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: 20230227960Abstract: Provided is a method of manufacturing an optical integrated device. The method includes forming a lower clad layer on a substrate, forming a plurality of mask patterns arranged in one direction on the lower clad layer, forming a core layer on a portion of the lower clad layer by a selective area growth method using the mask patterns as deposition masks, and forming an upper clad layer on the core layers, wherein the mask patterns have different widths or include mask layers of different materials.Type: ApplicationFiled: October 18, 2022Publication date: July 20, 2023Applicant: Electronics and Telecommunications Research InstituteInventors: O-Kyun KWON, Namje KIM, Ho Sung KIM, Miran PARK, SEUNGCHUL LEE, Won Seok HAN
-
Patent number: 11018475Abstract: 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: GrantFiled: September 5, 2019Date of Patent: May 25, 2021Assignee: Electronics and Telecommunications Research InstituteInventors: Namje Kim, O-Kyun Kwon, Miran Park, Tae-Soo Kim, Shinmo An, Won Seok Han
-
Patent number: 10985530Abstract: 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: GrantFiled: August 13, 2019Date of Patent: April 20, 2021Assignee: Electronics and Telecommunications Research InstituteInventors: O-Kyun Kwon, Namje Kim, Miran Park, Tae-Soo Kim, Shinmo An, Won Seok Han
-
Publication number: 20200212652Abstract: 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: ApplicationFiled: September 5, 2019Publication date: July 2, 2020Applicant: Electronics and Telecommunications Research InstituteInventors: Namje KIM, O-Kyun KWON, Miran PARK, Tae-Soo KIM, Shinmo AN, Won Seok HAN
-
Publication number: 20200212653Abstract: 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: ApplicationFiled: August 13, 2019Publication date: July 2, 2020Applicant: Electronics and Telecommunications Research InstituteInventors: O-Kyun KWON, namje KIM, Miran PARK, Tae-Soo KIM, Shinmo AN, Won Seok HAN
-
Publication number: 20190165863Abstract: 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: ApplicationFiled: December 27, 2017Publication date: May 30, 2019Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: O-Kyun KWON, Namje KIM, Miran PARK, Shinmo AN, Won Seok HAN
-
Patent number: 10291327Abstract: 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: GrantFiled: December 27, 2017Date of Patent: May 14, 2019Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: O-Kyun Kwon, Namje Kim, Miran Park, Shinmo An, Won Seok Han
-
Publication number: 20180039033Abstract: 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: ApplicationFiled: October 17, 2017Publication date: February 8, 2018Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Mi Ran PARK, O Kyun KWON, Hyun Soo KIM, Jong Sool JEONG
-
Patent number: 9477013Abstract: 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: GrantFiled: February 11, 2015Date of Patent: October 25, 2016Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Dong Hun Lee, Jong Sool Jeong, Ki Soo Kim, Hyun Soo Kim, Mi Ran Park, O Kyun Kwon
-
Patent number: 9420357Abstract: 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: GrantFiled: February 11, 2015Date of Patent: August 16, 2016Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Jong Sool Jeong, Dong Hun Lee, Mi Ran Park, Byung Seok Choi, Hyun Soo Kim, O Kyun Kwon
-
Patent number: 9343614Abstract: 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: GrantFiled: February 6, 2015Date of Patent: May 17, 2016Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Su Hwan Oh, Ki-Hong Yoon, Kisoo Kim, O-Kyun Kwon, Oh Kee Kwon, Byung-Seok Choi, Jongbae Kim
-
Publication number: 20160062061Abstract: 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: ApplicationFiled: August 31, 2015Publication date: March 3, 2016Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Mi Ran PARK, O Kyun KWON, Hyun Soo KIM, Jong Sool JEONG
-
Patent number: 9229183Abstract: 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: GrantFiled: August 28, 2013Date of Patent: January 5, 2016Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Mi-Ran Park, Jong Sool Jeong, Hyun Soo Kim, Byungseok Choi, Young Tak Han, O-Kyun Kwon
-
Publication number: 20150288143Abstract: 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: ApplicationFiled: April 1, 2015Publication date: October 8, 2015Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Byung Seok CHOI, O Kyun KWON, Ki Soo KIM, Jong Sool JEONG, Su Hwan OH, Ki Hong YOON
-
Patent number: 9148227Abstract: 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: GrantFiled: April 22, 2014Date of Patent: September 29, 2015Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Hyun Soo Kim, Dong-Hun Lee, Mi-Ran Park, Byung-Seok Choi, Kisoo Kim, O-Kyun Kwon
-
Publication number: 20150236473Abstract: 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: ApplicationFiled: February 11, 2015Publication date: August 20, 2015Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Dong Hun LEE, Jong Sool JEONG, Ki Soo KIM, Hyun Soo KIM, Mi Ran PARK, O Kyun KWON
-
Publication number: 20150236797Abstract: 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: ApplicationFiled: February 11, 2015Publication date: August 20, 2015Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Jong Sool JEONG, Dong Hun LEE, Mi Ran PARK, Byung Seok CHOI, Hyun Soo KIM, O Kyun KWON
-
Patent number: 9099839Abstract: 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: GrantFiled: September 5, 2014Date of Patent: August 4, 2015Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Ki Hong Yoon, Byung Seok Choi, O Kyun Kwon, Jong Sool Jeong, Ki Soo Kim
-
Publication number: 20150155428Abstract: 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: ApplicationFiled: February 6, 2015Publication date: June 4, 2015Applicant: Electronics and Telecommunications Research InstituteInventors: Su Hwan OH, Ki-Hong YOON, Kisoo KIM, O-Kyun KWON, Oh Kee KWON, Byung-Seok CHOI, Jongbae KIM
-
Patent number: 9042686Abstract: 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: GrantFiled: June 4, 2012Date of Patent: May 26, 2015Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Hyun Soo Kim, Jong Sool Jeong, Mi-Ran Park, Byungseok Choi, O-Kyun Kwon