Patents by Inventor Sang-Hwa Yoo

Sang-Hwa 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).

  • Wavelength-maintaining Fabry-Perot Laser Diode and optical transmitter including same
    Patent number: 9407062
    Abstract: A wavelength tracking Fabry-Perot Laser Diode (F-P LD), and an optical transmitter including the same are disclosed, the wavelength keepable F-P LD including a gain section configured to provide and modulate a gain using an injected first current; and a phase shift/modulation section configured to vary wavelength relative to oscillation mode of light advanced from the gain section by injected second current or voltage and to modulate phases.
    Type: Grant
    Filed: December 15, 2012
    Date of Patent: August 2, 2016
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Chang-Hee Lee, Joon-Young Kim, Sang-Rok Mun, Sang-Hwa Yoo, Byungil Seo, Myeonggyun Kye, Jian Chang
  • WAVELENGTH-MAINTAINING FABRY-PEROT LASER DIODE AND OPTICAL TRANSMITTER INCLUDING SAME
    Publication number: 20150288137
    Abstract: A wavelength tracking Fabry-Perot Laser Diode (F-P LD), and an optical transmitter including the same are disclosed, the wavelength keepable F-P LD including a gain section configured to provide and modulate a gain using an injected first current; and a phase shift/modulation section configured to vary wavelength relative to oscillation mode of light advanced from the gain section by injected second current or voltage and to modulate phases.
    Type: Application
    Filed: December 15, 2012
    Publication date: October 8, 2015
    Applicant: Korea Advanced Institute of Science and Technology
    Inventors: Chang-Hee Lee, Joon-Young Kim, Sang-Rok Mun, Sang-Hwa Yoo, Byungil Seo, Myeonggyun Kye, Jian Chang
  • APPARATUS FOR SUPPRESSING NOISE IN INJECTION-LOCKED LIGHT SOURCE AND WDM-PON SYSTEM PROVIDED WITH SAME
    Publication number: 20150093114
    Abstract: A WDM-PON system configured to perform an asymmetric wavelength division multiplexing and demultiplexing is proposed. A receiving end of WDM-PON system configured to receive a light transmitted from a transmission end including a first wavelength division multiplexer/demultiplexer includes a second wavelength division multiplexer/demultiplexer configured to demultiplex the light received rom the transmission end, where the second bandwidth of wavelength division multiplexer/demultiplexer is substantially greater than that of the first wavelength division multiplexer/demultiplexer.
    Type: Application
    Filed: January 18, 2012
    Publication date: April 2, 2015
    Applicant: Korea Advanced Institute of Science and Technology
    Inventors: Chang-Hee Lee, Sang-Rok Mun, Sang-Hwa Yoo, Joon-Young Kim, Myeonggyun Kye, Byungil Seo