Patents by Inventor Namje Kim
Namje Kim 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).
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Patent number: 8213478Abstract: Provided is a laser device. In the laser device, an active layer is connected to a stem core of a 1×2 splitter on a substrate, a first diffraction grating is coupled to a first twig core of the 1×2 splitter, and a second diffraction grating is coupled to a second twig core of the 1×2 splitter. An active layer-micro heater is designed to supply heat to the active layer. First and second micro heaters are designed to supply heats to the first and second diffraction gratings, respectively, thereby varying a Bragg wavelength.Type: GrantFiled: August 13, 2010Date of Patent: July 3, 2012Assignee: Electronics and Telecommunications Research InstituteInventors: Kyung Hyun Park, Namje Kim, Young Ahn Leem, Sang-Pil Han, Chul-Wook Lee, Jaeheon Shin, Eundeok Sim, Yongsoon Baek
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Publication number: 20120153161Abstract: Provided are a THz-wave generation/detection module and a device including the same, which increase heating efficiency and are miniaturized. The module includes a photomixer chip, a lens, a PCB, and a package. The photomixer chip includes an active layer, an antenna, and a plurality of electrode pads. The lens is disposed on the photomixer chip. The PCB includes a plurality of solder balls connected to the electrode pads, under the photomixer chip. The package surrounds a bottom and side of the PCB, and dissipates heating of the active layer, which is transferred from the electrode pad of the photomixer chip to the PCB, to outside.Type: ApplicationFiled: December 2, 2011Publication date: June 21, 2012Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Sang-Pil Han, Kyung Hyun Park, Hyunsung Ko, Namje Kim, Chul-Wook Lee, Dong-Hun Lee, Young Ahn Leem
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Publication number: 20120147907Abstract: Disclosed is a terahertz wave generator which includes a dual mode semiconductor laser device configured to generate at least two laser lights having different wavelengths and to beat the generated laser lights; and a photo mixer formed on the same chip as the dual mode semiconductor laser device and to generate a continuous terahertz wave when excited by the beat laser light.Type: ApplicationFiled: September 6, 2011Publication date: June 14, 2012Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Namje KIM, Kyung Hyun PARK, Young Ahn LEEM, Hyunsung KO, Sang-Pil HAN, Chul-Wook LEE, Dong-Hun LEE
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Patent number: 8149890Abstract: Provided is a multiple distributed feedback laser device which includes a first distributed feedback region, a modulation region, a second distributed feedback region, and an amplification region. An active layer is disposed on the substrate of the first distributed feedback region, the modulation region, the second distributed feedback region, and the amplification region. A first diffraction grating is disposed in the first distributed feedback region to be coupled to the active layer in the first distributed feedback region. A second diffraction grating is disposed in the second distributed feedback region to be coupled to the active layer in the second distributed feedback region. The multiple distributed feedback laser device further includes a first micro heater configured to supply heat to the first diffraction grating and a second micro heater configured to supply heat to the second diffraction grating.Type: GrantFiled: December 29, 2010Date of Patent: April 3, 2012Assignee: Electronics and Telecommunications Research InstituteInventors: Kyung Hyun Park, Namje Kim, Young Ahn Leem, Sang-Pil Han, Hyunsung Ko, Chul-Wook Lee, Dong-Hun Lee, Jaeheon Shin, Eundeok Sim, Yongsoon Baek
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Publication number: 20120051386Abstract: Provided are a dual mode semiconductor laser and a terahertz wave apparatus using the same. The dual mode semiconductor laser includes a distributed feedback laser structure section including a first diffraction grating on a substrate and a distributed Bragg reflector laser structure section including a second diffraction grating on the substrate. A first wavelength oscillated by the distributed feedback laser structure section and a second wavelength oscillated by the distributed Bragg reflector laser structure section are different from each other, and the distributed feedback laser structure section and the distributed Bragg reflector laser structure section share the same gain medium with each other.Type: ApplicationFiled: February 8, 2011Publication date: March 1, 2012Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Namje KIM, Kyung Hyun PARK, Young Ahn LEEM, Chul-Wook LEE, Sang-Pil HAN, Dong-Hun LEE, Min Yong JEON
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Patent number: 8039802Abstract: Provided are an apparatus for generating/detecting terahertz wave and a method of manufacturing the same. The apparatus includes a substrate, a photo conductive layer, a first electrode and a second electrode, and a lens. The photo conductive layer is formed on an entire surface of the substrate. The first electrode and a second electrode formed on the photo conductive layer. The first and second electrodes are spaced from each other by a certain gap. The lens is formed on the first and second electrodes. The lens is filled in the gap between the first and second electrodes.Type: GrantFiled: April 21, 2010Date of Patent: October 18, 2011Assignee: Electronics and Telecommunications Research InstituteInventors: Jaeheon Shin, Kyung Hyun Park, Namje Kim, Sang-Pil Han, Chul-Wook Lee, Eundeok Sim, Yongsoon Baek
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Publication number: 20110150018Abstract: Provided is a laser device. In the laser device, an active layer is connected to a stem core of a 1×2 splitter on a substrate, a first diffraction grating is coupled to a first twig core of the 1×2 splitter, and a second diffraction grating is coupled to a second twig core of the 1×2 splitter. An active layer-micro heater is designed to supply heat to the active layer. First and second micro heaters are designed to supply heats to the first and second diffraction gratings, respectively, thereby varying a Bragg wavelength.Type: ApplicationFiled: August 13, 2010Publication date: June 23, 2011Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Kyung Hyun PARK, Namje Kim, Young Ahn Leem, Sang-Pil Han, Chul-Wook Lee, Jaeheon Shin, Eundeok Sim, Yongsoon Baek
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Publication number: 20110149368Abstract: Provided are a photomixer module and a method of generating a terahertz wave. The photomixer module includes a semiconductor optical amplifier amplifying incident laser light and a photomixer that is excited by the amplified laser light to generate a continuous terahertz wave. The photomixer is formed as a single module together with the semiconductor optical amplifier.Type: ApplicationFiled: May 26, 2010Publication date: June 23, 2011Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Namje KIM, Kyung Hyun Park, Young Ahn Leem, Sang-Pil Han, Chul-Wook Lee, Eundeok Sim, Jaeheon Shin
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Publication number: 20110142082Abstract: Provided is a fiber laser generating Terahertz wave. The fiber laser comprises: a light source generating a laser beam as a pump light; first and second resonators first and second resonators first and second resonators resonating the laser beam into first and second wavelengths; and a coupler separating and supplying the laser beam generated in the light source to the first and second resonators and again feeding back the laser beam having the first and second wavelengths resonated respectively in the first and second resonators to the light source.Type: ApplicationFiled: October 20, 2010Publication date: June 16, 2011Applicant: ELECTRONIC AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Min Yong JEON, Kyung Hyun Park, Namje Kim, Young Ahn Leem, Sang-Pil Han, Yongsoon Baek, Jaeheon Shin
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Publication number: 20110090932Abstract: Provided is a multiple distributed feedback laser device which includes a first distributed feedback region, a modulation region, a second distributed feedback region, and an amplification region. An active layer is disposed on the substrate of the first distributed feedback region, the modulation region, the second distributed feedback region, and the amplification region. A first diffraction grating is disposed in the first distributed feedback region to be coupled to the active layer in the first distributed feedback region. A second diffraction grating is disposed in the second distributed feedback region to be coupled to the active layer in the second distributed feedback region. The multiple distributed feedback laser device further includes a first micro heater configured to supply heat to the first diffraction grating and a second micro heater configured to supply heat to the second diffraction grating.Type: ApplicationFiled: December 29, 2010Publication date: April 21, 2011Inventors: Kyung Hyun PARK, Namje Kim, Young Ahn Leem, Sang-Pil Han, Hyunsung Ko, Chul-Wook Lee, Dong-Hun Lee, Jaeheon Shin, Eundeok Sim, Yongsoon Baek
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Publication number: 20110068270Abstract: Provided are an apparatus for generating/detecting terahertz wave and a method of manufacturing the same. The apparatus includes a substrate, a photo conductive layer, a first electrode and a second electrode, and a lens. The photo conductive layer is formed on an entire surface of the substrate. The first electrode and a second electrode are formed on the photo conductive layer. The first and second electrodes are spaced from each other by a certain gap. The lens is formed on the first and second electrodes. The lens is filled in the gap between the first and second electrodes.Type: ApplicationFiled: April 21, 2010Publication date: March 24, 2011Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Jaeheon SHIN, Kyung Hyun Park, Namje Kim, Sang-Pil Han, Chul-Wook Lee, Eundeok Sim, Yongsoon Baek
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Patent number: 7864824Abstract: Provided is a multiple distributed feedback laser device. The laser device includes an active layer, a first diffraction grating, and a second diffraction grating. The substrate includes a first distributed feedback region, a modulation region, and a second distributed feedback region. The first diffraction grating is coupled to the active layer in the first distributed feedback region. The second diffraction grating is coupled to the active layer in the second distributed feedback region. In addition, the laser device includes a first micro heater and a second micro heater. The first micro heater supplies heat to the first diffraction grating. The second micro heater supplies heat to the second diffraction grating. The first micro heater and the second micro heater are controlled independently from each other.Type: GrantFiled: July 20, 2009Date of Patent: January 4, 2011Assignee: Electronics and Telecommunications Research InstituteInventors: Kyung Hyun Park, Jaeheon Shin, Namje Kim, Chul-Wook Lee, Eundeok Sim, Sang-Pil Han, Yongsoon Baek
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Publication number: 20100142571Abstract: Provided is a multiple distributed feedback laser device. The laser device includes an active layer, a first diffraction grating, and a second diffraction grating. The substrate includes a first distributed feedback region, a modulation region, and a second distributed feedback region. The first diffraction grating is coupled to the active layer in the first distributed feedback region. The second diffraction grating is coupled to the active layer in the second distributed feedback region. In addition, the laser device includes a first micro heater and a second micro heater. The first micro heater supplies heat to the first diffraction grating. The second micro heater supplies heat to the second diffraction grating. The first micro heater and the second micro heater are controlled independently from each other.Type: ApplicationFiled: July 20, 2009Publication date: June 10, 2010Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Kyung Hyun PARK, Jaeheon Shin, Namje Kim, Chul-Wook Lee, Eundeok Sim, Sang-Pil Han, Yongsoon Baek