Patents by Inventor Seunghwan Kong

Seunghwan Kong 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).

  • Apparatus for stabilizing second harmonic pulse output in a laser system operating by pulses
    Patent number: 8761214
    Abstract: The present invention relates to an apparatus for stabilizing second harmonic wave pulse output in a laser system operating by pulses. The apparatus of the present invention comprises: a pulse laser oscillating unit (110) which outputs a laser pulse; a nonlinear crystal (120) which converts the laser pulse of a first wavelength output by the pulse laser oscillation unit (110) into a second harmonic wave with a value that is half of the first wavelength, and outputs the converted second harmonic wave; and an optical absorption filter (130) which absorbs a portion of the energy of the converted second harmonic laser pulse from the nonlinear crystal (120) to output the second harmonic wave with a lower energy. The thus-configured apparatus of the present invention supplies a fundamental wave in a stable state and having a small PTP value and high level energy to the nonlinear crystal, in order to obtain the second harmonic wave which is in a more stable state and has a small PTP value and a variety of energies.
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: June 24, 2014
    Assignee: Lutronic Corporation
    Inventors: Haelyung Hwang, Seunghwan Kong, Huicheol Lee
  • APPARATUS FOR STABILIZING SECOND HARMONIC PULSE OUTPUT IN A LASER SYSTEM OPERATING BY PULSES
    Publication number: 20120044963
    Abstract: The present invention relates to an apparatus for stabilizing second harmonic wave pulse output in a laser system operating by pulses. The apparatus of the present invention comprises: a pulse laser oscillating unit (110) which outputs a laser pulse; a nonlinear crystal (120) which converts the laser pulse of a first wavelength output by the pulse laser oscillation unit (110) into a second harmonic wave with a value that is half of the first wavelength, and outputs the converted second harmonic wave; and an optical absorption filter (130) which absorbs a portion of the energy of the converted second harmonic laser pulse from the nonlinear crystal (120) to output the second harmonic wave with a lower energy. The thus-configured apparatus of the present invention supplies a fundamental wave in a stable state and having a small PTP value and high level energy to the nonlinear crystal, in order to obtain the second harmonic wave which is in a more stable state and has a small PTP value and a variety of energies.
    Type: Application
    Filed: April 28, 2010
    Publication date: February 23, 2012
    Applicant: LUTRONIC CORPORATION
    Inventors: Haelyung Hwang, Seunghwan Kong, Huicheol Lee