Patents by Inventor Deok Ha Woo

Deok Ha Woo 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).

  • Patent number: 6624929
    Abstract: The present invention relates to the all-optical logic AND operation in a SOA (semiconductor optical amplifier)-based Mach-Zehnder interferometer. More particularly, it relates to the technology making feasible ultra high-speed logic operations while maintaining a small size and a low input power by utilizing a cross-phase modulation (XPM) wavelength converter composed of semiconductor optical amplifiers in the form of a Mach-Zehnder interferometer with nonlinear characteristics.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: September 23, 2003
    Assignee: Korea Institute of Science and Technology
    Inventors: Byung Kwon Kang, Jae Hun Kim, Seok Lee, Yoon Ho Park, Deok Ha Woo, Sun Ho Kim, Young Min Jhon
  • Publication number: 20030090784
    Abstract: The present invention relates to an implementation method of all-optical half adder by using semiconductor optical amplifier (SOA)-based devices and the apparatus thereof. In more detail, it relates to an implementation method of all-optical half adder comprising an all-optical XOR gate and an all-optical AND gate, implemented by using SOA-based devices, and an apparatus thereof.
    Type: Application
    Filed: July 9, 2002
    Publication date: May 15, 2003
    Inventors: Jae Hun Kim, Young Tae Byun, Young Min Jhon, Seok Lee, Deok Ha Woo, Sun Ho Kim
  • Publication number: 20030058528
    Abstract: The present invention is related to an all-optical OR device embodied by using the gain saturation and wavelength conversion characteristics of semiconductor optical amplifier (SOA), and more particularly, to a technique to embody an all-optical OR gate that performs all-optical logic operation by utilizing optical signals transmitted at arbitrary points of optical circuits such as optical computing circuits as the pump signal and the probe signal.
    Type: Application
    Filed: June 28, 2002
    Publication date: March 27, 2003
    Inventors: Young Tae Byun, Young Min Jhon, Jae Hun Kim, Seok Lee, Deok Ha Woo, Sun Ho Kim, Kwang Nam Kim
  • Publication number: 20030058527
    Abstract: The present invention relates to a method of embodying all-optical XOR logic gate by using semiconductor optical amplifier, and more particularly, to a technique to embody all-optical XOR logic gate utilizing the cross-gain modulation (XGM) characteristic of semiconductor optical amplifiers controllable with input currents, illumination signal, and pumping signal.
    Type: Application
    Filed: June 20, 2002
    Publication date: March 27, 2003
    Inventors: Jae Hun Kim, Young Tae Byun, Young Min Jhon, Seok Lee, Deok Ha Woo, Sun Ho Kim, Kwang Nam Kang
  • Publication number: 20020118441
    Abstract: The present invention relates to the all-optical logic AND operation in a SOA (semiconductor optical amplifier)-based Mach-Zehnder interferometer. More particularly, it relates to the technology making feasible ultra high-speed logic operations while maintaining a small size and a low input power by utilizing a cross-phase modulation (XPM) wavelength converter composed of semiconductor optical amplifiers in the form of a Mach-Zehnder interferometer with nonlinear characteristics.
    Type: Application
    Filed: August 31, 2001
    Publication date: August 29, 2002
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Byung Kwon Kang, Jae Hun Kim, Seok Lee, Yoon Ho Park, Deok Ha Woo, Sun Ho Kim, Young Min Jhon, Jong Han Song
  • Patent number: 6424438
    Abstract: An apparatus and method for realizing an all-optical NOR logic device includes a distributed feedback laser diode and a tunable laser diode respectively generating two pump signals of different wavelengths. The apparatus also includes a pulse generator and a Mach-Zehnder modulator modulating the pump signals. The apparatus also includes a delay line adapted to delay a pump signal that has been split from the modulated pump signals and that travels along one optical path, and a polarization controller and an optical attenuator adapted to control another pump signal that has been split from the modulated pump signals and that travels along another optical path, to have the same polarization and intensity as those of the pump signal passing through the delay line. An Er-doped amplifier amplifies the sum of the pump signals so that the amplified pump signal sum saturates a semiconductor optical amplifier.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: July 23, 2002
    Assignee: Korea Institute of Science and Technology
    Inventors: Young Tae Byun, Sang Hyuck Kim, Deok Ha Woo, Seok Lee, Dong Hwan Kim, Sun Ho Kim
  • Publication number: 20020075533
    Abstract: In order to have a wanted exposure pattern, a specific intensity of light should be irradiated for a certain time interval since the exposing degree of the photoresist depends on the intensity of the incident light. The intensity of the light emitted from a light source such as a conventional laser has the Gaussian distribution in space, and the Gaussian distribution is maintained after passing a conventional lens. And the uniform area is limited to a very narrow area since the exposure pattern is changed with the intensity distribution of the light incident to the photoresist.
    Type: Application
    Filed: August 31, 2001
    Publication date: June 20, 2002
    Applicant: KOREA INSTITUE OF SCIENCE AND TECHNOLOGY
    Inventors: Byung Kwon Kang, Seok Lee, Yoon Ho Park, Deok Ha Woo, Sun Ho Kim, Jeong Su Yang, Jong Han Song