Patents by Inventor Han Seb Moon

Han Seb Moon 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).

  • Publication number: 20240297721
    Abstract: Disclosed are a robust polarization-entangled quantum source from an atomic ensemble and an implementation method. A robust polarization-entangled quantum source from an atomic ensemble according to an example embodiment includes an atomic vapor cell containing rubidium (87Rb) atoms, and a processor configured to generate a photon pair of a signal and an idler from the atomic vapor cell by traveling a coupling laser and a pump laser in opposite directions with respect to the atomic vapor cell.
    Type: Application
    Filed: December 31, 2021
    Publication date: September 5, 2024
    Inventors: Han-Seb MOON, Heon Oh KIM, Jiho PARK, Jinhyuk BAE
  • Publication number: 20240256937
    Abstract: The present disclosure relates to an apparatus and method of generating a multidimensional quantum state through space division multiplexing of a single photon. The multidimensional quantum state generation apparatus includes a photon generator configured to generate a single photon, and a multidimensional quantum state generator configured to generate a multidimensional quantum state by space division multiplexing a state of the single photon through phase modulation of a spatial light modulator (SLM).
    Type: Application
    Filed: November 3, 2023
    Publication date: August 1, 2024
    Inventors: Han-Seb MOON, Changhoon BAEK
  • Publication number: 20230412280
    Abstract: Disclosed are a quantum-entangled photon-pair light source using a chip-scale atomic ensemble and implementation method thereof. The quantum-entangled photon-pair light source may include an atomic vapor cell configured to generate cesium (Cs) vapor to fill a photon-pair chamber and a processor configured to cause a coupling laser and a pump laser to travel based on the photon-pair chamber and generate a photon pair of a signal and an idler from the atomic vapor cell.
    Type: Application
    Filed: June 9, 2023
    Publication date: December 21, 2023
    Inventors: Han-Seb Moon, Hee Woo Kim
  • Patent number: 11719530
    Abstract: A method and a system for generating independent coherent photons frequency-stabilized to transition of atoms for long-distance quantum communication are provided. The method for generating independent coherent photons frequency-stabilized to transition of atoms for long-distance quantum communication according to the present disclosure, includes generating a photon in a quantum state from a first quantum light source including an alkali atom or an ensemble of alkali atoms therein as a medium, further generating a photon in a quantum state from a second quantum light source spatially separated from the first quantum light source, including the same medium as that of the first quantum light source therein, and oscillating a photon pair obtained by coupling the photons generated by the first and second quantum light sources as a continuous wave coherent photon (CWCP) for quantum communication.
    Type: Grant
    Filed: January 10, 2022
    Date of Patent: August 8, 2023
    Assignee: PUSAN NATIONAL UNIVERSITY INDUSTRY-UNIVERSITY COOPERATION FOUNDATION
    Inventors: Han Seb Moon, Heon Oh Kim, Dan Bi Kim
  • Publication number: 20220260358
    Abstract: A method and a system for generating independent coherent photons frequency-stabilized to transition of atoms for long-distance quantum communication are provided. The method for generating independent coherent photons frequency-stabilized to transition of atoms for long-distance quantum communication according to the present disclosure, includes generating a photon in a quantum state from a first quantum light source including an alkali atom or an ensemble of alkali atoms therein as a medium, further generating a photon in a quantum state from a second quantum light source spatially separated from the first quantum light source, including the same medium as that of the first quantum light source therein, and oscillating a photon pair obtained by coupling the photons generated by the first and second quantum light sources as a continuous wave coherent photon (CWCP) for quantum communication.
    Type: Application
    Filed: January 10, 2022
    Publication date: August 18, 2022
    Inventors: Han Seb MOON, Heon Oh KIM, Dan Bi KIM
  • Patent number: 11287369
    Abstract: A method is disclosed for increasing an intensity of a signal detected in a spectroscopy device using a vapor cell and a spectroscopy device using the same. An operation method of the spectroscopy device may include: causing a first light for exciting an atom trapped in a vapor cell in a first hyperfine ground state to a first excited state to be incident on the vapor cell; causing a second light for exciting an atom trapped in the vapor cell in a second hyperfine ground state to a second excited state to be incident on the vapor cell; causing a third light for exciting the atom in the second excited state to a third excited state to be incident on the vapor cell; and detecting fluorescence which is emitted while the atom in the third excited state returns to the ground state.
    Type: Grant
    Filed: November 24, 2020
    Date of Patent: March 29, 2022
    Assignee: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE
    Inventors: Taek Jeong, Han Seb Moon, Dai Hyuk Yu, Jae Hoon Lee, Hyun Gue Hong
  • Publication number: 20210156794
    Abstract: A method is disclosed for increasing an intensity of a signal detected in a spectroscopy device using a vapor cell and a spectroscopy device using the same. An operation method of the spectroscopy device may include: causing a first light for exciting an atom trapped in a vapor cell in a first hyperfine ground state to a first excited state to be incident on the vapor cell; causing a second light for exciting an atom trapped in the vapor cell in a second hyperfine ground state to a second excited state to be incident on the vapor cell; causing a third light for exciting the atom in the second excited state to a third excited state to be incident on the vapor cell; and detecting fluorescence which is emitted while the atom in the third excited state returns to the ground state.
    Type: Application
    Filed: November 24, 2020
    Publication date: May 27, 2021
    Inventors: Taek Jeong, Han Seb Moon, Dai Hyuk Yu, Jae Hoon Lee, Hyun Gue Hong
  • Patent number: 7953131
    Abstract: The present invention relates to an optical frequency synthesizer and an optical frequency synthesizing method using femtosecond laser optical injection locking, which inject a femtosecond laser optical frequency comb into a diode laser, thus obtaining single-mode laser light, phase-locked to only a single mode in the optical frequency comb, and which change the optical frequency and interval, that is, the repetition rate, of a femtosecond laser, together with the frequency of a semiconductor laser, thus scanning optical frequencies while realizing a single desired optical frequency. The optical frequency synthesizer using femtosecond laser optical injection locking, includes a mode-locked femtosecond laser (110), which is a master laser, and a diode laser (120), which is a slave laser and into which laser light emitted from the femtosecond laser is injected.
    Type: Grant
    Filed: April 9, 2009
    Date of Patent: May 31, 2011
    Assignee: Korea Research Institute of Standards and Science
    Inventors: Sang Eon Park, Han Seb Moon, Eok Bong Kim, Chang Young Park, Taeg Yong Kwon
  • Patent number: 7653316
    Abstract: Provided is a fiber ring laser capable of obtaining a back-up laser light and standard light having a wavelength continuously tuned in a single mode with equal spacing of 12.5 GHz, 25 GHz, 50 GHz or 100 GHz recommended by ITU-T Recommendation G. 692 & G. 694.1 in a C-band and an L-band using a fiber tunable etalon filter, an air gap etalon filter and a saturable absorber in an optical fiber laser resonator having a serial ring shape using a C-band optical amplifier and an L-band optical amplifier. The fiber ring laser can generate laser light having a wavelength tuned by more than 70 nm, excellent output power flatness and a source spontaneous emission ratio of more than 70 dB in 361 channels with equal spacing of 25 GHz by applying a bias voltage to a voltage-operated piezoelectric element of a tunable etalon filter. A single longitudinal mode operation of the fiber ring laser can be obtained by using a saturable absorber serving as a narrow-bandwidth filter.
    Type: Grant
    Filed: May 18, 2006
    Date of Patent: January 26, 2010
    Assignee: Korea Research Institute of Standard And Science
    Inventors: Ho Suhng Suh, Han Seb Moon, Won Kyu Lee, Han Young Ryu, Seon Mo Kang
  • Publication number: 20090225795
    Abstract: The present invention relates to an optical frequency synthesizer and an optical frequency synthesizing method using femtosecond laser optical injection locking, which inject a femtosecond laser optical frequency comb into a diode laser, thus obtaining single-mode laser light, phase-locked to only a single mode in the optical frequency comb, and which change the optical frequency and interval, that is, the repetition rate, of a femtosecond laser, together with the frequency of a semiconductor laser, thus scanning optical frequencies while realizing a single desired optical frequency. The optical frequency synthesizer using femtosecond laser optical injection locking, includes a mode-locked femtosecond laser (110), which is a master laser, and a diode laser (120), which is a slave laser and into which laser light emitted from the femtosecond laser is injected.
    Type: Application
    Filed: April 9, 2009
    Publication date: September 10, 2009
    Applicant: Korea Research Institute of Standards and Science
    Inventors: Sang Eon Park, Han Seb Moon, Eok Bong Kim, Chang Young Park, Taeg Yong Kwon