-
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.
-
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.
-
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.
-
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.
-
公开(公告)号：US20200271963A1
公开(公告)日：2020-08-27
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.
-
公开(公告)号：US10095080B2
公开(公告)日：2018-10-09
申请号：US15650222
申请日：2017-07-14
摘要： 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.
-
公开(公告)号：US10082683B2
公开(公告)日：2018-09-25
申请号：US15617478
申请日：2017-06-08
CPC分类号： G02F1/0027 , G02F1/225 , G02F2001/212 , G02F2201/501
摘要： 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.
-
公开(公告)号：US11693290B2
公开(公告)日：2023-07-04
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
CPC分类号： G02F1/225 , G02F1/035 , G02F1/0316 , G02F2201/07 , G02F2201/12 , G02F2202/20
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.
-
公开(公告)号：US10295883B2
公开(公告)日：2019-05-21
申请号：US15649185
申请日：2017-07-13
发明人： Shinji Maruyama , Masaharu Doi
摘要： An optical module includes a driver that is provided on a board and generates an electrical signal according to a data signal, and an optical modulator that is connected to an optical fiber and provided on the board and that modulates light emitted from the optical fiber using the electrical signal generated by the driver. The optical module has a cut-out portion that is formed by cutting out part of its outer shape and that accommodates the driver so that the driver overlaps the optical fiber when viewed from a direction perpendicular to the board.
-
公开(公告)号：US10054744B2
公开(公告)日：2018-08-21
申请号：US15067949
申请日：2016-03-11
发明人： Masaharu Doi , Akira Ishii , Teruhiro Kubo , Yoshinobu Kubota
CPC分类号： G02B6/30 , G02B6/32 , G02B6/34 , G02F1/225 , G02F2203/02
摘要： 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.
-
-
-
-
-
-
-
-
-
搜索结果
28 条记录 (耗时 0.021 秒)
