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    WAVEGUIDE PHOTODETECTOR
    2.
    发明申请
    WAVEGUIDE PHOTODETECTOR 有权

    公开(公告)号：US20210255385A1

    公开(公告)日：2021-08-19

    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 ,  H01L31/0232

    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.

    COHERENT OPTICAL RECEIVER AND FABRICATION METHOD THEREOF
    3.
    发明申请
    COHERENT OPTICAL RECEIVER AND FABRICATION METHOD THEREOF 有权

    公开(公告)号：US20210044359A1

    公开(公告)日：2021-02-11

    申请号：US16846948

    申请日：2020-04-13

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

    Inventor： Seo Young LEE ,  Young-Tak HAN ,  Jong-Hoi KIM

    IPC: H04B10/61

    Abstract: Provided are a coherent optical receiver and a fabrication method thereof, the coherent optical receiver including a substrate, signal and local input waveguides extending in a first direction parallel to a top surface of the substrate and configured to receive an optical signal, a first optical circuit element including a first optical waveguide connected to the signal input waveguide and a trench provided in one side of the first optical waveguide in parallel to the first direction, a second optical circuit element including a second optical waveguide connected to the first optical waveguide, a slit crossing the second optical waveguide, and a wavelength plate inserted to the slit, and third optical circuit elements connected to the second optical circuit element, wherein the first to third optical circuit elements are monolithically integrated in the substrate.

    APPARATUS AND METHOD FOR MEASURING IQ IMBALANCE FOR OPTICAL RECEIVER
    5.
    发明申请
    APPARATUS AND METHOD FOR MEASURING IQ IMBALANCE FOR OPTICAL RECEIVER 有权
    用于测量光接收机智能不平等的装置和方法

    公开(公告)号：US20140169786A1

    公开(公告)日：2014-06-19

    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: H04B10/077

    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）信号产生李萨诸图形的图形创建单元 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。

    OPTICAL RECEIVER WITH SEPARATED MAGNITUDE MODULATION AND PHASE MODULATION AND OPERATION METHOD THEREOF
    7.
    发明申请
    OPTICAL RECEIVER WITH SEPARATED MAGNITUDE MODULATION AND PHASE MODULATION AND OPERATION METHOD THEREOF 有权

    公开(公告)号：US20210266074A1

    公开(公告)日：2021-08-26

    申请号：US17185484

    申请日：2021-02-25

    Applicant: Electronics and Telecommunications Research Institute

    Inventor： Jong-Hoi KIM

    IPC: H04B10/69 ,  H04B10/67

    Abstract: Disclosed is an optical receiver. The optical receiver includes an optical splitter that splits an external light signal to output a first light signal and a second light signal, a first amplifier that amplifies the first light signal in a linear gain section to output an amplified first light signal, a second amplifier that amplifies the second light signal in a saturation gain section to output an amplified second light signal, a polarization division hybrid that outputs an in-phase hybrid light signal and a quadrature-phase hybrid light signal, based on a reference light signal and the amplified second light signal, and an optoelectronic conversion unit that outputs an electrical signal, based on the amplified first light signal, the in-phase hybrid light signal, and the quadrature-phase hybrid light signal.

    MULTI-CHANNEL PHOTORECEIVER MODULE
    9.
    发明申请
    MULTI-CHANNEL PHOTORECEIVER MODULE 有权
    多通道光电模块

    公开(公告)号：US20140147131A1

    公开(公告)日：2014-05-29

    申请号：US13839013

    申请日：2013-03-15

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

    Inventor： Jong-Hoi KIM

    IPC: H04B10/60

    CPC classification number: H04B10/61 ,  G02B6/12004 ,  G02B6/12007 ,  G02B6/125 ,  G02B6/2813

    Abstract: Provide an optical receiver module. The optical receiver module includes: an optical fiber array including a first optical fiber that delivers an optical signal and a second optical fiber that delivers a reference optical signal; a plate optical integrated circuit including first and second multi mode interference (MMI) optical isolators respectively receiving the optical signal and the reference optical signal through a plurality of first optical waveguides; and an optical detector array receiving two optical signals from each of the first and second MMI optical isolators through a plurality of second optical waveguides, wherein the optical detector array includes a plurality of third optical waveguides aligned to be connected to the other end of each of the plurality of second optical waveguides in one-to-one correspondence.

    Abstract translation: 提供光接收模块。 光接收模块包括：光纤阵列，包括传送光信号的第一光纤和传送参考光信号的第二光纤; 包括通过多个第一光波导分别接收光信号和参考光信号的第一和第二多模干涉（MMI）光隔离器的平板光集成电路; 以及光学检测器阵列，其通过多个第二光波导从所述第一和第二MMI光隔离器中的每一个接收两个光信号，其中所述光检测器阵列包括多个第三光波导，所述第三光波导被对准以连接到每个的另一端 所述多个第二光波导以一对一的对应关系。

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