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公开(公告)号：US20230296929A1
公开(公告)日：2023-09-21
申请号：US18164712
申请日：2023-02-06
Applicant: TDK Corporation
Inventor： Hiroki HARA , Takashi KIKUKAWA , Hiroshi TAKE , Kenji NAGASE , Shuntaro KODAMA
CPC classification number: G02F1/0305 , G02F1/035 , G02F1/212 , G02F1/2255 , G02F2202/20
Abstract: An optical modulation element is provided with a substrate, a waveguide layer formed on the substrate, a dielectric layer formed on the waveguide layer, and an electrode formed on the dielectric layer. An outer peripheral end portion of the dielectric layer has an offset area positioned inside an outer peripheral end portion of the substrate. In at least a part of the offset area, a distance from the outer peripheral end portion of the substrate to the outer peripheral end portion of the dielectric layer is equal to or less than a distance from the outer peripheral end portion of the substrate to the outer peripheral end portion of the electrode.
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公开(公告)号：US20230112785A1
公开(公告)日：2023-04-13
申请号：US17914140
申请日：2021-03-31
Applicant: TDK CORPORATION
Inventor： Kenji NAGASE , Hiroshi TAKE
Abstract: An electro-optical device, including: a substrate; an optical waveguide film formed of electro-optical material provided in a predetermined region on the substrate; a buffer layer provided adjacent to the optical waveguide film; and an electrode for applying an electric field to the optical waveguide film, and a non-light-transmission optical waveguide film is provided outside the predetermined region. According to the electro-optical device of the present disclosure, the propagation loss of light can be suppressed.
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公开(公告)号：US20230057036A1
公开(公告)日：2023-02-23
申请号：US17797207
申请日：2021-01-20
Applicant: TDK Corporation
Inventor： Anthony Reymund Melad Binarao , Cheng Bu HENG , Hiroshi TAKE , Kenji NAGASE , Shinji IWATSUKA , Hiroki HARA
Abstract: To provide an optical modulation element whereby reduced drive voltage and suppression of DC drift can be obtained at the same time. An optical modulation element includes: a substrate; and an optical waveguide formed of an electrooptic material film formed on the substrate and having a ridge part which is a protruding portion, and a slab part having a smaller film thickness than the ridge part 11r. The optical waveguide includes a first waveguide part having a first ridge width and a first slab film thickness and to which an RF signal is applied, and a second waveguide part having a second ridge width and a second slab film thickness different from the first slab film thickness and to which a DC bias is applied.
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公开(公告)号：US20240377696A1
公开(公告)日：2024-11-14
申请号：US18293020
申请日：2022-09-28
Applicant: TDK CORPORATION
Inventor： Hiroshi TAKE , Kenji NAGASE , Anthony Reymund Melad BINARAO , Cheng Bu HENG
Abstract: An optical device, including a substrate and a plurality of optical waveguide paths formed on the substrate and having slab portions with different thicknesses.
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公开(公告)号：US20240329307A1
公开(公告)日：2024-10-03
申请号：US18620044
申请日：2024-03-28
Applicant: TDK Corporation
Inventor： Hiroshi TAKE , Kenji NAGASE , Anthony Reymund Melad BINARAO , Cheng Bu HENG
CPC classification number: G02B6/122 , G02B2006/1204 , G02B2006/12045
Abstract: An optical device includes: a substrate; and at least two optical waveguides formed on the substrate and facing a multiplexed portion on the substrate in a light propagation direction, wherein in a cross section perpendicular to the light propagation direction, an angle formed between the substrate and a side surface of one optical waveguide, which faces the other optical waveguides, is set to α, and an angle formed between the substrate and a side surface of one optical waveguide, which does not face the other optical waveguides, is set to β, satisfying α
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Patent Agency Ranking
公开(公告)号：US20230333417A1
公开(公告)日：2023-10-19
申请号：US18028857
申请日：2021-09-29
Applicant: TDK CORPORATION
Inventor： Kenji NAGASE , Hiroshi TAKE , Anthony Reymund Melad BINARAO , Cheng Bu HENG
CPC classification number: G02F1/035 , G02F1/212 , G02F1/225 , G02F2202/20
Abstract: An optical modulator, including: a substrate; a plurality of electro-optic material layers formed on the substrate; and an electrode formed on the electro-optic material layer; wherein the electro-optic material layer has a patterned RF portion waveguide that applies a modulated signal and a patterned DC portion waveguide that applies a direct current bias signal; and on a section perpendicular to a light propagation direction, the sectional area of the DC portion waveguide is greater than the sectional area of the RF portion waveguide.
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公开(公告)号：US20230314852A1
公开(公告)日：2023-10-05
申请号：US18190252
申请日：2023-03-27
Applicant: TDK CORPORATION
Inventor： Kenji NAGASE , Hiroshi TAKE , Anthony Reymund Melad BINARAO , Cheng Bu HENG
CPC classification number: G02F1/035 , G02F1/212 , G02F1/225 , G02F2202/20
Abstract: An optical device, including a substrate; an optical waveguide provided in a predetermined region of the substrate and formed of an electro-optic material film; a protective layer formed adjacent to the optical waveguide; and a non-light-propagation optical waveguide provided outside the predetermined region, wherein the surface roughness of the non-light-propagation optical waveguide is RMS 0.5 nm or more. According to the optical device, the occurrence of micro-cracks on the optical waveguide can be suppressed, thereby reducing the light propagation loss.
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公开(公告)号：US20230122741A1
公开(公告)日：2023-04-20
申请号：US17914238
申请日：2021-03-31
Applicant: TDK CORPORATION
Inventor： Hiroshi TAKE , Kenji NAGASE , Anthony Reymund Melad BINARAO , Cheng Bu HENG
Abstract: An optical modulators is disclosed. The optical modulator includes a substrate, an optical waveguide formed on the substrate, a signal electrode formed on the optical waveguide via a first buffer layer and applying a modulation signal to the optical waveguide, and a bias electrode formed on the optical waveguide via a second buffer layer and applying a DC bias to the optical waveguide, the first buffer layer and the second buffer layer are formed in such a way that either one of the first buffer layer and the second buffer layer covers an end surface of the other one of the first buffer layer and the second buffer layer at a boundary part of the first buffer layer and the second buffer layer. Accordingly, an optical modulator with high reliability can be provided.
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公开(公告)号：US20230115362A1
公开(公告)日：2023-04-13
申请号：US17914280
申请日：2021-03-31
Applicant: TDK CORPORATION
Inventor： Kenji NAGASE , Hiroshi TAKE , Shingo MIYATA
Abstract: An electro-optical device, including: a substrate; an optical waveguide composed of an electro-optic material film formed in a ridge shape on the substrate; a buffer layer configured to cover the optical waveguide; and an upper electrode provided on the optical waveguide through the buffer layer, and the buffer layer has a recess on the upper electrode side above the optical waveguide. Accordingly, the propagation loss of light can be suppressed.
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公开(公告)号：US20220326555A1
公开(公告)日：2022-10-13
申请号：US17707675
申请日：2022-03-29
Applicant: TDK CORPORATION
Inventor： Hiroshi TAKE , Kenji NAGASE , Anthony Reymund Melad BINARAO , Cheng Bu HENG , Atsushi SHIMURA
Abstract: The optical device includes a substrate and an optical waveguide formed on the substrate, a protrusion portion is formed on the substrate adjacent to the optical waveguide. Accordingly, an optical device which can achieve further suppression of the light propagation loss and higher reliability is provided
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