Patents by Inventor Changkun YAN

Changkun YAN 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).

  • Low-dispersion single-mode optical fiber
    Patent number: 11550098
    Abstract: A low-dispersion single-mode fiber includes a core and claddings covering the core. The core layer has a radius in a range of 3-5 ?m and a relative refractive index difference in a range of 0.15% to 0.45%. The claddings comprise a first depressed cladding, a raised cladding, a second depressed cladding, and an outer cladding arranged sequentially from inside to outside. The first depressed cladding has a unilateral width in a range of 2-7 ?m and a relative refractive index difference in a range of ?0.4% to 0.03%. The raised cladding has a unilateral width in a range of 2-7 ?m and a relative refractive index difference in a range of 0.05% to 0.20%. The second depressed cladding has a unilateral width in a range of 0-8 ?m and a relative refractive index difference in a range of 0% to ?0.2%. The outer cladding is formed of pure silicon dioxide glass.
    Type: Grant
    Filed: October 20, 2020
    Date of Patent: January 10, 2023
    Assignee: YANGTZE OPTICAL FIBRE AND CABLE JOINT STOCK LIMITED COMPANY
    Inventors: Changkun Yan, Wufeng Xiao, Runhan Wang, Tiejun Wang, Beibei Cao, Ming Cheng
  • LOW-DISPERSION SINGLE-MODE OPTICAL FIBER
    Publication number: 20220050244
    Abstract: A low-dispersion single-mode fiber includes a core and claddings covering the core. The core layer has a radius in a range of 3-5 ?m and a relative refractive index difference in a range of 0.15% to 0.45%. The claddings comprise a first depressed cladding, a raised cladding, a second depressed cladding, and an outer cladding arranged sequentially from inside to outside. The first depressed cladding has a unilateral width in a range of 2-7 ?m and a relative refractive index difference in a range of ?0.4% to 0.03%. The raised cladding has a unilateral width in a range of 2-7 ?m and a relative refractive index difference in a range of 0.05% to 0.20%. The second depressed cladding has a unilateral width in a range of 0-8 ?m and a relative refractive index difference in a range of 0% to ?0.2%. The outer cladding is formed of pure silicon dioxide glass.
    Type: Application
    Filed: October 20, 2020
    Publication date: February 17, 2022
    Inventors: Changkun YAN, Wufeng XIAO, Runhan WANG, Tiejun WANG, Beibei CAO, Ming CHENG