Patents by Inventor Nan-Ei Yu
Nan-Ei Yu 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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Publication number: 20240077594Abstract: Provided is an optical phase array antenna including a coupling unit for receiving light from a light source, a light distribution unit for distributing light propagated from the coupling unit to a plurality of optical paths, a phase modulation unit for modulating a phase of the light distributed from the light distribution unit, and a light output unit that outputs the light modulated by the phase modulation unit, and includes an antenna element waveguide extending at a predetermined length through which the light propagates, and a clad layer formed to surround the antenna element waveguide, in which the antenna element waveguide has a first recessed portion recessed downward with respect to an upper surface thereof, and the clad layer has a second recessed portion recessed downward with respect to an upper surface thereof at a position adjacent to the first recessed portion.Type: ApplicationFiled: December 28, 2022Publication date: March 7, 2024Applicant: GIST (Gwangju Institute of Science and Technology)Inventors: Nan Ei YU, Byeong Chan PARK
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Patent number: 11575199Abstract: The present invention relates to a light phased array antenna and a Light Detection and Ranging (LiDAR) including the same. The present invention provides a light phased array antenna including: a light distributing unit configured to receive light from a laser generator and distribute the received light to a plurality of antenna element waveguides; a phase modulating unit configured to modulate a phase of light propagated through the antenna element waveguides by applying an electric field to the plurality of antenna element waveguides; and a light output unit configured to output light modulated in the phase modulating unit, in which the light distributing unit, the phase modulating unit, and the light output unit include a base part and an optical waveguide provided on the base part and including the plurality of antenna element waveguides, and a LiDAR including the same.Type: GrantFiled: August 22, 2018Date of Patent: February 7, 2023Assignee: GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Nan Ei Yu, Kyung Hun Han, Victor Yurlov
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Publication number: 20220214596Abstract: Disclosed is an array antenna which is capable of shifting a phase of light. According to one aspect of the present exemplary embodiment, an optical phase shifting array antenna includes: a receiving unit configured to distribute input light to a plurality of antenna element waveguides; a phase shifting unit configured to shift a phase of light propagated to each antenna element waveguide by applying heat to each antenna element waveguide; an output unit including a plurality of antenna elements, and configured to output the light, which is propagated to each antenna element waveguide after a phase is varied in the phase shifting unit, to each antenna element; and a base part configured to seat the receiving unit, the phase shifting unit, and the output unit.Type: ApplicationFiled: March 23, 2022Publication date: July 7, 2022Applicant: GIST(Gwangju Institute of Science and Technology)Inventor: Nan Ei YU
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Publication number: 20220155419Abstract: Provided is an optical phase array antenna including a coupling part configured to receive light from a laser generator, an optical distributor configured to distribute the light transmitted from the coupling part to a plurality of antenna element waveguides, a phase modulator configured to modulate a phase of the light transmitted through the plurality of antenna element waveguides, and a light outputter configured to output the light modulated by the phase modulator, the light outputter including the plurality of antenna element waveguides extending in one direction, wherein each of the plurality of antenna element waveguides includes a double grating antenna part in which a downward-curved portion curved downward from an upper surface and an upward-curved portion curved upward from a lower surface are repeatedly formed in the one direction.Type: ApplicationFiled: October 15, 2021Publication date: May 19, 2022Applicant: GIST (Gwangju Institute of Science and Technology)Inventors: Nan Ei YU, Byeong Chan PARK
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Publication number: 20200259256Abstract: The present invention relates to a light phased array antenna and a Light Detection and Ranging (LiDAR) including the same. The present invention provides a light phased array antenna including: a light distributing unit configured to receive light from a laser generator and distribute the received light to a plurality of antenna element waveguides; a phase modulating unit configured to modulate a phase of light propagated through the antenna element waveguides by applying an electric field to the plurality of antenna element waveguides; and a light output unit configured to output light modulated in the phase modulating unit, in which the light distributing unit, the phase modulating unit, and the light output unit include a base part and an optical waveguide provided on the base part and including the plurality of antenna element waveguides, and a LiDAR including the same.Type: ApplicationFiled: August 22, 2018Publication date: August 13, 2020Inventors: Nan Ei YU, Kyung Hun HAN, Victor YURLOV
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Patent number: 10598931Abstract: Disclosed are a laser light source device for a head-up display and a head-up display system using the same, the laser light source device for the head-up display including a plurality of light sources which emit laser light and a condensing unit which condenses the laser light emitted from the light sources, is connected to an image forming unit that generates an image for displaying information on a vehicle operation using the laser light, and provides the condensed laser light to the image forming unit. The laser light source device for the head-up display according to the present disclosure and the head-up display system using the same have advantages that optical alignment is not easily destroyed even under harsh operating environment such as a vehicle where considerable vibration and temperature change are introduced, because the whole part of the condensing unit is optically connected by the optical fibers with a high stability on the contrary to a conventional bulk-optic based system.Type: GrantFiled: December 5, 2017Date of Patent: March 24, 2020Assignee: GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Nan Ei Yu, Bok Hyeon Kim
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Publication number: 20180157039Abstract: Disclosed are a laser light source device for a head-up display and a head-up display system using the same, the laser light source device for the head-up display including a plurality of light sources which emit laser light and a condensing unit which condenses the laser light emitted from the light sources, is connected to an image forming unit that generates an image for displaying information on a vehicle operation using the laser light, and provides the condensed laser light to the image forming unit. The laser light source device for the head-up display according to the present disclosure and the head-up display system using the same have advantages that optical alignment is not easily destroyed even under harsh operating environment such as a vehicle where considerable vibration and temperature change are introduced, because the whole part of the condensing unit is optically connected by the optical fibers with a high stability on the contrary to a conventional bulk-optic based system.Type: ApplicationFiled: December 5, 2017Publication date: June 7, 2018Inventors: Nan Ei Yu, Bok Hyeon Kim
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Patent number: 8275009Abstract: The present invention relates to a green laser generation device which can be applied to a cellular phone, and more particularly to a green laser generation device which is ultra compact in size having volume of 1 cc or less, despite having a built-in thermo electric cooler, and has sufficient output power, despite having low power consumption, and a portable electronic machine having a laser projection display using the said device. The present invention provides a green laser generation device comprising an LD pump constituted by a photo diode; a fundamental generator generating infrared light laser according to the driving of the LD pump; a second harmonic generator generating green light using the generated infrared light laser; a polarization maintenance unit inserted between the fundamental generator and the second harmonic generator to maintain the polarization of the laser; and a temperature controller controlling an internal temperature of the green laser generation device.Type: GrantFiled: October 13, 2008Date of Patent: September 25, 2012Assignee: Gwangju Institute of Science and TechnologyInventors: Nan-Ei Yu, Do-Kyeong Ko, Chang-Soo Jung, Yeung-Lak Lee, Bong-Ahn Yu, Jeong-Soo Kim
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Publication number: 20100290488Abstract: The present invention relates to a green laser generation device which can be applied to a cellular phone, and more particularly to a green laser generation device which is ultra compact in size having volume of 1 cc or less, despite having a built-in thermo electric cooler, and has sufficient output power, despite having low power consumption, and a portable electronic machine having a laser projection display using the said device. The present invention provides a green laser generation device comprising an LD pump constituted by a photo diode; a fundamental generator generating infrared light laser according to the driving of the LD pump; a second harmonic generator generating green light using the generated infrared light laser; a polarization maintenance unit inserted between the fundamental generator and the second harmonic generator to maintain the polarization of the laser; and a temperature controller controlling an internal temperature of the green laser generation device.Type: ApplicationFiled: October 13, 2008Publication date: November 18, 2010Applicant: GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Do-Kyung Ko, Nan-Ei Yu, Chang-Soo Jung, Yeung-Lak Lee, Bong-Ahn Yu