Patents by Inventor Hyun Jay Kang

Hyun Jay Kang 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).

  • Device and method for free space coherent optical communication by means of automatic compensation for phase noise in atmosphere using femtosecond laser optical comb
    Patent number: 10425155
    Abstract: Provided are a device and method for free space coherent optical communications by means of an automatic compensation for phase noise in atmosphere using a femtosecond laser optical comb, and more particularly, a device and method for free space coherent optical communications by means of an automatic compensation for phase noise in atmosphere using a femtosecond laser optical comb, in which a phase shift value due to atmospheric turbulence is obtained from reflected light of transmission light generated from a femtosecond laser optical comb and the transmission light is pre-distorted on the basis of the phase shift value, thereby pre-compensating, in a transmission end, for phase noise due to atmospheric turbulence.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: September 24, 2019
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Seung-Woo Kim, Young-Jin Kim, Byung Jae Chun, Hyun Jay Kang
  • Device and method for performing overall frequency stabilization of femtosecond laser optical comb by using optical modes directly extracted from optical comb
    Patent number: 10141713
    Abstract: The present invention relates to a device and a method for performing overall frequency stabilization of a femtosecond laser optical comb by using optical modes directly extracted from the optical comb, and more particularly, to a device and a method for performing overall frequency stabilization of a femtosecond laser optical comb by using optical modes directly extracted from the optical comb capable of stabilizing an overall range of frequencies of the femtosecond laser optical comb by using optical modes directly extracted from the optical comb and generating a cw laser and pulse having an excellent frequency stability and linewidth from the stabilized optical comb.
    Type: Grant
    Filed: August 19, 2015
    Date of Patent: November 27, 2018
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Seung-Woo Kim, Young-Jin Kim, Byung Jae Chun, Heesuk Jang, Hyun Jay Kang
  • Device and Method for Performing Overall Frequency Stabilization of Femtosecond Laser Optical Comb by Using Optical Modes Directly Extracted from Optical Comb
    Publication number: 20180212396
    Abstract: The present invention relates to a device and a method for performing overall frequency stabilization of a femtosecond laser optical comb by using optical modes directly extracted from the optical comb, and more particularly, to a device and a method for performing overall frequency stabilization of a femtosecond laser optical comb by using optical modes directly extracted from the optical comb capable of stabilizing an overall range of frequencies of the femtosecond laser optical comb by using optical modes directly extracted from the optical comb and generating a cw laser and pulse having an excellent frequency stability and linewidth from the stabilized optical comb.
    Type: Application
    Filed: August 19, 2015
    Publication date: July 26, 2018
    Inventors: Seung-Woo Kim, Young-Jin Kim, Byung Jae Chun, Heesuk Jang, Hyun Jay Kang
  • Device and Method for Free Space Coherent Optical Communication by Means of Automatic Compensation for Phase Noise in Atmosphere Using Femtosecond Laser Optical Comb
    Publication number: 20180212676
    Abstract: Provided are a device and method for free space coherent optical communications by means of an automatic compensation for phase noise in atmosphere using a femtosecond laser optical comb, and more particularly, a device and method for free space coherent optical communications by means of an automatic compensation for phase noise in atmosphere using a femtosecond laser optical comb, in which a phase shift value due to atmospheric turbulence is obtained from reflected light of transmission light generated from a femtosecond laser optical comb and the transmission light is pre-distorted on the basis of the phase shift value, thereby pre-compensating, in a transmission end, for phase noise due to atmospheric turbulence.
    Type: Application
    Filed: August 21, 2015
    Publication date: July 26, 2018
    Inventors: Seung-Woo Kim, Young-Jin Kim, Byung Jae Chun, Hyun Jay Kang