知搜-全球专利检索

  1. Login
  2. Sign Up

Search Results

12 records (took 0.015 seconds)

    Quantum key distribution system and operation method thereof
    1.
    发明授权
    Quantum key distribution system and operation method thereof 有权

    公开(公告)号：US11770245B2

    公开(公告)日：2023-09-26

    申请号：US17488955

    申请日：2021-09-29

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

    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.

    Waveguide photodetector
    2.
    发明授权
    Waveguide photodetector 有权

    公开(公告)号：US11500150B2

    公开(公告)日：2022-11-15

    申请号：US17173681

    申请日：2021-02-11

    Applicant: Electronics and Telecommunications Research Institute

    Inventor： Joong-Seon Choe ,  Duk Jun Kim ,  Jong-Hoi Kim ,  Jonghyurk Park ,  Won Seok Han

    IPC: G02B6/12 ,  G02B6/42 ,  G02B6/122

    Abstract: Provided is a waveguide photodetector including a semiconductor substrate, a first optical waveguide and a second optical waveguide, which are sequentially laminated on the semiconductor substrate, in which each of the first optical waveguide and the second optical waveguide includes a first portion and a second portion, and the first portion extends from the second portion in a first direction parallel to a top surface of the semiconductor substrate, a refractive index matching layer disposed on the second portion of the second optical waveguide, a clad layer disposed on the refractive index matching layer, and an absorber disposed between the refractive index matching layer and the clad layer. Here, the second optical waveguide has a first conductive-type, the clad layer has a second conductive-type opposite to the first conductive-type, and the refractive index matching layer includes a first semiconductor layer that is an intrinsic semiconductor layer.

    Apparatus and method for measuring IQ imbalance for optical receiver
    3.
    发明授权
    Apparatus and method for measuring IQ imbalance for optical receiver 有权
    用于测量光接收机IQ不平衡的装置和方法

    公开(公告)号：US09166680B2

    公开(公告)日：2015-10-20

    申请号：US14027445

    申请日：2013-09-16

    Applicant: Electronics and Telecommunications Research Institute

    Inventor： Chun Ju Youn ,  Jong-Hoi Kim ,  Joong-Seon Choe ,  Duk Jun Kim ,  Yong-Hwan Kwon ,  Eun Soo Nam

    IPC: H04B10/073 ,  H04B10/61 ,  H04L27/22 ,  H04L27/36 ,  H04L27/00

    CPC classification number: H04B10/0731 ,  H04B10/613 ,  H04L27/223 ,  H04L27/364 ,  H04L2027/0083

    Abstract: Provided is an apparatus and method for measuring IQ imbalance, and in particular, is an apparatus and method for measuring IQ imbalance for an optical receiver. The apparatus for measuring IQ imbalance for an optical receiver includes a light generating unit generating optical and reference signals to provide the optical and reference signals to an optical receiver, a graph creating unit creating a Lissajous figure by using an in-phase (I) signal and a quadrature-phase (Q) signal output from the optical receiver in response to the optical and reference signals, and a calculating unit calculating IQ imbalance for the optical receiver with reference to the Lissajous figure.

    Abstract translation: 提供了一种用于测量IQ不平衡的装置和方法，特别是用于测量光接收机的IQ不平衡的装置和方法。 用于测量光接收机的IQ不平衡的装置包括产生光学和参考信号以向光学接收器提供光学参考信号的光产生单元，通过使用同相（I）信号产生李萨如图的图形创建单元 以及响应于光学参考信号从光学接收器输出的正交相位（Q）信号，以及计算单元，参考利萨如图来计算光学接收机的IQ不平衡。

    Polarization decomposition device
    4.
    发明授权
    Polarization decomposition device 有权

    公开(公告)号：US11860376B2

    公开(公告)日：2024-01-02

    申请号：US16415708

    申请日：2019-05-17

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

    Inventor： Kap-Joong Kim ,  Chun Ju Youn ,  Heasin Ko ,  Byung-Seok Choi ,  Joong-Seon Choe

    IPC: G02B27/28 ,  H04K1/08

    CPC classification number: G02B27/283 ,  G02B27/286 ,  H04K1/08

    Abstract: Provided is a polarization decomposition device. The polarization decomposition device includes a polarization beam splitter configured to split an optical signal into a first polarized light having a first polarization direction and a second polarized light having a second polarization direction different from the first polarized light, a phase shifter configured to delay a phase of the first polarized light, a polarization rotator configured to rotate the second polarized light so that the polarization direction of the second polarized light is changed, and an interference beam splitter configured to allow the first polarized light in which the phase is delayed and the second polarized light in which the polarization direction is rotated to interfere with each other and split them into a third polarized light and a fourth polarized light.

    Apparatus for measuring performance of coherent optical receiver
    5.
    发明授权
    Apparatus for measuring performance of coherent optical receiver 有权
    用于测量相干光接收机性能的装置

    公开(公告)号：US08929731B2

    公开(公告)日：2015-01-06

    申请号：US13687741

    申请日：2012-11-28

    Applicant: Electronics and Telecommunications Research Institute

    Inventor： Chun Ju Youn ,  Joong-Seon Choe ,  Jong-Hoi Kim ,  Duk Jun Kim ,  Yong-Hwan Kwon ,  Eun Soo Nam

    IPC: H04B10/08 ,  H04B17/00 ,  H04B10/06 ,  H04B10/61 ,  H04B10/079

    CPC classification number: H04B10/614 ,  H04B10/0799

    Abstract: An apparatus for measuring performance of a coherent optical receiver includes a beam splitter splitting light into first and second paths, a first optical modulator modulating the first path light, a variable optical attenuator controlling an optical power of the first optical modulator, a first polarization controller transmitting a signal controlling polarization of an output of the variable optical attenuator to the coherent optical receiver, a second optical modulator modulating the second path light, a variable optical delay line delaying time of an output of the second optical modulator, a second polarization controller transmitting a signal controlling polarization of an output of the variable optical delay line to the coherent optical receiver, a network analyzer measuring performance of the coherent optical receiver and controlling the optical modulators, and a controller transmitting a control signal to the optical modulators.

    Abstract translation: 一种用于测量相干光接收机性能的装置，包括将光分成第一和第二路径的光束分配器，调制第一路径光的第一光调制器，控制第一光调制器的光功率的可变光衰减器，第一偏振控制器 将所述可变光衰减器的输出的偏振信号控制到所述相干光接收器，调制所述第二路径光的第二光调制器，所述第二光调制器的输出的可变光延迟线延迟时间，第二偏振控制器发送 控制可变光延迟线到相干光接收机的输出的偏振的信号，测量相干光接收机的性能并控制光调制器的网络分析仪，以及向光调制器发送控制信号的控制器。

    Optical alignment device
    8.
    发明授权
    Optical alignment device 有权

    公开(公告)号：US12228777B2

    公开(公告)日：2025-02-18

    申请号：US18079973

    申请日：2022-12-13

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

    Inventor： Joong-Seon Choe ,  Duk Jun Kim ,  Chun Ju Youn

    IPC: G02B6/42

    Abstract: An optical alignment device according to an embodiment of the inventive concept includes an optical alignment plate having a first hole and at least one second hole, in which the first hole and the second hole pass through the optical alignment plate, and an optical detection element disposed on the optical alignment plate. Here, the optical detection element includes a substrate having a first surface and a second surface, which face each other, a lens disposed on the first surface, and an optical sensor disposed on the second surface, and the optical detection element vertically overlaps the first hole and the second hole. The lens is exposed to the outside by the first hole, and the second hole is connected with a vacuum suction unit to fix the optical detection element to the optical alignment plate.

Patent Agency Ranking