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公开(公告)号：US11656486B2
公开(公告)日：2023-05-23
申请号：US17129576
申请日：2020-12-21
发明人： Yuki Kugimoto , Yumi Murata , Katsutoshi Kondo
CPC分类号： G02F1/035 , G02F1/225 , G02F2203/21
摘要： An optical waveguide device including an optical waveguide substrate that has an electro-optic effect, is a crystal having anisotropy in thermal expansion rate, has a thickness set to 10 μm or lower, and includes an optical waveguide and a holding substrate that holds the optical waveguide substrate, the optical waveguide substrate and the holding substrate being joined to each other, in which the holding substrate is formed of a crystal having a lower dielectric constant than the optical waveguide substrate and having anisotropy in thermal expansion rate, and the optical waveguide substrate and the holding substrate are joined to each other such that differences in thermal expansion rate between the optical waveguide substrate and the holding substrate become small in different axial directions on a joint surface.
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公开(公告)号：US10598849B2
公开(公告)日：2020-03-24
申请号：US16367726
申请日：2019-03-28
发明人： Shingo Takano , Yuki Kugimoto , Yoshizumi Ishikawa
摘要： An optical device including a core layer that includes an EO polymer, and clad layers that are disposed on and beneath the core layer, in which a polymer polymerized in a composition containing a reactive ionic liquid is used in the clad layers.
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公开(公告)号：US20220163720A1
公开(公告)日：2022-05-26
申请号：US17599721
申请日：2019-09-26
发明人： Yuki Kugimoto , Norikazu Miyazaki , Yu Kataoka
摘要： In an optical waveguide element, performance deterioration due to recoupling of unnecessary light leaking from an optical waveguide with the optical waveguide is prevented. An optical waveguide element includes an optical substrate on which an optical waveguide is formed, and a support substrate that is bonded to the optical substrate, on a bonded surface of the support substrate bonded to the optical substrate, a recess portion along the optical waveguide on the optical substrate is formed directly under the optical waveguide, a portion of the support substrate from an upper surface of the support substrate to at least a depth of a bottom surface of the recess portion has a refractive index higher than a substrate refractive index of the optical substrate, and the recess portion is filled with a substance having a refractive index lower than the substrate refractive index.
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