Patents by Inventor Seongwoo Yoo

Seongwoo Yoo 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).

  • Patent number: 11163109
    Abstract: According to embodiments of the present invention, a fiber preform or an optical fiber is provided. The fiber preform or the optical fiber includes a core region having a plurality of cores, wherein two cores of the plurality of cores are bridged by an air gap, and a cladding arrangement including a first cladding region having a plurality of structures surrounding the core region, and a second cladding region in between the core region and the first cladding region, the second cladding region having a plurality of tubes, wherein at least one split is defined in the second cladding region. According to further embodiments of the present invention, a method for forming the fiber preform, a method for forming the optical fiber, an optical coupler having the optical fiber, an optical combiner having the optical fiber, and an optical apparatus having the optical fiber are also provided.
    Type: Grant
    Filed: June 20, 2018
    Date of Patent: November 2, 2021
    Assignee: Nanyang Technological University
    Inventors: Seongwoo Yoo, Xiaosheng Huang
  • Publication number: 20210080644
    Abstract: According to embodiments of the present invention, a fiber preform or an optical fiber is provided. The fiber preform or the optical fiber includes a core region having a plurality of cores, wherein two cores of the plurality of cores are bridged by an air gap, and a cladding arrangement including a first cladding region having a plurality of structures surrounding the core region, and a second cladding region in between the core region and the first cladding region, the second cladding region having a plurality of tubes, wherein at least one split is defined in the second cladding region. According to further embodiments of the present invention, a method for forming the fiber preform, a method for forming the optical fiber, an optical coupler having the optical fiber, an optical combiner having the optical fiber, and an optical apparatus having the optical fiber are also provided.
    Type: Application
    Filed: June 20, 2018
    Publication date: March 18, 2021
    Inventors: Seongwoo Yoo, Xiaosheng Huang
  • Publication number: 20200115270
    Abstract: According to embodiments of the present invention, a fiber preform or an optical fiber is provided. The fiber preform or the optical fiber includes a core region, and a cladding arrangement comprising a first cladding region comprising a plurality of rods entirely surrounding the core region, and a second cladding region in between the core region and the first cladding region, the second cladding region comprising a plurality of tubes, wherein a plurality of splits are defined in the second cladding region. According to further embodiments of the present invention, a method for forming a fiber preform and a method for forming an optical fiber are also provided.
    Type: Application
    Filed: March 2, 2018
    Publication date: April 16, 2020
    Inventors: Seongwoo Yoo, Xiaosheng Huang
  • Patent number: 10509154
    Abstract: According to embodiments of the present invention, a lighting apparatus is provided. The lighting apparatus includes at least one light source configured to provide a source light, an optical waveguide optically coupled to the at least one light source, the optical waveguide having at least one input region through which the source light enters the optical waveguide for propagation within the optical waveguide, and a plurality of light interacting structures arranged within the optical waveguide, the plurality of light interacting structures adapted to interact with the source light to provide an illumination light emitted from the optical waveguide to an ambient environment, wherein a concentration of the plurality of light interacting structures increases, along a length portion of the optical waveguide, in a direction away from the at least one input region.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: December 17, 2019
    Assignees: Nanyang Technological University, Technolite (Singapore) Pte Ltd
    Inventors: Swee Chuan Tjin, Seongwoo Yoo, Ho Meng @Tay Ho Meng Chia
  • Publication number: 20180329129
    Abstract: According to embodiments of the present invention, a lighting apparatus is provided. The lighting apparatus includes at least one light source configured to provide a source light, an optical waveguide optically coupled to the at least one light source, the optical waveguide having at least one input region through which the source light enters the optical waveguide for propagation within the optical waveguide, and a plurality of light interacting structures arranged within the optical waveguide, the plurality of light interacting structures adapted to interact with the source light to provide an illumination light emitted from the optical waveguide to an ambient environment, wherein a concentration of the plurality of light interacting structures increases, along a length portion of the optical waveguide, in a direction away from the at least one input region.
    Type: Application
    Filed: November 17, 2016
    Publication date: November 15, 2018
    Inventors: Swee Chuan Tjin, Seongwoo Yoo, Ho Meng @Tay Ho Meng Chia