-
公开(公告)号：US11770245B2
公开(公告)日：2023-09-26
申请号：US17488955
申请日：2021-09-29
Inventor： Kyongchun Lim , Chun Ju Youn , Byung-seok Choi , Young-Ho Ko , Kap-Joong Kim , Minchul Kim , Ju Hee Baek , Joong-Seon Choe
IPC: H04L9/08
CPC classification number: H04L9/0855 , H04L9/0825 , H04L9/0858
Abstract: 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.
-
公开(公告)号：US11703638B2
公开(公告)日：2023-07-18
申请号：US17513820
申请日：2021-10-28
Inventor： Young-Ho Ko , Kap-Joong Kim , Hye Min Kim , Mireu Lee
CPC classification number: G02B6/12004 , H04B10/502 , H04B10/503 , G02B2006/1215 , G02B2006/12121 , G02B2006/12123
Abstract: Provided are a single-photon source device and a single-photon source system including same. The single-photon source device includes a substrate, a straight waveguide extending in a first direction on the substrate, a first coupling layer which is provided on the straight waveguide and has a first point defect, at least one first electrode which is adjacent to the first point defect and provided on the first coupling layer, a ring waveguide which is adjacent to the straight waveguide and provided on the substrate, and at least one second electrode provided on the ring waveguide.
-
公开(公告)号：US11829050B2
公开(公告)日：2023-11-28
申请号：US17903806
申请日：2022-09-06
Inventor： Young-Ho Ko , Mireu Lee
Abstract: An entangled-photon pair emitting device according to an embodiment of the inventive concept includes a piezoelectric structure having a first surface and a second surface, which face each other, wherein the piezoelectric structure includes an opening passing through the piezoelectric structure from the first surface to the second surface, a stress transfer medium that fills the opening, a light source emitting part disposed on the stress transfer medium, an upper electrode disposed on the first surface of the piezoelectric structure, and a lower electrode disposed on the second surface of the piezoelectric structure. Here, the light source emitting part includes a semiconductor thin-film and a quantum dot in the semiconductor thin-film.
-
Patent Agency Ranking
公开(公告)号：US10649139B2
公开(公告)日：2020-05-12
申请号：US16215416
申请日：2018-12-10
Inventor： Duk Jun Kim , Young-Ho Ko , Dong-Young Kim , Jong-Hoi Kim , Yongsoon Baek , Jung-Ho Song , Dong Hyo Lee , Byung-Seok Choi , Won Seok Han
Abstract: An optical waveguide structure includes a substrate and a core structure disposed on the substrate. The substrate includes a first waveguide region, a second waveguide region, and a transition region between the first waveguide region and the second waveguide region. The core structure includes first core segments arranged in a first direction and a second direction crossing the first direction on the transition region. The core structure includes second core segments arranged in the first direction and the second direction on the second waveguide region. The first direction and the second direction are parallel to a top surface of the substrate.
-
公开(公告)号：US20240168307A1
公开(公告)日：2024-05-23
申请号：US18516066
申请日：2023-11-21
Inventor： 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: G02B27/28
CPC classification number: G02B27/283 , G02B27/286
Abstract: 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.
-
公开(公告)号：US20230161222A1
公开(公告)日：2023-05-25
申请号：US17903806
申请日：2022-09-06
Inventor： Young-Ho Ko , Mireu Lee
IPC: G02F1/39 , H01L41/113
CPC classification number: G02F1/39 , H01L41/113
Abstract: An entangled-photon pair emitting device according to an embodiment of the inventive concept includes a piezoelectric structure having a first surface and a second surface, which face each other, wherein the piezoelectric structure includes an opening passing through the piezoelectric structure from the first surface to the second surface, a stress transfer medium that fills the opening, a light source emitting part disposed on the stress transfer medium, an upper electrode disposed on the first surface of the piezoelectric structure, and a lower electrode disposed on the second surface of the piezoelectric structure. Here, the light source emitting part includes a semiconductor thin-film and a quantum dot in the semiconductor thin-film.
-
公开(公告)号：US11522618B2
公开(公告)日：2022-12-06
申请号：US17203186
申请日：2021-03-16
Inventor： Kyongchun Lim , Chun Ju Youn , Young-Ho Ko , Kap Joong Kim , Minchul Kim , Byung-seok Choi , Joong-Seon Choe
Abstract: 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.
-
公开(公告)号：US11594656B2
公开(公告)日：2023-02-28
申请号：US17075966
申请日：2020-10-21
Inventor： Young-Ho Ko , Kap-Joong Kim , Byung-seok Choi , Won Seok Han
Abstract: 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.
-
-
-
-
-
-
-
Search Results
8
records
(took 0.015 seconds)
