公开(公告)号：US12242143B2

公开(公告)日：2025-03-04

申请号：US17699746

申请日：2022-03-21

Applicant: Fujitsu Optical Components Limited

Inventor： Yoshihiko Yoshida ,  Nobuaki Mitamura ,  Shuntaro Makino ,  Yoshinobu Kubota

IPC: G02F1/03 ,  G02F1/035 ,  H04B10/50

Abstract: An optical device includes a silicon substrate, a waveguide formed of a thin film that is laminated on the silicon substrate and that is made of a perovskite oxide with a large electro-optic effect as compared to lithium niobate, and a cladding layer that covers the waveguide. Further, the optical device includes ground electrode that has a ground potential and a signal electrode that is arranged at a position facing the ground electrode and that applies driving voltage to the waveguide.

公开(公告)号：US12153294B2

公开(公告)日：2024-11-26

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

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.

公开(公告)号：US11709384B2

公开(公告)日：2023-07-25

申请号：US17332292

申请日：2021-05-27

Applicant: Fujitsu Optical Components Limited

Inventor： Nobuaki Mitamura

IPC: G02F1/065 ,  G02F1/1337 ,  G02B6/122 ,  G02F1/035 ,  G02B6/12

CPC classification number: G02F1/065 ,  G02B6/122 ,  G02F1/035 ,  G02F1/133711 ,  G02B2006/12085 ,  G02B2006/12142 ,  G02F2202/022

Abstract: A multilayer film includes a single-crystal silicon layer, a first layer containing Zr, a second layer containing ZrO2, and a third layer containing a perovskite oxide having an electrooptic effect. The first layer, the second layer, and the third layer are provided in this order above the single-crystal silicon layer, and the multilayer film is transparent to a wavelength to be used.

公开(公告)号：US11442298B2

公开(公告)日：2022-09-13

申请号：US16944591

申请日：2020-07-31

Applicant: Fujitsu Optical Components Limited

Inventor： Nobuaki Mitamura

IPC: G02F1/065 ,  G02F1/03

Abstract: An optical modulation device includes a substrate, a slot waveguide formed by arranging a pair of electrodes in a groove formed on one side of the substrate and by filling the groove with an electro-optical material, a dielectric film that covers a surface of the electro-optic material filled in the slot waveguide, and a plate member that covers the slot waveguide and is bonded to the dielectric film with an adhesive resin.

公开(公告)号：US09952441B2

公开(公告)日：2018-04-24

申请号：US15358553

申请日：2016-11-22

Applicant: Fujitsu Optical Components Limited

Inventor： Nobuaki Mitamura

IPC: G02B27/14 ,  G02B27/10 ,  H01S5/0683 ,  G02B5/26 ,  G02B6/42 ,  G02B6/293

CPC classification number: G02B27/1006 ,  G02B5/26 ,  G02B6/29365 ,  G02B6/4215 ,  G02B6/4286 ,  H01S5/005 ,  H01S5/0078 ,  H01S5/02284 ,  H01S5/0683 ,  H01S5/4012 ,  H01S5/4087

Abstract: The filter transmits a light beam of a second wavelength emitted from each of a plurality of second light sources, reflects other light beams incident from a direction intersecting a traveling direction of the light beam of the second wavelength, and outputs a combined light of the light beam of the second wavelength and the other light beams. The first optical element transmits part of the light beam of the first wavelength emitted from the first light source or part of the light beam of the second wavelength included in the combined light output from the filter, and reflects the other light beams excluding the part thereof in the direction intersecting the traveling direction. The first light receiving element receives the part of the light beam of the first wavelength transmitted by the first optical element or the part of the light beam of the second wavelength.