Patents by Inventor Sang Pil Han
Sang Pil Han 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: 8774568Abstract: Provided is an optical module. The optical module includes: an optical bench having a first trench of a first depth and a second trench of a second depth that is less than the first depth; a lens in the first trench of the optical bench; at least one semiconductor chip in the second trench of the optical bench; and a flexible printed circuit board covering an upper surface of the optical bench except for the first and second trenches, wherein the optical bench is a metal optical bench or a silicon optical bench.Type: GrantFiled: June 7, 2011Date of Patent: July 8, 2014Assignee: Electronics and Telecommunications Research InstituteInventors: Young-Tak Han, Jang Uk Shin, Sang-Pil Han, Sang Ho Park, Yongsoon Baek
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Publication number: 20140183441Abstract: Provided is a terahertz wave generating/detecting apparatus and a method for manufacturing the same. The terahertz wave generating/detecting apparatus includes; a substrate having an active region and a transmitting region; a lower metal layer extending in a first direction on the active region and the transmitting region of the substrate; a graphene layer disposed on the lower metal layer on the active region; and upper metal layers extending in the first direction on the graphene layer of the active region and the substrate in the transmission region, wherein a terahertz wave is generated or amplified by a surface plasmon polariton that is induced on a boundary surface between the graphene layer and the lower metal layer by beated laser light applied to the graphene layer and the metal layer.Type: ApplicationFiled: October 25, 2013Publication date: July 3, 2014Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Kyung Hyun PARK, Sang-Pil HAN, Jeong Woo PARK, Han-Cheol RYU, Kiwon MOON, Namje KIM, Hyunsung KO
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Publication number: 20140175306Abstract: The inventive concept relates to a beating signal monitoring module and a terahertz wave generation device and an optical signal monitoring device that including the beating signal monitoring module. The beating signal monitoring module includes a nonlinear unit generating an optical signal including a FWM light in response to a beating signal generated from a first light and a second light; a filter unit separating the FWM light from the optical signal and outputting the separated FWM light; and a monitoring unit monitoring the beating signal using the separated FWM light. The beating signal monitoring module and a terahertz wave generation device and an optical signal monitoring device that including the beating signal monitoring module can effectively monitor a beating signal being generated by two lasers using a Four Wave Mixing signal.Type: ApplicationFiled: September 10, 2013Publication date: June 26, 2014Applicant: Electronics and Telecommunications Research InstituteInventors: Namje KIM, Sang-Pil HAN, Kyung Hyun PARK, Han-Cheol RYU, Hyunsung KO, Jeong Woo PARK
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Publication number: 20140166881Abstract: A terahertz wave generating module includes a bidirectional light source which provides a first dual-mode beam in a first direction and a second dual-mode beam in a second direction; a forward lens unit which focuses the first dual-mode beam; a photomixer unit which converts the first dual-mode beam focused by the forward lens unit into a terahertz wave; a backward lens unit which focuses the second dual-mode beam; and a light output unit which uses the second dual-mode beam focused by the backward lens unit as a light signal, wherein the bidirectional light source, the forward lens unit, the photomixer unit, the backward lens unit, and the light output unit are integrated in a housing.Type: ApplicationFiled: October 8, 2013Publication date: June 19, 2014Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Sang-Pil HAN, Kyung Hyun PARK, Namje KIM, Han-Cheol RYU, Jeong Woo PARK, Hyunsung KO, Kiwon MOON
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Patent number: 8615147Abstract: Provided are an optical switch device having a simple light path and capable of achieving high speed switching, and a method of manufacturing the optical switch device. The optical switch device comprises one or more first optical waveguides extending in a first direction, one or more second optical waveguides connected to the first optical waveguides in a second direction crossing the first direction, and one or more switching parts configured to control light transmitted in the first direction within the first optical waveguide connected with the second waveguide, to selectively reflect the light to the second waveguide extending in the second direction.Type: GrantFiled: January 10, 2011Date of Patent: December 24, 2013Assignee: Electronics and Telecommunications Research InstituteInventors: Young-Tak Han, Jang Uk Shin, Sang Ho Park, Sang-Pil Han, Yongsoon Baek
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Patent number: 8610094Abstract: Disclosed is a terahertz wave generator which includes a first light source outputting a first light having a first frequency; a second light source outputting a second light having a second frequency different from the first frequency; a second harmonic generation unit performing second harmonic conversion on the first and second lights to generate a third light and a fourth light; and a photomixer converting a mixing light of the third and fourth lights into a terahertz wave alternating signal and outputting a terahertz wave.Type: GrantFiled: September 13, 2012Date of Patent: December 17, 2013Assignee: Electronics and Telecommunications Research InstituteInventors: Namje Kim, Kyung Hyun Park, Sang-Pil Han, Hyunsung Ko, Jeong Woo Park, Han-Cheol Ryu
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Publication number: 20130320215Abstract: Disclosed herein is an interconnection apparatus and method using terahertz waves. The interconnection apparatus using terahertz waves according to the present invention includes a first terahertz wave generation unit for generating a first transmission terahertz wave, a center frequency of which is a first center frequency, using photomixing. A second terahertz wave generation unit generates a second transmission terahertz wave, a center frequency of which is a second center frequency different from the first center frequency. A first terahertz wave detection unit detects a first reception terahertz wave corresponding to the first transmission terahertz wave. A second terahertz wave detection unit detects a second reception terahertz wave corresponding to the second transmission terahertz wave.Type: ApplicationFiled: May 31, 2013Publication date: December 5, 2013Inventors: Kyung-Hyun PARK, Han-Cheol RYU, Jeong-Woo PARK, Sang-Pil HAN, Nam-Je KIM
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Patent number: 8599893Abstract: 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: GrantFiled: September 6, 2011Date of Patent: December 3, 2013Assignee: 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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Publication number: 20130161541Abstract: Disclosed is a terahertz wave generator which includes a first light source outputting a first light having a first frequency; a second light source outputting a second light having a second frequency different from the first frequency; a second harmonic generation unit performing second harmonic conversion on the first and second lights to generate a third light and a fourth light; and a photomixer converting a mixing light of the third and fourth lights into a terahertz wave alternating signal and outputting a terahertz wave.Type: ApplicationFiled: September 13, 2012Publication date: June 27, 2013Applicant: Electronics and Telecommunications Research InstitueInventors: Namje KIM, Kyung Hyun Park, Sang-Pil Han, Hyunsung Ko, Jeong Woo Park, Han-Cheol Ryu
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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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Publication number: 20120128290Abstract: Provided is an optical module. The optical module includes: an optical bench having a first trench of a first depth and a second trench of a second depth that is lower than the first depth; a lens in the first trench of the optical bench; at least one semiconductor chip in the second trench of the optical bench; and a flexible printed circuit board covering an upper surface of the optical bench except for the first and second trenches, wherein the optical bench is a metal optical bench or a silicon optical bench.Type: ApplicationFiled: June 7, 2011Publication date: May 24, 2012Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Young-Tak HAN, Jang Uk Shin, Sang-Pil Han, Sang Ho Park, Yongsoon Baek
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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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Publication number: 20120020614Abstract: Provided are an optical switch device having a simple light path and capable of achieving high speed switching, and a method of manufacturing the optical switch device. The optical switch device comprises one or more first optical waveguides extending in a first direction, one or more second optical waveguides connected to the first optical waveguides in a second direction crossing the first direction, and one or more switching parts configured to control light transmitted in the first direction within the first optical waveguide connected with the second waveguide, to selectively reflect the light to the second waveguide extending in the second direction.Type: ApplicationFiled: January 10, 2011Publication date: January 26, 2012Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Young-Tak HAN, Jang Uk Shin, Sang Ho Park, Sang-Pil Han, Yongsoon Baek
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Patent number: 8086105Abstract: Provided is a wavelength division multiplexer/demultiplexer having a flat wavelength response. In the wavelength division multiplexer/demultiplexer, a modified taper-shaped optical waveguide is interposed between an input waveguide and a first slab waveguide, such that the distribution of an optical signal input to an Arrayed Waveguide Grating (AWG) has a sinc-function shape. Thus, a flat wavelength response can be obtained in an output waveguide. In addition, the modified taper-shaped optical waveguide interposed to obtain a flat wavelength response has a small size and a simple structure, and thus can be applied to a conventional wavelength division multiplexer/demultiplexer without a design change.Type: GrantFiled: September 30, 2008Date of Patent: December 27, 2011Assignee: Electronics and Telecommunications Research InstituteInventors: Jang Uk Shin, Sang Ho Park, Young Tak Han, Sang Pil Han, Yong Soon Baek
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Patent number: 8055106Abstract: An optical communication device provided with digital optical switching includes a substrate; and at least one optical switch including a first optical switch composed of a main core disposed on the substrate and extending along a first direction, the main core including an optical input part and a transmission output part sequentially arranged along the first direction; a heater extending along a second direction to cross the main core; and a reflection output part extending along a third direction from a central point of the main core. The first direction and the second direction define a first angle there between, the second direction and the third direction define a second angle there between, and the first angle is equal to the second angle. An optical signal is outputted through the reflection output part or the transmission output part in response to heat from operation of the heater.Type: GrantFiled: May 8, 2009Date of Patent: November 8, 2011Assignee: Electronics and Telecommunications Research InstituteInventors: Young-Tak Han, Jang Uk Shin, Sang-Pil Han, Sang Ho Park, Yongsoon Baek
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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