Patents by Inventor Hyun-don Jung

Hyun-don Jung 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).

  • Method and device for measuring internal quantum efficiency of an optical element
    Patent number: 9945898
    Abstract: A method for measuring the efficiency of an optical element is disclosed.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: April 17, 2018
    Assignee: ETAMAX.CO., LTD
    Inventors: Jong-In Shim, Dong Pyo Han, Hyun Don Jung
  • METHOD AND DEVICE FOR MEASURING INTERNAL QUANTUM EFFICIENCY OF AN OPTICAL ELEMENT
    Publication number: 20150323463
    Abstract: A method for measuring the efficiency of an optical element is disclosed.
    Type: Application
    Filed: July 31, 2013
    Publication date: November 12, 2015
    Inventors: Jong-In SHIM, Dong Pyo HAN, Hyun Don JUNG
  • High-power semiconductor laser device
    Patent number: 5331657
    Abstract: A high-power semiconductor laser device includes a semiconductor substrate of a first type, a first clad layer of a first type formed on the semiconductor substrate, an active layer of a second type and a clad layer of a second type sequentially stacked on the center of the first clad layer, and a current-blocking layer formed on the first clad layer and covering the whole surface of the active and second clad layers. Thus, crystal growth of a mirror facet is performed along with the formation of the current-blocking layer, thereby decreasing the number of process steps. Also, a II-VI group compound semiconductor having excellent electrical and optical characteristics is employed both on the mirror facet and in the current-blocking layer, so that optical absorption is prevented, which thus enhances the reliability and realizes the high-power operation of the semiconductor laser device.
    Type: Grant
    Filed: December 22, 1992
    Date of Patent: July 19, 1994
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jae-soo Yoo, Hyun-don Jung