公开(公告)号：US20250060620A1

公开(公告)日：2025-02-20

申请号：US18765935

申请日：2024-07-08

Applicant: FUJITSU OPTICAL COMPONENTS LIMITED

Inventor： Masaki SUGIYAMA ,  Suguru AKIYAMA

IPC: G02F1/035

Abstract: An optical device has a first chip including a first waveguide and a first electrode, and a second chip mounted on the first chip and including a second waveguide and a second electrode. The second waveguide has an electro-optic effect higher than an electro-optic effect of the first waveguide and has a return structure that places an end of the second waveguide at an end face of the second chip. The second waveguide has been optically coupled to the first waveguide at the end face. The second electrode has a return structure that places an end of the second electrode at the end face, and the second electrode and the first electrode are electrically connected to each other in an area where the end of the second electrode has been placed.

公开(公告)号：US20230238774A1

公开(公告)日：2023-07-27

申请号：US18065954

申请日：2022-12-14

Applicant: Fujitsu Optical Components Limited

Inventor： Hirotomo IZUMI ,  Suguru AKIYAMA ,  Ayahito UETAKE ,  Seimi SASAKI

IPC: H01S5/10 ,  H01S5/14 ,  H01S5/50 ,  H01S5/026

CPC classification number: H01S5/1014 ,  H01S5/141 ,  H01S5/50 ,  H01S5/026

Abstract: A wavelength tunable laser device includes: a first mirror; a second mirror; an optical amplifier provided between the first mirror and the second mirror; a wavelength tunable filter provided between the first mirror and the second mirror; and an optical waveguide coupling the optical amplifier and the wavelength tunable filter. The optical waveguide includes a first waveguide formed with a first width and a second waveguide formed with a second width wider than the first width.