Patents by Inventor Su Hwan Oh

Su Hwan Oh 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: 20210135258
    Abstract: An apparatus for measuring average power of a fuel cell may include: a voltage measurement unit configured to sequentially measure forward voltages of unit cells including a fuel cell stack from a bottom cell to a top cell, and sequentially measure reverse voltages of the unit cells from the top cell to the bottom cell; a current measurement unit configured to measure a current of an output terminal of the fuel cell stack; and a control unit configured to control the voltage measurement unit to measure the reverse voltages based on a current measurement time point, after the voltage measurement unit measures the forward voltages, and calculate average power using the forward voltages, the reverse voltages and the measured current.
    Type: Application
    Filed: October 28, 2020
    Publication date: May 6, 2021
    Inventors: Jung-Hwan OH, Seulkirom KIM, Su-Hun YANG, Yeong-Geun YEO
  • Publication number: 20210131555
    Abstract: An electronic shift lever is provided and includes a housing which accommodates various components therein. A motor unit generates a driving force and a reduction unit is connected to the motor unit. The reduction unit is configured to increase the driving force generated from the motor unit. The motor unit and the reduction unit are accommodated inside the housing and are formed integrally with each other.
    Type: Application
    Filed: September 28, 2020
    Publication date: May 6, 2021
    Inventors: Jae Yu Ko, Ji Hwan Oh, Su Won Kim, Chan Woo Lee
  • Patent number: 10935817
    Abstract: An optical device according to the embodiment of the inventive concept includes a waveguide path including a light generation region, a wavelength variable region, and a light modulation region, a first light waveguide layer provided in the light generation region to generate light, a second light waveguide layer provided in the wavelength variable region and connected to the first light waveguide layer, a ring-shaped third light waveguide layer provided in the light modulation region and connected to the second light waveguide layer, and first and second light modulation electrodes spaced apart from each other with the light modulation region therebetween. Here, the first light modulation electrode, the third light waveguide layer, and the second light modulation electrode vertically overlap each other.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: March 2, 2021
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Oh Kee Kwon, Kisoo Kim, Su Hwan Oh, Chul-Wook Lee
  • Patent number: 10931083
    Abstract: An optical apparatus includes a cooling device with a lower clad disposed thereon; a waveguide disposed on the lower clad and including an active waveguide to define a gain section and a passive waveguide to define a wavelength-tunable section; gratings disposed in the lower clad of the wavelength-tunable section; an upper clad disposed on the waveguide; a first upper electrode disposed on the upper clad of the gain section; and a second upper electrode disposed on the upper clad of the wavelength-tunable section. The lower clad of the wavelength-tunable section has a recess region to expose an upper surface of the cooling device, the recess region forming an air gap-having a height of 10 ?m to 80 ?m from the upper surface of the cooling device. The gratings are formed in a depth of at least 5 ?m from a bottom surface of the lower clad of the recess region.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: February 23, 2021
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Oh Kee Kwon, Su Hwan Oh, Chul-Wook Lee, Kisoo Kim
  • Publication number: 20200103678
    Abstract: An optical device according to the embodiment of the inventive concept includes a waveguide path including a light generation region, a wavelength variable region, and a light modulation region, a first light waveguide layer provided in the light generation region to generate light, a second light waveguide layer provided in the wavelength variable region and connected to the first light waveguide layer, a ring-shaped third light waveguide layer provided in the light modulation region and connected to the second light waveguide layer, and first and second light modulation electrodes spaced apart from each other with the light modulation region therebetween. Here, the first light modulation electrode, the third light waveguide layer, and the second light modulation electrode vertically overlap each other.
    Type: Application
    Filed: September 26, 2019
    Publication date: April 2, 2020
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Oh Kee KWON, Kisoo KIM, Su Hwan OH, Chul-Wook LEE
  • Publication number: 20200028324
    Abstract: Provided are an optical apparatus, a manufacturing method of a distributed Bragg reflector laser diode, and a manufacturing method of the optical apparatus, the an optical apparatus including a cooling device, a distributed Bragg reflector laser diode having a lower clad including a recess region on one side of the cooling device and connected to another side of the cooling device, and an air gap between the cooling device and the distributed Bragg reflector laser diode, wherein the air gap is defined by a bottom surface of the lower clad in the recess region and a top surface of the cooling device.
    Type: Application
    Filed: September 27, 2019
    Publication date: January 23, 2020
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Oh Kee KWON, Su Hwan OH, Chul-Wook LEE, Kisoo KIM
  • Patent number: 10476232
    Abstract: Provided are an optical apparatus, a manufacturing method of a distributed Bragg reflector laser diode, and a manufacturing method of the optical apparatus, the an optical apparatus including a cooling device, a distributed Bragg reflector laser diode having a lower clad including a recess region on one side of the cooling device and connected to another side of the cooling device, and an air gap between the cooling device and the distributed Bragg reflector laser diode, wherein the air gap is defined by a bottom surface of the lower clad in the recess region and a top surface of the cooling device.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: November 12, 2019
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: OH Kee Kwon, Su Hwan Oh, Chul-Wook Lee, Kisoo Kim
  • Patent number: 10148067
    Abstract: Provided is a distributed Bragg reflector tunable laser diode including a substrate provided with a gain section having an active waveguide from which a gain of laser light is obtained and a distributed reflector section having a passive waveguide connected to the active waveguide, wherein the distributed reflector section includes gratings disposed on or under the passive waveguide, a current injection electrode disposed on the passive waveguide and configured to provide a current into the passive waveguide to electrically tune a wavelength of the laser light, and a heater electrode disposed on the current injection electrode and configured to heat the passive waveguide to thermally tune the wavelength of the laser light, wherein the gratings, the current injection electrode, and the heater electrode vertically overlap each other.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: December 4, 2018
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Oh Kee Kwon, Chul-Wook Lee, Su Hwan Oh, Kisoo Kim
  • Publication number: 20180205199
    Abstract: Provided are an optical apparatus, a manufacturing method of a distributed Bragg reflector laser diode, and a manufacturing method of the optical apparatus, the an optical apparatus including a cooling device, a distributed Bragg reflector laser diode having a lower clad including a recess region on one side of the cooling device and connected to another side of the cooling device, and an air gap between the cooling device and the distributed Bragg reflector laser diode, wherein the air gap is defined by a bottom surface of the lower clad in the recess region and a top surface of the cooling device
    Type: Application
    Filed: September 12, 2017
    Publication date: July 19, 2018
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Oh Kee KWON, Su Hwan OH, Chul-Wook LEE, Kisoo KIM
  • Publication number: 20180205200
    Abstract: Provided is a distributed Bragg reflector tunable laser diode including a substrate provided with a gain section having an active waveguide from which a gain of laser light is obtained and a distributed reflector section having a passive waveguide connected to the active waveguide, wherein the distributed reflector section includes gratings disposed on or under the passive waveguide, a current injection electrode disposed on the passive waveguide and configured to provide a current into the passive waveguide to electrically tune a wavelength of the laser light, and a heater electrode disposed on the current injection electrode and configured to heat the passive waveguide to thermally tune the wavelength of the laser light, wherein the gratings, the current injection electrode, and the heater electrode vertically overlap each other.
    Type: Application
    Filed: September 22, 2017
    Publication date: July 19, 2018
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Oh Kee KWON, Chul-Wook LEE, Su Hwan OH, Kisoo KIM
  • Patent number: 9927484
    Abstract: Provided herein is a radio frequency probe apparatus including a RF waveguide including a ground electrode and a signal electrode, a register connected to the signal electrode, a RF connector including an outer conductor connected to the ground electrode, an inner conductor connected to the signal electrode, and a dielectric body filling a portion between the outer conductor and the inner conductor, and a single tip probe connected to the signal electrode of the RF waveguide, or the register.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: March 27, 2018
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Oh Kee Kwon, Young Tak Han, Ki Soo Kim, Su Hwan Oh, Chul Wook Lee, Young Ahn Leem
  • Patent number: 9859682
    Abstract: In a luminescent diode and a method for manufacturing the same, a planar buried heterostructure (PBH) and a ridge waveguide structure are combined, so that the luminescent diode can be operated to generate a high output of 100 mW or more at low current. Further, it is possible to reduce electro-optic loss. In addition, the luminescent diode is applied to a wavelength tunable external cavity laser, so that it is possible to provide an external cavity laser having excellent output characteristics.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: January 2, 2018
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Su Hwan Oh, Min Su Kim
  • Patent number: 9590135
    Abstract: A superluminescent diode and a method for implementing the same, wherein the method includes growing a first epi layer on top of an SI (semi-insulating substrate); re-growing a butt based on the first epi layer; forming a tapered SSC (spot size converter) on the re-grown butt layer; forming an optical waveguide on an active area that is based on the first epi layer and on an SSC area that is based on the tapered SSC; forming an RWG on the optical waveguide; and forming a p-type electrode and an n-type electrode.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: March 7, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Su Hwan Oh, Min Su Kim
  • Publication number: 20170047710
    Abstract: In a luminescent diode and a method for manufacturing the same, a planar buried heterostructure (PBH) and a ridge waveguide structure are combined, so that the luminescent diode can be operated to generate a high output of 100 mW or more at low current. Further, it is possible to reduce electro-optic loss. In addition, the luminescent diode is applied to a wavelength tunable external cavity laser, so that it is possible to provide an external cavity laser having excellent output characteristics.
    Type: Application
    Filed: May 20, 2016
    Publication date: February 16, 2017
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Su Hwan OH, Min Su KIM
  • Publication number: 20170023635
    Abstract: Provided herein is a radio frequency probe apparatus including a RF waveguide including a ground electrode and a signal electrode, a register connected to the signal electrode, a RF connector including an outer conductor connected to the ground electrode, an inner conductor connected to the signal electrode, and a dielectric body filling a portion between the outer conductor and the inner conductor, and a single tip probe connected to the signal electrode of the RF waveguide, or the register.
    Type: Application
    Filed: June 27, 2016
    Publication date: January 26, 2017
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Oh Kee KWON, Young Tak HAN, Ki Soo KIM, Su Hwan OH, Chul Wook LEE, Young Ahn LEEM
  • Publication number: 20160300979
    Abstract: A superluminescent diode and a method for implementing the same, wherein the method includes growing a first epi layer on top of an SI (semi-insulating substrate); re-growing a butt based on the first epi layer; forming a tapered SSC (spot size converter) on the re-grown butt layer; forming an optical waveguide on an active area that is based on the first epi layer and on an SSC area that is based on the tapered SSC; forming an RWG on the optical waveguide; and forming a p-type electrode and an n-type electrode.
    Type: Application
    Filed: June 23, 2016
    Publication date: October 13, 2016
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Su Hwan OH, Min Su KIM
  • Patent number: 9397254
    Abstract: A superluminescent diode and a method for implementing the same, wherein the method includes growing a first epi layer on top of an SI (semi-insulating substrate); re-growing a butt based on the first epi layer; forming a tapered SSC (spot size converter) on the re-grown butt layer; forming an optical waveguide on an active area that is based on the first epi layer and on an SSC area that is based on the tapered SSC; forming an RWG on the optical waveguide; and forming a p-type electrode and an n-type electrode.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: July 19, 2016
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Su Hwan Oh, Min Su Kim
  • 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
  • Patent number: 9276376
    Abstract: A laser module includes a Transmitter Optical Sub-Assembly (TOSA) and a heat radiating means. The TOSA generates light by an electrical signal and transmits the generated light through an optical fiber. The heat radiating means is in contact with the TOSA to discharge heat generated by the TOSA.
    Type: Grant
    Filed: July 21, 2014
    Date of Patent: March 1, 2016
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Su Hwan Oh, Oh Kee Kwon
  • Publication number: 20150349491
    Abstract: Provided herein is a distributed bragg reflector ridge laser diode that is capable of easily embodying a diffraction grating and that minimizes an optical absorption effect on a DBR area, and a fabricating method thereof, the distributed bragg reflector ridge laser diode including a lower clad layer formed on top of a substrate; an active core zone formed on top of the lower clad layer; a plurality of ridge wave guides formed on top of the active core zone such that they are spaced from one another and extend in an axial direction; and a diffraction grating formed on top of the active core zone and between the plurality of ridge wave guides.
    Type: Application
    Filed: January 21, 2015
    Publication date: December 3, 2015
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Oh Kee KWON, Su Hwan OH, Chul Wook LEE