公开(公告)号：US12265257B2

公开(公告)日：2025-04-01

申请号：US17716440

申请日：2022-04-08

Applicant: TDK CORPORATION

Inventor： Kenji Nagase ,  Hiroshi Take ,  Anthony Reymund Melad Binarao ,  Cheng Bu Heng

IPC: G02B6/125 ,  G02B6/12 ,  G02F1/035 ,  G02F1/21 ,  G02F1/225

Abstract: An optical modulator includes a substrate; an electro-optical material layer formed on a predetermined region of the substrate; a buffer layer formed on the substrate which is provided so as to cover the electro-optical material layer; and an electrode formed on the buffer layer. The electro-optical material layer has a RF portion optical waveguide which is applied with a modulation signal and is patterned, and a DC portion optical waveguide which is applied with a DC voltage and is patterned. The electrode has an RF portion electrode formed on the buffer layer where the RF portion optical waveguide is located and a DC portion electrode formed on the buffer layer where the DC portion optical waveguide is located. The film thickness of the DC portion electrode is smaller than the film thickness of the RF portion electrode.

公开(公告)号：US20240329316A1

公开(公告)日：2024-10-03

申请号：US18619841

申请日：2024-03-28

Applicant: TDK CORPORATION

Inventor： Hiroshi Take ,  Kenji Nagase ,  Anthony Reymund Melad Binarao ,  Cheng Bu Heng

IPC: G02B6/293

CPC classification number: G02B6/2938

Abstract: An optical device includes: a substrate; and at least two optical waveguides formed on the substrate and facing to a multiplexed portion on the substrate in a light propagation direction, the optical waveguide includes a lamellar portion and a protruding portion which protrudes from the lamellar portion, in a cross section perpendicular to the light propagation direction, the thickness of the lamellar portion between the protruding portions of the at least two optical waveguides is greater than the thickness of the lamellar portion at the side of a side surface of the protruding portion of the optical waveguides, which does not face to other optical waveguides. Thereby, the transmission loss of light during multiplexing light can be reduced.

公开(公告)号：US12085791B2

公开(公告)日：2024-09-10

申请号：US17797213

申请日：2021-01-20

Applicant: TDK Corporation

Inventor： Shinji Iwatsuka ,  Hiroki Hara ,  Anthony Reymund Melad Binarao ,  Cheng Bu Heng ,  Hiroshi Take ,  Kenji Nagase

IPC: G02F1/035

CPC classification number: G02F1/035 ,  G02F2202/20

Abstract: An optical waveguide element includes: an optical waveguide having a ridge part and a slab part having a thickness less than the ridge part. The optical waveguide includes: a first waveguide having a first ridge with and a first slab film thickness; a second waveguide having a second ridge width and a second slab film thickness; a first intermediate waveguide connected to the first waveguide and having a third ridge width and the first slab film thickness; and a second intermediate waveguide connected to the second waveguide and having a fourth ridge width and the second slab film thickness. The first waveguide, the first intermediate waveguide, the second intermediate waveguide, and the second waveguide are arranged in this order; the second slab film thickness is larger than the first slab film thickness; and the third ridge width is larger than the fourth ridge width.

公开(公告)号：US12271094B2

公开(公告)日：2025-04-08

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

IPC: G02F1/225 ,  G02F1/035 ,  G02F1/21

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.

公开(公告)号：US12292627B2

公开(公告)日：2025-05-06

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

IPC: G02F1/225 ,  G02B6/12 ,  G02B6/122 ,  G02F1/03 ,  G02F1/035 ,  G02F1/21

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.

公开(公告)号：US12164185B2

公开(公告)日：2024-12-10

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

IPC: G02F1/035 ,  G02F1/225 ,  G02B6/12 ,  G02F1/21

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.

公开(公告)号：US11947147B2

公开(公告)日：2024-04-02

申请号：US17707055

申请日：2022-03-29

Applicant: TDK CORPORATION

Inventor： Kenji Nagase ,  Hiroshi Take ,  Anthony Reymund Melad Binarao ,  Cheng Bu Heng

IPC: F21V8/00

CPC classification number: G02B6/0016 ,  G02B6/0065 ,  G02B6/0093

Abstract: An optical device including: a substrate; an optical waveguide formed at the substrate; and a protective layer formed adjacent to the optical waveguide, wherein the optical waveguide includes multiple side surfaces that intersect the substrate, at least one side surface of the optical waveguide is provided with a rough surface. According to the optical device of the present invention, the light propagation loss can be reduced.