Patents by Inventor Masaki Ohzeki

Masaki Ohzeki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for aligning multicore fiber, method for manufacturing multicore fiber connector, device for aligning multicore fiber, and multicore fiber fusion splicing machine
    Patent number: 11960120
    Abstract: A method for aligning multicore fiberS that has three or more cores disposed on a circumference centered on a central axis of a clad includes: capturing a first set of images of side surfaces of each of the pair of multicore fibers before and after rotating each of the pair of multicore fibers by P° a number of times (N) rounded up so that N=360/P; determining, for each of the pair of multicore fibers, a similarity between an image of the first set of images before a rotation by P° and an image of the first set of images after the rotation by P° for each of the N times the multicore fiber is rotated by P°; determining specific relative rotation positions of the pair of multicore fibers in which a cross-correlation becomes highest; and rotating at least one of the pair of multicore fibers.
    Type: Grant
    Filed: February 22, 2021
    Date of Patent: April 16, 2024
    Assignee: Fujikura Ltd.
    Inventors: Masaki Ohzeki, Katsuhiro Takenaga
  • MULTICORE FIBER, OPTICAL FIBER CABLE, AND OPTICAL CONNECTOR
    Publication number: 20230036200
    Abstract: A multicore fiber includes: a cladding; a center core at a center of the cladding; and seven or more outer cores disposed at rotationally asymmetric positions on a circumference centered at the center of the cladding. Angles formed by adjacent ones of lines connecting the center core and respective ones of the outer cores are all 60° or less.
    Type: Application
    Filed: December 16, 2020
    Publication date: February 2, 2023
    Applicant: Fujikura Ltd.
    Inventors: Katsuhiro Takenaga, Yusuke Sasaki, Masaki Ohzeki
  • MULTICORE FIBER, OPTICAL FIBER CABLE, AND OPTICAL CONNECTOR
    Publication number: 20230017442
    Abstract: A multicore fiber includes: a cladding; and three or more and five or less cores disposed at rotationally asymmetric positions on a circumference centered at a center of the cladding. No core is disposed at the center of the cladding. Angles formed by adjacent ones of lines connecting the center of the cladding and respective ones of the cores are all larger than 60°.
    Type: Application
    Filed: December 16, 2020
    Publication date: January 19, 2023
    Applicant: Fujikura Ltd.
    Inventors: Katsuhiro Takenaga, Yusuke Sasaki, Masaki Ohzeki
  • METHOD FOR ALIGNING MULTICORE FIBER, METHOD FOR MANUFACTURING MULTICORE FIBER CONNECTOR, DEVICE FOR ALIGNING MULTICORE FIBER, AND MULTICORE FIBER FUSION SPLICING MACHINE
    Publication number: 20220291452
    Abstract: A method for aligning multicore fiberS that has three or more cores disposed on a circumference centered on a central axis of a clad includes: capturing a first set of images of side surfaces of each of the pair of multicore fibers before and after rotating each of the pair of multicore fibers by P° a number of times (N) rounded up so that N=360/P; determining, for each of the pair of multicore fibers, a similarity between an image of the first set of images before a rotation by P° and an image of the first set of images after the rotation by P° for each of the N times the multicore fiber is rotated by P°; determining specific relative rotation positions of the pair of multicore fibers in which a cross-correlation becomes highest; and rotating at least one of the pair of multicore fibers.
    Type: Application
    Filed: February 22, 2021
    Publication date: September 15, 2022
    Applicant: FUJIKURA LTD.
    Inventors: Masaki Ohzeki, Katsuhiro Takenaga