Patents by Inventor Dea-Hwan Oh

Dea-Hwan Oh 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
    Publication number: 20150049999
    Abstract: An ultra-low loss optical fiber is provided. The ultra-low loss optical fiber includes a core having the maximum refractive index inside an optical fiber, and placed at the central portion of the optical fiber, a trench having the minimum refractive index inside the optical fiber and encompassing the core, and a cladding encompassing the trench. The core includes a first sub-core layer having the maximum refractive index inside the optical fiber, and placed at the center of the optical fiber, a second sub-core layer having a refractive index lower than that of the first sub-core layer and encompassing the first sub-core layer, and a third sub-core layer having a refractive index lower than that of the second sub-core layer and encompassing the second sub-core layer.
    Type: Application
    Filed: November 22, 2012
    Publication date: February 19, 2015
    Inventors: Yeong-Seop Lee, Mun-Hyun Do, Si-Ho Song, Dea-Hwan Oh, Dae-Seung Moon, Kyung-Hwan Oh
  • OPTICAL FIBER INCLUDING A PLURALITY OF SUB-CORE AREAS
    Publication number: 20140376869
    Abstract: An optical fiber is provided. The optical fiber includes a core located at the center of the optical fiber and having a maximum refractive index in the optical fiber, and a cladding located at a circumference of the core and having a refractive index lower than that of the core. The core has a structure in which sub-core areas having the refractive index higher than those of adjacent sub-core areas and sub-core areas having the refractive index lower than those of adjacent sub-core areas are alternately repeated.
    Type: Application
    Filed: June 12, 2014
    Publication date: December 25, 2014
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Yeong-Seop LEE, Mun-Hyun DO, Dae-Seung MOON, Si-Ho SONG, Dea-Hwan OH, Tae-Hyung LEE
  • Low bend loss optical fiber
    Patent number: 8081854
    Abstract: Disclosed is a low bend loss optical fiber including: a core; an inner layer disposed at outside of the core, which has a refractive index lower than a refractive index of the core, the refractive index of the inner layer gradually decreasing as it becomes farther from the core; and a trench layer disposed at outside of the inner layer, which has a lowest refractive index.
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: December 20, 2011
    Assignees: SEHF-Korea Co., Ltd., Gwangju Institute of Science and Technology
    Inventors: Young-Sik Yoon, Yeong-Seop Lee, Jin-Han Kim, Won-Taek Han, Seong-Min Joo, Dea-Hwan Oh
  • LOW BEND LOSS OPTICAL FIBER
    Publication number: 20100158460
    Abstract: Disclosed is a low bend loss optical fiber including: a core; an inner layer disposed at outside of the core, which has a refractive index lower than a refractive index of the core, the refractive index of the inner layer gradually decreasing as it becomes farther from the core; and a trench layer disposed at outside of the inner layer, which has a lowest refractive index.
    Type: Application
    Filed: December 15, 2009
    Publication date: June 24, 2010
    Applicants: SEHF-Korea Co., Ltd., Gwangju Institute of Science and Technology
    Inventors: Young-Sik YOON, Yeong-Seop LEE, Jin-Han KIM, Won-Taek HAN, Seong-Min JU, Dea-Hwan OH