Patents by Inventor Ki-Hong Yoon

Ki-Hong Yoon 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: 20200388989
    Abstract: According to an embodiment, a wavelength tunable laser comprising a gain region and a wavelength tunable area is disclosed. The wavelength tunable area comprises: a lower clad layer; a passive optical waveguide positioned on the lower clad layer; an upper clad layer positioned on the passive optical waveguide; a drive electrode positioned on the upper clad layer; a current blocking layer positioned on the drive electrode; a heater positioned on the current blocking layer; and a first insulating groove and a second insulating groove which are positioned so as to face each other with the passive optical waveguide therebetween.
    Type: Application
    Filed: November 28, 2017
    Publication date: December 10, 2020
    Applicant: OE SOLUTIONS CO., LTD.
    Inventor: Ki Hong YOON
  • Patent number: 9407061
    Abstract: Provided herein is an external-cavity type wavelength tunable laser including gain medium configured to generate an optical signal and amplify the generated optical signal based on a bias current applied; an external reflector configured to be coupled optically with the gain medium; a second thermistor provided on the side of the gain medium and configured to measure a temperature of the gain medium; a first thermistor provided on the external reflector and configured to measure a temperature of the external reflector; and a thermoelectric cooler configured to transfer generated heat based on the temperatures measured by the first and second thermistors.
    Type: Grant
    Filed: July 17, 2015
    Date of Patent: August 2, 2016
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Byung Seok Choi, Ki Hong Yoon
  • Patent number: 9343614
    Abstract: Provided are a high-speed superluminescent diode, a method of manufacturing the same, and a wavelength-tunable external cavity laser including the same. The superluminescent diode includes a substrate having an active region and an optical mode size conversion region, waveguides including an ridge waveguide in the active region and a deep ridge waveguide in the optical mode size conversion region connected to the active waveguide, an electrode disposed on the ridge waveguide; planarizing layers disposed on sides of the ridge waveguide and the deep ridge waveguide on the substrate, and a pad electrically connected to the electrode, the pad being disposed on the planarizing layers outside the active waveguide.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: May 17, 2016
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Su Hwan Oh, Ki-Hong Yoon, Kisoo Kim, O-Kyun Kwon, Oh Kee Kwon, Byung-Seok Choi, Jongbae Kim
  • Publication number: 20160020575
    Abstract: Provided herein is an external-cavity type wavelength tunable laser including gain medium configured to generate an optical signal and amplify the generated optical signal based on a bias current applied; an external reflector configured to be coupled optically with the gain medium; a second thermistor provided on the side of the gain medium and configured to measure a temperature of the gain medium; a first thermistor provided on the external reflector and configured to measure a temperature of the external reflector; and a thermoelectric cooler configured to transfer generated heat based on the temperatures measured by the first and second thermistors.
    Type: Application
    Filed: July 17, 2015
    Publication date: January 21, 2016
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Byung Seok CHOI, Ki Hong YOON
  • Publication number: 20150288143
    Abstract: Provided herein is a tunable external cavity laser comprising: a gain medium configured to create an optical signal; an external reflector configured to be coupled to the gain medium, and to comprise a Bragg grating; and a phase control section configured to adjust a phase of an entire laser, but to adjust a wavelength of the laser to a longer wavelength than a peak reflectivity of the external reflector.
    Type: Application
    Filed: April 1, 2015
    Publication date: October 8, 2015
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Byung Seok CHOI, O Kyun KWON, Ki Soo KIM, Jong Sool JEONG, Su Hwan OH, Ki Hong YOON
  • Patent number: 9099839
    Abstract: Disclosed is a wavelength tunable laser apparatus, including: a first substrate configured to reflect inflow laser light, and tune a wavelength of the reflected laser light; and a second substrate configured to adjust a gain of the laser light input from the first substrate, reflect a specific wavelength of the laser light, and adjust a phase of oscillated laser light, in which the first substrate and the second substrate are formed in a single package form.
    Type: Grant
    Filed: September 5, 2014
    Date of Patent: August 4, 2015
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Ki Hong Yoon, Byung Seok Choi, O Kyun Kwon, Jong Sool Jeong, Ki Soo Kim
  • Publication number: 20150155428
    Abstract: Provided are a high-speed superluminescent diode, a method of manufacturing the same, and a wavelength-tunable external cavity laser including the same. The superluminescent diode includes a substrate having an active region and an optical mode size conversion region, waveguides including an ridge waveguide in the active region and a deep ridge waveguide in the optical mode size conversion region connected to the active waveguide, an electrode disposed on the ridge waveguide; planarizing layers disposed on sides of the ridge waveguide and the deep ridge waveguide on the substrate, and a pad electrically connected to the electrode, the pad being disposed on the planarizing layers outside the active waveguide.
    Type: Application
    Filed: February 6, 2015
    Publication date: June 4, 2015
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Su Hwan OH, Ki-Hong YOON, Kisoo KIM, O-Kyun KWON, Oh Kee KWON, Byung-Seok CHOI, Jongbae KIM
  • Patent number: 8995480
    Abstract: The present disclosure relates to a tunable laser module including a light gain area unit for outputting an optical signal; an optical distributor for separating the optical signal output from the light gain area unit; two comb reflection units for reflecting a part of optical signals separated by the optical distributor and allow a part of the optical signals to penetrate; two phase units for changing phases of the optical signals penetrating the two comb reflection units; an optical coupler for combining the optical signals of which the phases are changed by the two phase units; and an optical amplifier for amplifying the optical signal combined by the optical coupler, wherein the light gain area unit oscillates a laser by totally reflecting the optical signals reflected by the two comb reflection units.
    Type: Grant
    Filed: November 14, 2012
    Date of Patent: March 31, 2015
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Ki-Hong Yoon, O-Kyun Kwon, Su Hwan Oh, Kisoo Kim, Byung-seok Choi, Hyun Soo Kim
  • Patent number: 8989229
    Abstract: Provided are a high-speed superluminescent diode, a method of manufacturing the same, and a wavelength-tunable external cavity laser including the same. The superluminescent diode includes a substrate having an active region and an optical mode size conversion region, waveguides including an ridge waveguide in the active region and a deep ridge waveguide in the optical mode size conversion region connected to the active waveguide, an electrode disposed on the ridge waveguide; planarizing layers disposed on sides of the ridge waveguide and the deep ridge waveguide on the substrate, and a pad electrically connected to the electrode, the pad being disposed on the planarizing layers outside the active waveguide.
    Type: Grant
    Filed: June 1, 2012
    Date of Patent: March 24, 2015
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Su Hwan Oh, Ki-Hong Yoon, Kisoo Kim, O-Kyun Kwon, Oh Kee Kwon, Byung-seok Choi, Jongbae Kim
  • Patent number: 8902937
    Abstract: The present disclosure relates to a compact external cavity tunable laser apparatus. The laser apparatus includes a substrate, an external cavity tunable reflecting unit that reflects laser light entering from the outside on the substrate and selects and varies a wavelength of the reflected laser light, an optical fiber that outputs the laser light on the substrate; and an highly integrated light source that integrates the laser light input from the external cavity tunable reflecting unit using inclined input and output waveguides, a curved waveguide, and a straight waveguide to output the integrated laser light to the optical fiber in order to match an optical axis formed with the external cavity tunable reflecting unit with an optical axis formed with an optical fiber.
    Type: Grant
    Filed: March 21, 2013
    Date of Patent: December 2, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Ki-Hong Yoon, O-Kyun Kwon, Kisoo Kim, Byungseok Choi, Hyun Soo Kim, Su Hwan Oh
  • Publication number: 20140064306
    Abstract: The present disclosure relates to a compact external cavity tunable laser apparatus. The laser apparatus includes a substrate, an external cavity tunable reflecting unit that reflects laser light entering from the outside on the substrate and selects and varies a wavelength of the reflected laser light, an optical fiber that outputs the laser light on the substrate; and an highly integrated light source that integrates the laser light input from the external cavity tunable reflecting unit using inclined input and output waveguides, a curved waveguide, and a straight waveguide to output the integrated laser light to the optical fiber in order to match an optical axis formed with the external cavity tunable reflecting unit with an optical axis formed with an optical fiber.
    Type: Application
    Filed: March 21, 2013
    Publication date: March 6, 2014
    Inventors: Ki-Hong Yoon, O-Kyun Kwon, Kisoo Kim, Byungseok Choi, Hyun Soo Kim, Su Hwan Oh
  • Publication number: 20130243013
    Abstract: The present disclosure relates to a tunable laser module including a light gain area unit for outputting an optical signal; an optical distributor for separating the optical signal output from the light gain area unit; two comb reflection units for reflecting a part of optical signals separated by the optical distributor and allow a part of the optical signals to penetrate; two phase units for changing phases of the optical signals penetrating the two comb reflection units; an optical coupler for combining the optical signals of which the phases are changed by the two phase units; and an optical amplifier for amplifying the optical signal combined by the optical coupler, wherein the light gain area unit oscillates a laser by totally reflecting the optical signals reflected by the two comb reflection units.
    Type: Application
    Filed: November 14, 2012
    Publication date: September 19, 2013
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Ki-Hong YOON, O-Kyun Kwon, Su Hwan Oh, Kisoo Kim, Byung-seok Choi, Hyun Soo Kim
  • Patent number: 8422530
    Abstract: Provided is a laser module. The laser module comprises: a substrate; an gain unit oscillating a laser light on the substrate; an external resonance reflecting unit total-reflecting the laser light at an external of the substrate adjacent to one side of the gain unit; and an inner resonance reflecting unit reflecting the laser light to the external resonance reflecting unit at the substrate between the modulating unit and gain unit and outputting the laser light to the modulating unit.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: April 16, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventor: Ki-Hong Yoon
  • Patent number: 8363685
    Abstract: Provided is a wavelength tunable external cavity laser (laser beam) generating device. The wavelength tunable external cavity laser generating devices includes: an optical amplifier, a comb reflector, and an optical signal processor connected in series on a first substrate; and an external wavelength tunable reflector disposed on a second substrate adjacent to the first substrate and connected to the optical amplifier, wherein the comb reflector includes: a waveguide disposed on the first substrate; a first diffraction grating disposed at one end of the waveguide adjacent to the optical amplifier; and a second diffraction grating disposed at the other end of the waveguide adjacent to the optical signal processor, wherein the optical amplifier, the comb reflector, and the optical signal processor constitute a continuous waveguide.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: January 29, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Hyun Soo Kim, Ki-Hong Yoon, Kisoo Kim, Byung-Seok Choi, O-Kyun Kwon
  • Publication number: 20120307857
    Abstract: Provided are a high-speed superluminescent diode, a method of manufacturing the same, and a wavelength-tunable external cavity laser including the same. The superluminescent diode includes a substrate having an active region and an optical mode size conversion region, waveguides including an ridge waveguide in the active region and a deep ridge waveguide in the optical mode size conversion region connected to the active waveguide, an electrode disposed on the ridge waveguide; planarizing layers disposed on sides of the ridge waveguide and the deep ridge waveguide on the substrate, and a pad electrically connected to the electrode, the pad being disposed on the planarizing layers outside the active waveguide.
    Type: Application
    Filed: June 1, 2012
    Publication date: December 6, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Su Hwan Oh, Ki-Hong Yoon, Kisoo Kim, O-Kyun Kwon, Oh Kee Kwon, Byung-Seok Choi, Jongbae Kim
  • Publication number: 20120281723
    Abstract: Provided is a wavelength-tunable external cavity laser. The wavelength-tunable external cavity laser includes a housing, a planar lightwave circuit (PLC) device disposed within the housing, a pump light source disposed at a side of the PLC device within the housing, and a modulation part disposed at the other side of the PLC device facing the pump light source within the housing.
    Type: Application
    Filed: May 1, 2012
    Publication date: November 8, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Su Hwan OH, Ki-Hong Yoon, Kisoo Kim
  • Publication number: 20120106578
    Abstract: A wavelength-tunable external cavity laser generating device is provided. The wavelength-tunable external cavity laser generating device includes a reflection-type multi-mode interferometer, an optical amplifier disposed between the reflection-type multi-mode interferometer and an external wavelength-tunable reflector to amplify light, and an optical signal processor configured to process light from the reflection-type multi-mode interferometer. The reflection-type multi-mode interferometer includes a multi-mode waveguide, an input waveguide connecting the optical amplifier and one end of the multi-mode waveguide, and an output waveguide configured to connect the optical signal processor and the other end of the multi-mode waveguide.
    Type: Application
    Filed: September 23, 2011
    Publication date: May 3, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Hyun Soo KIM, Jong Sool Jeong, Ki-Hong Yoon, Kisoo Kim, O-Kyun Kwon
  • Publication number: 20120093178
    Abstract: Provided is a wavelength tunable external cavity laser generating device. The wavelength tunable external cavity laser generating devices includes: an optical amplifier, a comb reflector, and an optical signal processor connected in series on a first substrate; and an external wavelength tunable reflector disposed on a second substrate adjacent to the first substrate and connected to the optical amplifier, wherein the comb reflector includes: a waveguide disposed on the first substrate; a first diffraction grating disposed at one end of the waveguide adjacent to the optical amplifier; and a second diffraction grating disposed at the other end of the waveguide adjacent to the optical signal processor, wherein the optical amplifier, the comb reflector, and the optical signal processor constitute a continuous waveguide.
    Type: Application
    Filed: January 28, 2011
    Publication date: April 19, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Hyun Soo KIM, Ki-Hong YOON, Kisoo KIM, Byung-Seok CHOI, O-Kyun Kwon
  • Publication number: 20110310918
    Abstract: Provided is a laser module. The laser module comprises: a substrate; an gain unit oscillating a laser light on the substrate; an external resonance reflecting unit total-reflecting the laser light at an external of the substrate adjacent to one side of the gain unit; and an inner resonance reflecting unit reflecting the laser light to the external resonance reflecting unit at the substrate between the modulating unit and gain unit and outputting the laser light to the modulating unit.
    Type: Application
    Filed: December 7, 2010
    Publication date: December 22, 2011
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventor: Ki-Hong YOON
  • Patent number: 7782909
    Abstract: Provided is a frequency-tunable terahertz light source device. The frequency-tunable terahertz light source device satisfies a Littrow diffraction condition at a wavelength and simultaneously satisfies a Littman-Metcalf diffraction condition at another wavelength using a double diffraction grating having two grating periods. Thus, oscillations simultaneously occur at the two different wavelengths, such that a terahertz wave can be stably generated by beating of the two oscillation wavelengths. In addition, the frequency-tunable terahertz light source device can readily change a frequency up to several terahertz and can be fabricated in a small size.
    Type: Grant
    Filed: August 15, 2008
    Date of Patent: August 24, 2010
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Kwang Ryong Oh, Jong Hoi Kim, Dong Churl Kim, Oh Kee Kwon, Ki Soo Kim, Ki Hong Yoon