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    Silicon photonics-based optical modulator
    1.
    发明授权
    Silicon photonics-based optical modulator 有权

    公开(公告)号：US11899334B2

    公开(公告)日：2024-02-13

    申请号：US17545063

    申请日：2021-12-08

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

    Inventor： Sanghwa Yoo ,  Sooyeon Kim ,  Heuk Park ,  Jyung Chan Lee ,  Joon Ki Lee

    IPC: G02F1/225 ,  G02F1/01

    CPC classification number: G02F1/2257 ,  G02F1/0123 ,  G02F2202/105

    Abstract: A silicon photonics-based optical modulator is disclosed. The optical modulator includes first radio frequency (RF) metal electrodes that operate as a ground, phase shifters disposed between the first RF metal electrodes for optically modulating an optical signal transmitted along an optical waveguide, second RF metal electrodes disposed between the phase shifters for providing an RF electrical signal received from a driving driver located outside of the optical modulator through one end, resistor-inductors (RL) connected to another end of the second RF metal electrodes, an inductive line disposed between the RLs and a power supply for applying a bias voltage to the optical modulator and the driving driver, and a silicon capacitor disposed between the RLs and the power supply for preventing a degradation of an RF response characteristic of the silicon photonics-based optical modulator caused by the inductive line.

    Silicon photonics-based optical transmission apparatus
    2.
    发明授权
    Silicon photonics-based optical transmission apparatus 有权

    公开(公告)号：US11429006B2

    公开(公告)日：2022-08-30

    申请号：US17377658

    申请日：2021-07-16

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

    Inventor： Sanghwa Yoo ,  Heuk Park ,  Joon Ki Lee

    IPC: G02F1/21 ,  G02F1/225

    Abstract: Disclosed is a silicon photonics-based optical transmission apparatus. The apparatus includes an optical modulator chip of a ground-signal-ground (GSG) electrode array including two phase shifters for differential driving, a sub-substrate including a metal electrode of a periodic pattern to connect two ground metal electrodes to each other at a GSG electrode connected to each of the two phase shifters, and a solder bump having a same periodic pattern as the metal electrode of the sub-substrate to connect the ground metal electrodes of the optical modulator chip and the metal electrode of the periodic pattern of the sub-substrate.

    Silicon-based optical modulator
    5.
    发明授权
    Silicon-based optical modulator 有权

    公开(公告)号：US11307481B2

    公开(公告)日：2022-04-19

    申请号：US16889086

    申请日：2020-06-01

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

    Inventor： Sanghwa Yoo ,  Joon Ki Lee

    IPC: G02F1/225 ,  G02F1/025

    Abstract: A silicon-based optical modulator. An optical modulator of a Mach-Zehnder type includes an optical coupler configured to separate a single optical signal into two optical signals having same output power, two phase shifters having a PN junction through which the two optical signals separated through the optical coupler pass respectively, a plurality of electrodes configured to apply an electrical signal to the two phase shifters, and two PN diodes disposed between the two phase shifters and configured to adjust an operating bandwidth of the optical modulator. The optical signals respectively passing through the two phase shifters have phases that change as a width of a depletion region changes based on a magnitude of a reverse voltage provided to the two phase shifters through the electrodes and a refractive index changes.

    Bidirectional optical transceiver module
    7.
    发明授权
    Bidirectional optical transceiver module 有权

    公开(公告)号：US11411651B2

    公开(公告)日：2022-08-09

    申请号：US17204341

    申请日：2021-03-17

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

    Inventor： Joon Young Huh ,  Sae-Kyoung Kang ,  Sanghwa Yoo

    IPC: H04B10/00 ,  H04B10/40 ,  G02B1/11 ,  H05K9/00 ,  G02B27/30

    Abstract: A bidirectional optical transceiver module includes an optical Tx block including a light source configured to output an optical Tx signal; an optical Rx block provided in parallel to the optical Tx block and including a PD configured to receive an optical Rx signal; a wavelength distributor configured to change a travel path of the optical Tx signal; an optical filter provided on a predetermined area of a first surface of the wavelength distributor adjacent to the optical Tx or Rx block and configured to transmit the optical Rx signal and reflect the optical Tx signal; a first lens provided between the optical Tx block and the wavelength distributor; a second lens provided between the optical Rx block and the wavelength distributor; and a third lens configured to output the optical Tx signal to outside and output the optical Rx signal from the outside to the wavelength distributor.

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