Patents by Inventor Fanghai Zhang

Fanghai Zhang 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).

  • Multi-mode bending-resistant fiber and production method thereof
    Patent number: 8184936
    Abstract: A multimode fiber including a core and a cladding. The core has a radius (R1) of 24-26 ?m, the refractive index profile thereof is a parabola, and the maximum relative refractive index difference (?1) is 0.9-1.1%. The cladding surrounds the core and includes from inside to outside an inner cladding, a middle cladding, and an outer cladding; a radius (R2) of the inner cladding is 1.04-1.6 times that of the core, and a relative refractive index difference (?2) thereof is ?0.01-0.01%; the middle cladding is a graded refractive index cladding whose radius (R3) is 1.06-1.8 times that of the core, and a relative refractive index difference thereof is decreased from ?2 to ?4; and a radius (R4) of the outer cladding is 2.38-2.63 times that of the core, and a relative refractive index difference (?4) thereof is between ?0.20 and ?0.40%.
    Type: Grant
    Filed: July 19, 2010
    Date of Patent: May 22, 2012
    Assignee: Yangtze Optical Fibre and Cable Company, Ltd.
    Inventors: Fanghai Zhang, Beibei Cao, Qingrong Han, Raadjkoemar Matai
  • MULTI-MODE BENDING-RESISTANT FIBER AND PRODUCTION METHOD THEREOF
    Publication number: 20110044596
    Abstract: A multimode fiber including a core and a cladding. The core has a radius (R1) of 24-26 ?m, the refractive index profile thereof is a parabola, and the maximum relative refractive index difference (?1) is 0.9-1.1%. The cladding surrounds the core and includes from inside to outside an inner cladding, a middle cladding, and an outer cladding; a radius (R2) of the inner cladding is 1.04-1.6 times that of the core, and a relative refractive index difference (?2) thereof is ?0.01-0.01%; the middle cladding is a graded refractive index cladding whose radius (R3) is 1.06-1.8 times that of the core, and a relative refractive index difference thereof is decreased from ?2 to ?4; and a radius (R4) of the outer cladding is 2.38-2.63 times that of the core, and a relative refractive index difference (?4) thereof is between ?0.20 and ?0.40%.
    Type: Application
    Filed: July 19, 2010
    Publication date: February 24, 2011
    Inventors: Fanghai ZHANG, Beibei CAO, Qingrong HAN, Raadjkoemar Matai