公开(公告)号：US20210341288A1

公开(公告)日：2021-11-04

申请号：US17261726

申请日：2019-07-17

Applicant: JAPAN AEROSPACE EXPLORATION AGENCY ,  OPTOQUEST CO., LTD.

Inventor： Shinji MITANI ,  Kenichiro NIGO ,  Tadahito MIZUTANI ,  Satoshi KARASAWA ,  Yusaku TOTTORI ,  Taketoshi TAKAHATA ,  Haruyuki ENDO ,  Yuichi TAKUSHIMA ,  Shigeru NAKAMURA

IPC: G01C19/72

Abstract: [Object] To provide an interferometric optical fiber gyroscope that can perform higher-accuracy measurement and can be produced at a low cost.
[Solving Means] An interferometric optical fiber gyroscope is an interferometric optical fiber gyroscope that detects angular velocity by optical interference between counterclockwise light and clockwise light. In such an interferometric optical fiber gyroscope that detects angular velocity by optical interference between counterclockwise light and clockwise light, the interferometric optical fiber gyroscope includes: a sensing coil mechanism including a multicore fiber that includes a plurality of transmission cores, and a multicore fiber optical path junction that optically couples at least a first transmission core and a second transmission core, of the plurality of transmission cores.

公开(公告)号：US20240372311A1

公开(公告)日：2024-11-07

申请号：US18573138

申请日：2022-06-24

Applicant: KINKI UNIVERSITY ,  OPTOQUEST CO., LTD.

Inventor： Minoru YOSHIDA ,  Yuichi TAKUSHIMA ,  Shota SEKIGUCHI ,  Yoshiharu SUZUKI ,  Tadashi HAJIKANO ,  Xiaomin WANG

IPC: H01S3/10 ,  G02B27/28 ,  G02F1/383 ,  H01S3/067 ,  H01S3/108

Abstract: An optical fiber output light source device includes an optical path that is obtained by joining a polarization maintaining amplifying optical fiber to a polarization maintaining dispersion compensating fiber, a single-polarization reflective polarizing beam splitter that is joined to one end of the optical path, a 90° polarization-rotating reflector that is joined to the other end of the optical path, a multiplexer that is inserted in the optical path, and a pumping light source that is joined to the multiplexer. An axis roll connection portion is provided in which a polarization axis of light returned from the single-polarization reflective polarizing beam splitter to the optical path is connected to a polarization maintaining axis of the optical path with a twisting angle therebetween at a predetermined angle.