申请号：US16799770
申请日：2020-02-24
发明人： Hiroki Hara , Shinji Iwatsuka , Takashi Kikukawa , Toshinori Matsuura , Yasuhiro Ohmori , Masaharu Doi , Shintaro Takeuchi , Yoshinobu Kubota
摘要： 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
发明人： Yasuhiro Ohmori , Masaharu Doi , Shintaro Takeuchi , Takehito Tanaka , Yoshinobu Kubota , Shinji Iwatsuka , Kenji Endou , Hiroki Hara , Toshinori Matsuura , Takashi Kikukawa
摘要： 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：US10754179B2
公开(公告)日：2020-08-25
申请号：US16515573
申请日：2019-07-18
摘要： 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：US09405081B2
公开(公告)日：2016-08-02
申请号：US14629899
申请日：2015-02-24
发明人： Shinji Maruyama , Seimi Sasaki , Kohei Shibata , Teruhiro Kubo , Shintaro Takeuchi , Hiroshi Kato , Takehito Tanaka
CPC分类号： G02B6/4244 , G02F1/225 , G02F2201/18 , G02F2201/58 , G02F2203/28
摘要： An optical transmitting apparatus includes: a substrate; optical modulators that are arranged in parallel to one another on the substrate and modulate light; waveguides that are formed on the substrate and guide signal light represented by at least one of modulated light beams obtained by the light being modulated by the plurality of optical modulators and monitor light represented by at least another one of the modulated light beams other than the signal light; lenses that collimate the signal light and the monitor light emitted from the waveguides; and a holding member that causes the signal light and the monitor light to be emitted from the lenses in mutually-different directions, by holding the lenses in such a manner that the optical axis of at least one of the lenses is out of alignment in a predetermined direction with the optical axis of at least one of the waveguides.
摘要翻译： 光发送装置包括：基板; 在衬底上彼此平行布置并调制光的光学调制器; 形成在基板上的波导，并且引导由由多个光调制器调制的光获得的调制光束中的至少一个所表示的信号光，并且监视由除信号之外的至少另一个调制光束表示的光 光; 准直信号光和从波导发射的监视光的透镜; 以及保持构件，其通过以这样的方式保持透镜来使信号光和监视光从透镜发射在相互不同的方向上，使得至少一个透镜的光轴在 预定方向与至少一个波导的光轴。
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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
发明人： Shuntaro Makino , Yoshinobu Kubota , Yasuhiro Ohmori , Masaharu Doi , Masaki Sugiyama , Shintaro Takeuchi , Yoshihiko Yoshida , Shinji Maruyama , Teruo Kurahashi
CPC分类号： G02F1/0353 , G02F1/212 , G02F1/225 , G02F2202/20 , H04J14/02
摘要： 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
CPC分类号： G02F1/225 , G02B6/0065 , G02F1/0316 , G02F2201/07
摘要： 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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公开(公告)号：US20210325760A1
公开(公告)日：2021-10-21
申请号：US17165562
申请日：2021-02-02
发明人： Shuntaro Makino , Yoshinobu Kubota , Yasuhiro Ohmori , Masaharu Doi , Teruo Kurahashi , Shintaro Takeuchi
摘要： 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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