公开(公告)号：US20240272512A1

公开(公告)日：2024-08-15

申请号：US18406795

申请日：2024-01-08

Applicant: FUJITSU OPTICAL COMPONENTS LIMITED

Inventor： Nobuaki MITAMURA ,  Kazumasa SATO

IPC: G02F1/225 ,  G02F1/01 ,  G02F1/21

CPC classification number: G02F1/2252 ,  G02F1/0136 ,  G02F1/2257 ,  G02F1/212

Abstract: An optical device has an optical modulator element and an optical receiver element. The optical modulator element includes a first optical waveguide extending to a first end face, a first inter-element waveguide extending to a second end face, and an optical modulator including an electro-optic material. The optical receiver element includes a second optical waveguide extending to a third end face, a second inter-element waveguide extending to a fourth end face, an optical receiver, and a polarization element. In the optical device, the first inter-element waveguide and the second inter-element waveguide have been connected to each other by being butted against each other.

公开(公告)号：US20250035967A1

公开(公告)日：2025-01-30

申请号：US18753015

申请日：2024-06-25

Applicant: FUJITSU OPTICAL COMPONENTS LIMITED

Inventor： Kazumasa SATO ,  Nobuaki MITAMURA

IPC: G02F1/03 ,  G02F1/035 ,  H04B10/40

Abstract: An optical modulator includes an electro-optic layer including an electro-optic material, and a material layer arranged below the electro-optic layer and having a dielectric constant lower than a dielectric constant of the electro-optic layer. The optical modulator includes a core layer arranged below the material layer and having a refractive index higher than refractive indices of the electro-optic layer and the material layer, and an electrode that applies an electric signal to the electro-optic layer. The refractive index of the material layer is 0.85 times the refractive index of the electro-optic layer or higher.

公开(公告)号：US20250035851A1

公开(公告)日：2025-01-30

申请号：US18746486

申请日：2024-06-18

Applicant: FUJITSU OPTICAL COMPONENTS LIMITED

Inventor： Yurika YANADA ,  Nobuaki MITAMURA

IPC: G02B6/30

Abstract: An optical device includes an optical element and an optical fiber block. The optical element includes an optical waveguide, a first end face on which an end face of the optical waveguide is disposed, and a second end face protruding from the first end face. The optical fiber block includes an optical fiber, a third end face on which an end face of the optical fiber is disposed, and a fourth end face recessed from the third end face. In the optical device, in a state where the second end face and the fourth end face are fixed so as to be in contact with each other, the first end face and the third end face are connected by butt coupling to optically couple the end face of the optical waveguide and the end face of the optical fiber.

公开(公告)号：US20230161184A1

公开(公告)日：2023-05-25

申请号：US17947657

申请日：2022-09-19

Applicant: FUJITSU OPTICAL COMPONENTS LIMITED

Inventor： Shuntaro MAKINO ,  Teruo KURAHASHI ,  Yoshinobu KUBOTA ,  Yoshihiko YOSHIDA ,  Nobuaki MITAMURA ,  Takehito TANAKA

IPC: G02F1/035

CPC classification number: G02F1/035

Abstract: An optical device includes a substrate, a first cladding layer that is laminated on one surface of the substrate, and a first optical waveguide that is formed in the first cladding layer at a side opposite to the substrate in the first cladding layer. The optical device further includes an electro-optic crystal layer that is laminated on a surface of the first cladding layer at a side opposite to the substrate, and a second optical waveguide that is formed of the electro-optic crystal layer on a surface of the electro-optic crystal layer at a side opposite to the first cladding layer. The optical device further includes a second cladding layer that is laminated on a surface of the electro-optic crystal layer at a side opposite to the first cladding layer.