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    COHERENT/IM-DD DUAL OPERATION OPTICAL TRANSCEIVER
    1.
    发明申请
    COHERENT/IM-DD DUAL OPERATION OPTICAL TRANSCEIVER 审中-公开

    公开(公告)号：US20200280372A1

    公开(公告)日：2020-09-03

    申请号：US16517151

    申请日：2019-07-19

    Applicant: Google LLC

    Inventor： Wenzao Li ,  Ryohei Urata ,  Xiang Zhou ,  Lieven Verslegers

    IPC: H04B10/50 ,  H04B10/40 ,  H01S3/10 ,  H01S3/105 ,  H01S3/106 ,  H01S5/00

    Abstract: A dual-mode optical transceiver is disclosed. The dual-mode optical transceiver includes a receiver section configured to receive both coherently modulated and intensity modulated optical signals and to be optically switched between a first receiver mode for direct detection and a second receiver mode for coherent detection, and a transmitter section including a nested Mach-Zehnder Modulator or a polarization multiplexed quad Mach-Zehnder Modulator configured to be operated in a first transmission mode to output an intensity modulated optical signal and a second transmission mode to output a coherently modulated optical signal. In some implementations, the dual-mode optical receiver includes an optical switch configured to selectively direct a received optical signal down a direct detection optical circuit or a coherent detection optical circuit based on a control signal applied to the optical switch.

    Fixture And Method For Attaching Fibers To V-Grooves Of Photonic Integrated Circuit
    3.
    发明申请
    Fixture And Method For Attaching Fibers To V-Grooves Of Photonic Integrated Circuit 有权

    公开(公告)号：US20220413234A1

    公开(公告)日：2022-12-29

    申请号：US17358314

    申请日：2021-06-25

    Applicant: Google LLC

    Inventor： Daoyi Wang ,  Ryohei Urata ,  Lieven Verslegers ,  Jan Petykiewicz

    IPC: G02B6/42 ,  G02B6/30 ,  G02B6/12

    Abstract: A system for passive alignment of fibers to an interface of a photonic integrated circuit (PIC) includes an input frame, an actuator, and an output frame. The actuator arranged to apply force along a force axis to the input frame. The output frame including a tip for picking up a plate and transferring the force thereto, the output frame being connected to the input frame such that the output frame may tilt relative to the input frame and the output frame is elastically biased relative to the input frame into a position wherein the tip is aligned on the force axis.

    Laser Light Source Co-Packaged with Photonic Integrated Circuit and Substrate
    4.
    发明申请
    Laser Light Source Co-Packaged with Photonic Integrated Circuit and Substrate 有权

    公开(公告)号：US20220104342A1

    公开(公告)日：2022-03-31

    申请号：US17034867

    申请日：2020-09-28

    Applicant: Google LLC

    Inventor： Lieven Verslegers ,  Hong Liu ,  Kevin Yasumura ,  Jill Berger ,  Ryohei Urata

    IPC: H05K1/02

    Abstract: The present disclosure provides for an example integrated optics assembly. The integrated optics assembly may include an optics mount, a substrate including a heat sink, and a photonic integrated circuit (“PIC”). The optics mount may be adapted to support a light source on a first end of the optics mount. The first end of the optics mount may be coupled to a region of the substrate including the heat sink. The heat sink may remove or dissipate the heat produced by the light source. A second end of the optics mount may be coupled to the PIC such that the optics mount extends between the substrate and the PIC. This may decrease the amount of space the optics mount takes up on the PIC thereby allowing the overall size of the PIC to be decreased. Decreasing the size of the PIC may allow for more PICS per wafer.

    OPTICAL EQUALIZATION METHOD FOR DIRECT DETECTION OPTICAL COMMUNICATION SYSTEMS
    6.
    发明申请
    OPTICAL EQUALIZATION METHOD FOR DIRECT DETECTION OPTICAL COMMUNICATION SYSTEMS 审中-公开

    公开(公告)号：US20200162165A1

    公开(公告)日：2020-05-21

    申请号：US16358200

    申请日：2019-03-19

    Applicant: Google LLC

    Inventor： Xiang Zhou ,  Lieven Verslegers ,  Hong Liu ,  Ryohei Urata

    IPC: H04B10/516 ,  H04L25/03

    Abstract: Systems and methods of transmitting direct detection optical signal are provided. A direct detection optical transmitter according to illustrative embodiments includes a Mach Zehnder Modulator (MZM) configured to modulate laser light based on an electrical drive signal to generate a modulated optical signal and a complementary-modulated optical signal. The optical transmitter includes an optical finite impulse response (FIR) filter configured to receive the complementary-modulated optical signal and generate a filtered optical signal. The optical transmitter includes a polarization rotator configured to receive the filtered optical signal and output a rotated optical signal. The optical transmitter includes an optical combiner configured to combine the modulated optical signal and the rotated optical signal. The optical transmitter includes an output port configured to output the combined optical signal.

    POLARIZATION DISPERSION MITIGATION
    7.
    发明申请
    POLARIZATION DISPERSION MITIGATION 审中-公开

    公开(公告)号：US20190107673A1

    公开(公告)日：2019-04-11

    申请号：US16131594

    申请日：2018-09-14

    Applicant: Google LLC

    Inventor： Lieven Verslegers ,  Mohammad Sotoodeh ,  Ryohei Urata

    IPC: G02B6/126 ,  G02B6/122

    Abstract: Silicon-on-insulator photonic integrated circuits (PICs) are provided. A PIC can include a silicon dioxide substrate surrounding a silicon waveguide. The silicon waveguide has a thickness between an upper side and a lower side and a width between lateral sides. The thickness and width can be set such that a first group index of a lowest-order TE mode of an optical signal is approximately equal to a second group index of a lowest-order TM mode of the optical signal.

    INTEGRATED HEATER STRUCTURES IN A PHOTONIC INTEGRATED CIRCUIT FOR SOLDER ATTACHMENT APPLICATIONS
    9.
    发明申请
    INTEGRATED HEATER STRUCTURES IN A PHOTONIC INTEGRATED CIRCUIT FOR SOLDER ATTACHMENT APPLICATIONS 审中-公开

    公开(公告)号：US20200310053A1

    公开(公告)日：2020-10-01

    申请号：US16371800

    申请日：2019-04-01

    Applicant: Google LLC

    Inventor： Kevin Yasumura ,  Lieven Verslegers ,  Jill Berger

    IPC: G02B6/42 ,  G02B6/34 ,  B23K1/00 ,  H05B3/03 ,  H05B3/12

    Abstract: An apparatus including a photonic integrated circuit (PIC) coupled to an optical bench is disclosed. The PIC includes at least one grating coupler disposed thereon and the optical bench includes an optical system disposed thereon. The apparatus also includes an integrated heater at an upper surface of the PIC under the optical bench or at a bottom surface of the optical bench over the PIC. The apparatus also includes a layer of solder disposed between the PIC and the optical bench for coupling the bottom surface of the optical bench to the PIC. In some implementations, the layer of solder is in thermal communication with the integrated heater.

    Device and method for coupling laser to a photonic integrated circuit
    10.
    发明授权
    Device and method for coupling laser to a photonic integrated circuit 有权

    公开(公告)号：US10788632B2

    公开(公告)日：2020-09-29

    申请号：US16261211

    申请日：2019-01-29

    Applicant: Google LLC

    Inventor： Daoyi Wang ,  Lieven Verslegers ,  Ryohei Urata

    IPC: G02B6/42

    Abstract: A photonic integrated circuit for coupling a laser from an optical assembly to a grating coupler is disclosed. A method for coupling a laser to a photonic integrated circuit is disclosed. The optical assembly includes an optical system disposed on a v-groove bench. The optical system typically includes a laser source, a coupling lens or lens system, an optional isolator, a beam redirector that includes a prism or other light turning element and a cylindrical tube mounted on the v-groove bench. The method of tuning the angle of incidence from the optical assembly to the grating coupler is also disclosed.

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