Patents by Inventor O Kyun Kwon

O Kyun Kwon 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: 20200212653
    Abstract: Provided is a tunable semiconductor laser including an active gain region in which an optical signal is generated according to a modulation signal, a mode control region in which a resonant mode is controlled according to a mode control signal, and a signal chirp of the optical signal is compensated according to a first compensation signal determined based on the modulation signal, and a distributed Bragg reflector (DBR) region in which an oscillation wavelength of the optical signal is determined based on a wavelength selection signal for the optical signal, a second compensation signal for compensating for a thermal chirp of the optical signal on a basis of the modulation signal, and a heater signal provided to a heater electrode.
    Type: Application
    Filed: August 13, 2019
    Publication date: July 2, 2020
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: O-Kyun KWON, namje KIM, Miran PARK, Tae-Soo KIM, Shinmo AN, Won Seok HAN
  • Publication number: 20200212652
    Abstract: Provided is a quarter-wavelength shifted distributed feedback laser diode. The laser diode includes a substrate having a laser diode section and a phase adjustment section, a waveguide layer on the substrate, a clad layer on the waveguide layer, a grating disposed in the clad layer in the laser diode section, an anti-reflection coating disposed on one side walls, of the substrate, the waveguide layer, and the clad layer, adjacent to the laser diode section, and a high reflection coating disposed on the other side walls, of the substrate, the waveguide layer, and the clad layer, adjacent to the phase adjustment section.
    Type: Application
    Filed: September 5, 2019
    Publication date: July 2, 2020
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Namje KIM, O-Kyun KWON, Miran PARK, Tae-Soo KIM, Shinmo AN, Won Seok HAN
  • Publication number: 20190165863
    Abstract: An optical signal generating apparatus according to an embodiment of the inventive concept includes a first optical intensity modulator for modulating a first optical signal to generate a 2N-level (where N is a positive integer) second optical signal in the form of a binary signal, a first optical amplifier for amplifying the second optical signal to generate a third optical signal, and a second optical intensity modulator for modulating the third optical signal to generate a 2N+1-level fourth optical signal in the form of a binary signal. The optical signal generating apparatus according to an embodiment of the inventive concept may generate a low-cost, high-quality optical signal by using an optical device to generate a multi-level optical signal. Additionally, the optical signal generating apparatus according to an embodiment of the inventive concept may generate a multi-level optical signal by sequentially performing optical modulation and optical amplification operations.
    Type: Application
    Filed: December 27, 2017
    Publication date: May 30, 2019
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: O-Kyun KWON, Namje KIM, Miran PARK, Shinmo AN, Won Seok HAN
  • Patent number: 10291327
    Abstract: An optical signal generating apparatus according to an embodiment of the inventive concept includes a first optical intensity modulator for modulating a first optical signal to generate a 2N-level (where N is a positive integer) second optical signal in the form of a binary signal, a first optical amplifier for amplifying the second optical signal to generate a third optical signal, and a second optical intensity modulator for modulating the third optical signal to generate a 2N+1-level fourth optical signal in the form of a binary signal. The optical signal generating apparatus according to an embodiment of the inventive concept may generate a low-cost, high-quality optical signal by using an optical device to generate a multi-level optical signal. Additionally, the optical signal generating apparatus according to an embodiment of the inventive concept may generate a multi-level optical signal by sequentially performing optical modulation and optical amplification operations.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: May 14, 2019
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: O-Kyun Kwon, Namje Kim, Miran Park, Shinmo An, Won Seok Han
  • Publication number: 20180039033
    Abstract: Provided herein is a multi-channel optical module that transmits or receives an optical signal of multi-channels and a manufacturing method thereof, the multi-channel optical module including a multi-channel optical fiber block configured to transmit an optical signal, a submount including an array optical receiving element unit configured to receive the optical signal; and a mirror unit arranged on a metal optical bench and configured to induce the optical signal transmitted from the multi-channel optical fiber block to the array optical receiving element unit, wherein for the inducement of the optical signal to the array optical receiving element unit, the mirror unit is passively aligned with the array optical receiving element unit, and the multi-channel optical fiber block is actively aligned with the mirror unit.
    Type: Application
    Filed: October 17, 2017
    Publication date: February 8, 2018
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Mi Ran PARK, O Kyun KWON, Hyun Soo KIM, Jong Sool JEONG
  • Patent number: 9477013
    Abstract: Disclosed is an optical source device. The optical source device includes: a mode converter configured to be optically coupled with an optical fiber; a semiconductor optical amplifier coupled with the mode converter, and configured to amplify an optical signal input through the optical fiber; and an electro absorption modulator coupled to the optical amplifier, and configured to modulate the amplified optical signal and output the modulated optical signal, in which each of the semiconductor optical amplifier and the optical absorption modulator includes a heater.
    Type: Grant
    Filed: February 11, 2015
    Date of Patent: October 25, 2016
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Dong Hun Lee, Jong Sool Jeong, Ki Soo Kim, Hyun Soo Kim, Mi Ran Park, O Kyun Kwon
  • Patent number: 9420357
    Abstract: Disclosed are a method and an apparatus for selecting a wavelength by a wavelength tunable optical receiver. The method of selecting a wavelength of a wavelength tunable optical receiver includes: receiving, by the wavelength tunable optical receiver, an optical signal from a wavelength tunable optical transmitter; filtering, by the wavelength tunable optical receiver, the optical signal through a low frequency band electrical signal filter, and obtaining a low frequency signal; determining, by the wavelength tunable optical receiver, whether the low frequency signal is a valid signal based on a current value of the low frequency signal; and when the low frequency signal is the valid signal, obtaining, by the wavelength tunable optical receiver, an enable condition of a wavelength tunable optical filter through which the low frequency signal is selected, in which the low frequency signal includes a control/monitoring signal.
    Type: Grant
    Filed: February 11, 2015
    Date of Patent: August 16, 2016
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Jong Sool Jeong, Dong Hun Lee, Mi Ran Park, Byung Seok Choi, Hyun Soo Kim, O Kyun Kwon
  • 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: 20160062061
    Abstract: Provided herein is a multi-channel optical module that transmits or receives an optical signal of multi-channels and a manufacturing method thereof, the multi-channel optical module including a multi-channel optical fiber block configured to transmit an optical signal, a submount including an array optical receiving element unit configured to receive the optical signal; and a mirror unit arranged on a metal optical bench and configured to induce the optical signal transmitted from the multi-channel optical fiber block to the array optical receiving element unit, wherein for the inducement of the optical signal to the array optical receiving element unit, the mirror unit is passively aligned with the array optical receiving element unit, and the multi-channel optical fiber block is actively aligned with the mirror unit.
    Type: Application
    Filed: August 31, 2015
    Publication date: March 3, 2016
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Mi Ran PARK, O Kyun KWON, Hyun Soo KIM, Jong Sool JEONG
  • Patent number: 9229183
    Abstract: Disclosed is a multi-channel receiver optical sub assembly. The a multi-channel receiver optical sub assembly includes: a multi-channel PD array, in which a plurality of photodiodes (PDs) disposed on a first capacitor, and including receiving areas disposed at centers thereof and anode electrode pads arranged in an opposite direction at an angle of 180 degrees based on the receiving areas between the adjacent PDs is monolithically integrated; a plurality of transimpedance amplifiers (TIAs) arranged on a plurality of second capacitors, respectively, and connected with the anode pads of the respective PDs through wire bonding; a submount on which the first capacitor.
    Type: Grant
    Filed: August 28, 2013
    Date of Patent: January 5, 2016
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Mi-Ran Park, Jong Sool Jeong, Hyun Soo Kim, Byungseok Choi, Young Tak Han, O-Kyun Kwon
  • 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: 9148227
    Abstract: Provided is a reflective colorless optical transmitter receiving a carrier signal, which is a continuous wave, and outputting a modulated optical signal. The reflective colorless optical transmitter includes a semiconductor optical amplifier (SOA) amplifying an input optical signal allowing the input optical signal to have a gain, an optical modulator connected to the SOA and outputting a modulated optical signal, a high reflectivity facet reflecting the modulated optical signal from the optical modulator, and a Bragg reflection mirror connected to the high reflectivity facet, the optical modulator, and the SOA in series, wherein a Bragg resonator is formed by the Bragg reflecting mirror and the high reflectivity facet.
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: September 29, 2015
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Hyun Soo Kim, Dong-Hun Lee, Mi-Ran Park, Byung-Seok Choi, Kisoo Kim, O-Kyun Kwon
  • Publication number: 20150236473
    Abstract: Disclosed is an optical source device. The optical source device includes: a mode converter configured to be optically coupled with an optical fiber; a semiconductor optical amplifier coupled with the mode converter, and configured to amplify an optical signal input through the optical fiber; and an electro absorption modulator coupled to the optical amplifier, and configured to modulate the amplified optical signal and output the modulated optical signal, in which each of the semiconductor optical amplifier and the optical absorption modulator includes a heater.
    Type: Application
    Filed: February 11, 2015
    Publication date: August 20, 2015
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Dong Hun LEE, Jong Sool JEONG, Ki Soo KIM, Hyun Soo KIM, Mi Ran PARK, O Kyun KWON
  • Publication number: 20150236797
    Abstract: Disclosed are a method and an apparatus for selecting a wavelength by a wavelength tunable optical receiver. The method of selecting a wavelength of a wavelength tunable optical receiver includes: receiving, by the wavelength tunable optical receiver, an optical signal from a wavelength tunable optical transmitter; filtering, by the wavelength tunable optical receiver, the optical signal through a low frequency band electrical signal filter, and obtaining a low frequency signal; determining, by the wavelength tunable optical receiver, whether the low frequency signal is a valid signal based on a current value of the low frequency signal; and when the low frequency signal is the valid signal, obtaining, by the wavelength tunable optical receiver, an enable condition of a wavelength tunable optical filter through which the low frequency signal is selected, in which the low frequency signal includes a control/monitoring signal.
    Type: Application
    Filed: February 11, 2015
    Publication date: August 20, 2015
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Jong Sool JEONG, Dong Hun LEE, Mi Ran PARK, Byung Seok CHOI, Hyun Soo KIM, O Kyun KWON
  • 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: 9042686
    Abstract: Disclosed are an optical waveguide platform with integrated active transmission device and monitoring photodiode. The optical waveguide platform with hybrid integrated optical transmission device and optical active device includes an optical waveguide region formed by stacking a lower cladding layer, a core layer and an upper cladding layer on a substrate; a trench region formed by etching a portion of the optical waveguide region; and a spot expanding region formed on the core layer in the optical waveguide region, in which the optical transmission device is mounted in the trench region and the optical active device is flip-chip bonded to the spot expanding region. The monitoring photodiode is flip-chip bonded to the spot expanding region of the core layer of the optical waveguide, thereby monitoring output light including an optical coupling loss that occurs during flip-chip bonding.
    Type: Grant
    Filed: June 4, 2012
    Date of Patent: May 26, 2015
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Hyun Soo Kim, Jong Sool Jeong, Mi-Ran Park, Byungseok Choi, O-Kyun Kwon
  • Publication number: 20150125159
    Abstract: Provided is a reflective colorless optical transmitter receiving a carrier signal, which is a continuous wave, and outputting a modulated optical signal. The reflective colorless optical transmitter includes a semiconductor optical amplifier (SOA) amplifying an input optical signal allowing the input optical signal to have a gain, an optical modulator connected to the SOA and outputting a modulated optical signal, a high reflectivity facet reflecting the modulated optical signal from the optical modulator, and a Bragg reflection mirror connected to the high reflectivity facet, the optical modulator, and the SOA in series, wherein a Bragg resonator is formed by the Bragg reflecting mirror and the high reflectivity facet.
    Type: Application
    Filed: April 22, 2014
    Publication date: May 7, 2015
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Hyun Soo KIM, Dong-Hun LEE, Mi-Ran PARK, Byung-Seok CHOI, Kisoo KIM, O-Kyun KWON
  • Publication number: 20150110144
    Abstract: A distributed feedback-laser diode may include a substrate, a lower cladding layer having a grating on the substrate, an active layer disposed on the lower cladding layer, a first upper cladding layer disposed on the active layer, a phase-shift region extending in a first direction on the first upper cladding layer, and a ridge waveguide layer extending in a second direction crossing the first direction on the phase-shift region.
    Type: Application
    Filed: December 15, 2014
    Publication date: April 23, 2015
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Oh Kee KWON, Su Hwan OH, Young Ahn LEEM, O-Kyun KWON, Young-Tak HAN, Yongsoon BAEK, Yun C. CHUNG
  • Patent number: 8999744
    Abstract: Provided are an avalanche photodiode and a method of fabricating the same. The method of fabricating the avalanche photodiode includes sequentially forming a compound semiconductor absorption layer, a compound semiconductor grading layer, a charge sheet layer, a compound semiconductor amplification layer, a selective wet etch layer, and a p-type conductive layer on an n-type substrate through a metal organic chemical vapor deposition process.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: April 7, 2015
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Mi-Ran Park, O-Kyun Kwon