Patents by Inventor Na-Eun KWACK

Na-Eun KWACK 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).

  • Ultra-low-loss optical fiber, and method and apparatus for producing same
    Patent number: 9726815
    Abstract: This ultra-low-loss optical fiber comprises a core having a higher relative refractive index difference than silica and a cladding having a lower relative refractive index difference than silica. The relative refractive index difference of the core with respect to the refractive index of silica is 0.0030 to 0.0055, for example, and the relative refractive index difference of the cladding with respect to the refractive index of silica is ?0.0020 to ?0.0003. The ultra-low-loss optical fiber has the loss characteristic of simultaneously having optical losses of at most 0.324 dB/km at a wavelength of 1310 nm, at most 0.320 dB/km at a wavelength of 1383 nm, at most 0.184 dB/km at a wavelength of 1550 nm, and at most 0.20 dB/km at a wavelength of 1625 nm. The ultra-low-loss optical fiber is supercooled when the surface temperature of the optical fiber has a temperature range in a glass transition section during drawing.
    Type: Grant
    Filed: December 26, 2014
    Date of Patent: August 8, 2017
    Assignee: TAIHAN FIBEROPTICS CO., LTD.
    Inventors: Chi-Hwan Ouh, Sung-Koog Oh, Na-Eun Kwack, Eun-You Hong, Jong-Gil Park, Ji-Hun Yun
  • ULTRA-LOW-LOSS OPTICAL FIBER, AND METHOD AND APPARATUS FOR PRODUCING SAME
    Publication number: 20170003444
    Abstract: This ultra-low-loss optical fiber comprises a core having a higher relative refractive index difference than silica and a cladding having a lower relative refractive index difference than silica. The relative refractive index difference of the core with respect to the refractive index of silica is 0.0030 to 0.0055, for example, and the relative refractive index difference of the cladding with respect to the refractive index of silica is ?0.0020 to ?0.0003. The ultra-low-loss optical fiber has the loss characteristic of simultaneously having optical losses of at most 0.324 dB/km at a wavelength of 1310 nm, at most 0.320 dB/km at a wavelength of 1383 nm, at most 0.184 dB/km at a wavelength of 1550 nm, and at most 0.20 dB/km at a wavelength of 1625 nm. The ultra-low-loss optical fiber is supercooled when the surface temperature of the optical fiber has a temperature range in a glass transition section during drawing.
    Type: Application
    Filed: December 26, 2014
    Publication date: January 5, 2017
    Inventors: Chi-Hwan OUH, Sung-Koog OH, Na-Eun KWACK, Eun-You HONG, Jong-Gil PARK, Ji-Hun YUN