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公开(公告)号：US11770245B2
公开(公告)日：2023-09-26
申请号：US17488955
申请日：2021-09-29
发明人： Kyongchun Lim , Chun Ju Youn , Byung-seok Choi , Young-Ho Ko , Kap-Joong Kim , Minchul Kim , Ju Hee Baek , Joong-Seon Choe
IPC分类号： H04L9/08
CPC分类号： H04L9/0855 , H04L9/0825 , H04L9/0858
摘要： Disclosed is a quantum key distribution system using an RFI (reference frame independent) QKD (quantum key distribution) protocol, which includes a first signal processing circuit that generates transmission basis information and transmission bit information, a quantum channel transmitter that generates a single photon or coherent light, and modulates the single photon or the coherent light based on the transmission basis information and the transmission bit information to generate a quantum signal, a quantum channel receiver that receives the quantum signal through a quantum channel and detects reception bit information from the quantum signal based on reception basis information, and a second signal processing circuit that generates the reception basis information, transmits the reception basis information to the first signal processing circuit through a public channel, and receives the transmission basis information from the first signal processing circuit through the public channel.
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公开(公告)号：US08995480B2
公开(公告)日：2015-03-31
申请号：US13676760
申请日：2012-11-14
发明人： Ki-Hong Yoon , O-Kyun Kwon , Su Hwan Oh , Kisoo Kim , Byung-seok Choi , Hyun Soo Kim
IPC分类号： H01S3/10 , H01S5/14 , H01S3/1055 , H01S5/06 , H01S5/40
CPC分类号： H01S3/10 , H01S3/1055 , H01S5/0612 , H01S5/142 , H01S5/4006
摘要： The present disclosure relates to a tunable laser module including a light gain area unit for outputting an optical signal; an optical distributor for separating the optical signal output from the light gain area unit; two comb reflection units for reflecting a part of optical signals separated by the optical distributor and allow a part of the optical signals to penetrate; two phase units for changing phases of the optical signals penetrating the two comb reflection units; an optical coupler for combining the optical signals of which the phases are changed by the two phase units; and an optical amplifier for amplifying the optical signal combined by the optical coupler, wherein the light gain area unit oscillates a laser by totally reflecting the optical signals reflected by the two comb reflection units.
摘要翻译： 本发明涉及一种包括用于输出光信号的光增益区单元的可调谐激光模块; 光分配器，用于分离从光增益区单元输出的光信号; 两个梳状反射单元，用于反射由光学分配器分离的光信号的一部分，并允许光信号的一部分穿透; 两相单元，用于改变穿过两个梳状反射单元的光信号的相位; 光耦合器，用于组合相位由两相单元改变的光信号; 以及光放大器，用于放大由光耦合器组合的光信号，其中光增益区单元通过全反射由两个梳状反射单元反射的光信号来振荡激光。
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公开(公告)号：US11594656B2
公开(公告)日：2023-02-28
申请号：US17075966
申请日：2020-10-21
发明人： Young-Ho Ko , Kap-Joong Kim , Byung-seok Choi , Won Seok Han
摘要： Disclosed are a quantum light source and an optical communication apparatus including the same. The quantum light source device includes a vertical reflection layer disposed on a substrate, a lower electrode layer disposed on the vertical reflection layer, a horizontal reflection layer disposed on the lower electrode layer, a quantum light source disposed in the horizontal reflection layer, and an upper electrode layer disposed on the horizontal reflection layer.
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公开(公告)号：US20240168307A1
公开(公告)日：2024-05-23
申请号：US18516066
申请日：2023-11-21
发明人： Kap Joong KIM , Chun Ju Youn , Young-Ho Ko , Minchul Kim , Seong Su Park , Kyongchun Lim , Byung-seok Choi , Joong-Seon Choe , Won Seok Han
IPC分类号： G02B27/28
CPC分类号： G02B27/283 , G02B27/286
摘要： Disclosed is a polarized light generating device based on an optical waveguide, which includes first to fourth input optical waveguides, respectively, for receiving input light from an outside, first to fifth optical splitters configured to receive at least one light and output the received at least one light as at least one light, and an optical converter configured to receive at least one light from the fifth optical splitter and convert the received light to generate polarized light. The polarized light generating device receives the input light through one of the first to fourth input optical waveguides, and generates a first polarized light, a second polarized light, a third polarized light, and a fourth polarized light. The first to fourth polarized lights belong to elements of two arbitrary two-dimensional mutually unbiased basis sets.
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公开(公告)号：US11522618B2
公开(公告)日：2022-12-06
申请号：US17203186
申请日：2021-03-16
发明人： Kyongchun Lim , Chun Ju Youn , Young-Ho Ko , Kap Joong Kim , Minchul Kim , Byung-seok Choi , Joong-Seon Choe
摘要： Disclosed are a quantum information transmitter, a quantum communication system including the same, and an operating method of the quantum information transmitter. The quantum information transmitter includes a light source driver, a light source, and a light modulator. The light source driver generates a first light source driving signal having a first level and a second light source driving signal having a second level. The light source generates a first light signal having a first average number of photons in response to the first light source driving signal, and generates a second light signal having a second average number of photons in response to the second light source driving signal. The optical modulator modulates the first light signal to generate a target signal, and modulates the second light signal to generate a decoy signal.
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公开(公告)号：US20190162986A1
公开(公告)日：2019-05-30
申请号：US16184495
申请日：2018-11-08
发明人： Joong-Seon Choe , Chun Ju Youn , Heasin Ko , Kap-Joong Kim , Byung-seok Choi
摘要： Provided is an apparatus configured to split light into a plurality of polarizations, the apparatus including an input waveguide configured to receive the light, a first interferometer configured to split the light into a first polarization and a second polarization, and a second interferometer configured to split the light into a third polarization and a fourth polarization, wherein the first interferometer and the second interferometer are connected in parallel, the first interferometer comprises a first output waveguide configured to output the first polarization, and a second output waveguide configured to output the second polarization, and the second interferometer comprises a third output waveguide configured to output the third polarization, and a fourth output waveguide configured to output the fourth polarization.
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