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    OPTICAL TRANSCEIVER AND METHOD OF SETTING WAVELENGTH OF OPTICAL TRANSCEIVER
    21.
    发明申请
    OPTICAL TRANSCEIVER AND METHOD OF SETTING WAVELENGTH OF OPTICAL TRANSCEIVER 有权

    公开(公告)号：US20210273406A1

    公开(公告)日：2021-09-02

    申请号：US16907682

    申请日：2020-06-22

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

    Inventor： Jie Hyun Lee ,  Sae-Kyoung Kang ,  Joon Ki Lee ,  Sun Hyok Chang ,  Joon Young Huh

    IPC: H01S5/06 ,  H01S5/40 ,  H01S5/0687 ,  H04B10/40 ,  H04B10/50

    Abstract: An optical transceiver and a method of setting a wavelength of the optical transceiver. The optical transceiver may include a thermoelectric cooler (TEC) configured to maintain a constant operating temperature of a transmitter optical sub-assembly (TOSA) of the optical transceiver based on an installation environment of the optical transceiver, a plurality of laser diodes arranged on the top of the TEC and configured to output optical signals having different wavelengths, an optical multiplexer configured to multiplex the optical signals having different wavelengths, output through the plurality of laser diodes, and a wavelength controller configured to control the wavelengths of the optical signals output through the plurality of laser diodes such that optical outputs of the optical signals having different wavelengths, detected through the optical multiplexer, are maximized, wherein the wavelength controller may be individually arranged in one region of each of the plurality of laser diodes.

    Optical receiver with optical demultiplexer
    23.
    发明授权
    Optical receiver with optical demultiplexer 有权

    公开(公告)号：US10447405B2

    公开(公告)日：2019-10-15

    申请号：US16023145

    申请日：2018-06-29

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

    Inventor： Sae-Kyoung Kang ,  Joon Young Huh ,  Joon Ki Lee ,  Jie Hyun Lee

    IPC: H04B10/69 ,  H04J14/02 ,  H04B10/67

    Abstract: An optical receiver includes: an optical demultiplexer to demultiplex an optical signal in which a plurality of wavelengths is multiplexed and divide the optical signal into optical signals corresponding to the plurality of wavelengths, respectively; a reflector to change a progress direction of the divided optical signals; an optical coupling lens including, in an array form, light transmission lenses through which the divided optical signals are transmitted, respectively; a plurality of photodetectors to mount on a photodiode (PD) substrate provided on the optical coupling lens, receive the divided optical signals that are transmitted through the light transmission lenses of the optical coupling lens, respectively, and convert the received optical signals to electrical signals; and a plurality of trans impedance amplifiers provided at desired intervals to electrically connect to the plurality of photodetectors through wire bonding and amplify the received plurality of electrical signals to be a desired magnitude.

    Test device and test method for DFB-LD for RoF system
    28.
    发明授权
    Test device and test method for DFB-LD for RoF system 有权

    公开(公告)号：US11949453B2

    公开(公告)日：2024-04-02

    申请号：US17846604

    申请日：2022-06-22

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

    Inventor： Seung-Hyun Cho ,  Joon Ki Lee

    IPC: H04B10/07 ,  H04B10/077 ,  H04B10/2575

    CPC classification number: H04B10/2575 ,  H04B10/077 ,  H04B10/07

    Abstract: A test device and method for testing a distributed feedback laser diode (DFB-LD) device for an optical transceiver of a radio over fiber (RoF) system examines the DFB-LD device based on an absolute limiting rating, an operating case environment, and a functional specification, in which the absolute limiting rating is a rating at which there is no fatal damage to the DFB-LD device during a short period of time when each limiting parameter is isolated and all other parameters are in a normal performance parameter, the operating case environment includes an operating temperature, and the functional specification includes parameters to be tested according to an operating condition for the functional specification.

    Interleaved wideband memory access method using optical switch, and server for performing the same
    29.
    发明授权
    Interleaved wideband memory access method using optical switch, and server for performing the same 有权

    公开(公告)号：US11868251B2

    公开(公告)日：2024-01-09

    申请号：US17858187

    申请日：2022-07-06

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

    Inventor： Jongtae Song ,  Daeub Kim ,  Ji Wook Youn ,  Kyeong-Eun Han ,  Joon Ki Lee

    IPC: G06F12/06

    CPC classification number: G06F12/0607

    Abstract: Provided are a memory access method and a server for performing the same. A memory access method performed by an optical interleaver included in a server includes receiving a request message from a requester processing engine included in the server, setting receiving buffers corresponding to different wavelengths corresponding to the number of external memory/storage devices connected to the server, multiplexing the same request message at the different wavelengths according to a wavelength division multiplexing (WDM) scheme, and transmitting the multiplexed request messages to the respective external memory/storage devices, wherein an address of a virtual memory managed by the server is separated and stored according to an interleaving scheme by a responder included in each of the external memory/storage devices.

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