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    Method and system for a distributed mach-zehnder interferometer with integrated feed forward equalizer
    51.
    发明授权
    Method and system for a distributed mach-zehnder interferometer with integrated feed forward equalizer 有权

    公开(公告)号：US10782543B2

    公开(公告)日：2020-09-22

    申请号：US16005233

    申请日：2018-06-11

    Applicant: Luxtera, Inc.

    Inventor： Brian Welch ,  Scott Denton ,  Joseph Balardeta ,  Simon Pang

    IPC: H04B10/50 ,  G02F1/01 ,  G02F1/225 ,  G02F1/21

    Abstract: Methods and systems for a distributed Mach-Zehnder Interferometer (MZI) with an integrated feed forward equalizer (FFE) may include a photonic chip comprising an optical modulator having diode drivers, local voltage domain splitters, and delay elements, where each is distributed along a length of the optical modulator. Outputs of the delay elements may be coupled to inputs of the local domain splitters, and outputs of the local voltage domain splitters may be coupled to inputs of the diode drivers. A feed forward equalization (FFE) module comprising a configurable delay element with inverted outputs coupled to one of the delay elements along the length of the modulator, may be coupled to a local voltage domain splitter. An input electrical signal may be received and delayed using the delay elements and coupled to the local domain splitters, and input electrical signals for the diode drivers may be generated using the local domain splitters.

    Method And System For A Polarization Immune Wavelength Division Multiplexing Demultiplexer
    52.
    发明申请
    Method And System For A Polarization Immune Wavelength Division Multiplexing Demultiplexer 审中-公开

    公开(公告)号：US20190342026A1

    公开(公告)日：2019-11-07

    申请号：US16458887

    申请日：2019-07-01

    Applicant: Luxtera, Inc.

    Inventor： Brian Welch

    IPC: H04J14/02 ,  G02B6/293 ,  G02F1/225 ,  G02B6/27 ,  H04B10/516 ,  G02F1/025 ,  G02B6/34 ,  H04B10/40 ,  G02B6/12 ,  G02B6/42 ,  H04B10/80 ,  G02B6/122

    Abstract: Methods and systems for a polarization immune wavelength division multiplexing demultiplexer are disclosed and may include, in an optoelectronic transceiver having an input coupler, a demultiplexer, and an amplitude scrambler: receiving input optical signals via the input coupler, communicating the input optical signals to the amplitude scrambler via waveguides, configuring the average optical power in each of the waveguides utilizing the amplitude scrambler, and demultiplexing the optical signals utilizing the demultiplexer. The amplitude scrambler may include phase modulators and a coupling section. The phase modulators may include sections of P-N junctions in the two waveguides. The demultiplexer may include a Mach-Zehnder Interferometer. The demultiplexed signals may be received utilizing photodetectors. The input coupler may include a polarization splitting grating coupler. The average optical power may be configured above which demultiplexer control circuitry is able to control the demultiplexer to process incoming optical signals.

    Method and system for partial integration of wavelength division multiplexing and bi-directional solutions
    53.
    发明授权
    Method and system for partial integration of wavelength division multiplexing and bi-directional solutions 有权

    公开(公告)号：US10338308B2

    公开(公告)日：2019-07-02

    申请号：US16180725

    申请日：2018-11-05

    Applicant: Luxtera, Inc.

    Inventor： Brian Welch ,  Attila Mekis ,  Steffen Gloeckner

    IPC: H04J14/00 ,  H04J14/02 ,  G02B6/12 ,  G02B6/42 ,  H04B10/80 ,  H04B10/40 ,  G02B6/293 ,  G02B6/125 ,  G02B6/124

    Abstract: Methods and systems for partial integration of wavelength division multiplexing and bi-directional solutions are disclosed and may include, an optical transceiver on a silicon photonics integrated circuit coupled to a planar lightwave circuit (PLC). The silicon photonics integrated circuit may include a first modulator and first light source that operates at a first wavelength and a second modulator and second light source that operates at a second wavelength. The transceiver and PLC are operable to modulate a first continuous wave (CW) optical signal from the first light source utilizing the first modulator and modulate a second CW optical signal from the second light source utilizing the second modulator. The modulated signals may be communicated from the modulators to the PLC utilizing a first pair of grating couplers in the IC and combined in the PLC.

    Method And System For Split Voltage Domain Receiver Circuits
    54.
    发明申请
    Method And System For Split Voltage Domain Receiver Circuits 审中-公开

    公开(公告)号：US20190007241A1

    公开(公告)日：2019-01-03

    申请号：US16105567

    申请日：2018-08-20

    Applicant: Luxtera, Inc.

    Inventor： Brian Welch

    IPC: H04L25/06 ,  H04L25/02 ,  H04B10/69 ,  H04B10/60 ,  H04B10/564 ,  H04B10/50 ,  H04B10/516 ,  G02B6/42

    Abstract: Methods and systems for split voltage domain receiver circuits are disclosed and may include amplifying complementary received signals in a plurality of partial voltage domains. The signals may be combined into a single differential signal in a single voltage domain. Each of the partial voltage domains may be offset by a DC voltage from the other partial voltage domains. The sum of the partial domains may be equal to a supply voltage of the integrated circuit. The complementary signals may be received from a photodiode. The amplified received signals may be amplified via stacked common source amplifiers, common emitter amplifiers, or stacked inverters. The amplified received signals may be DC coupled prior to combining. The complementary received signals may be amplified and combined via cascode amplifiers. The voltage domains may be stacked, and may be controlled via feedback loops. The photodetector may be integrated in the integrated circuit.

    Method and system for split voltage domain receiver circuits
    55.
    发明授权
    Method and system for split voltage domain receiver circuits 有权

    公开(公告)号：US10057091B2

    公开(公告)日：2018-08-21

    申请号：US15785066

    申请日：2017-10-16

    Applicant: Luxtera, Inc.

    Inventor： Brian Welch

    IPC: H04B10/00 ,  H04L25/06 ,  H04B10/69 ,  H04J14/00

    CPC classification number: H04L25/061 ,  G02B6/4201 ,  G02B6/4242 ,  H04B10/501 ,  H04B10/516 ,  H04B10/564 ,  H04B10/60 ,  H04B10/693 ,  H04L25/0272

    Abstract: Methods and systems for split voltage domain receiver circuits are disclosed and may include amplifying complementary received signals in a plurality of partial voltage domains. The signals may be combined into a single differential signal in a single voltage domain. Each of the partial voltage domains may be offset by a DC voltage from the other partial voltage domains. The sum of the partial domains may be equal to a supply voltage of the integrated circuit. The complementary signals may be received from a photodiode. The amplified received signals may be amplified via stacked common source amplifiers, common emitter amplifiers, or stacked inverters. The amplified received signals may be DC coupled prior to combining. The complementary received signals may be amplified and combined via cascode amplifiers. The voltage domains may be stacked, and may be controlled via feedback loops. The photodetector may be integrated in the integrated circuit.

    Method and system for a distributed optoelectronic receiver
    56.
    发明授权
    Method and system for a distributed optoelectronic receiver 有权

    公开(公告)号：US09973282B2

    公开(公告)日：2018-05-15

    申请号：US15356010

    申请日：2016-11-18

    Applicant: Luxtera, Inc.

    Inventor： Brian Welch ,  Gianlorenzo Masini

    IPC: H04B10/69 ,  H03H21/00 ,  H04B10/80 ,  H03F3/08 ,  H03G3/30

    CPC classification number: H04B10/693 ,  H03F3/085 ,  H03G3/3084 ,  H03H21/0012 ,  H04B10/80

    Abstract: Methods and systems for a distributed optoelectronic receiver are disclosed and may include an optoelectronic receiver having a grating coupler, a splitter, a plurality of photodiodes, and a plurality of transimpedance amplifiers (TIAs). The receiver receives a modulated optical signal utilizing the grating coupler, splits the received signal into a plurality of optical signals, generates a plurality of electrical signals from the plurality of optical signals utilizing the plurality of photodiodes, communicates the plurality of electrical signals to the plurality of TIAs, amplifies the plurality of electrical signals utilizing the plurality of TIAs, and generates an output electrical signal from coupled outputs of the plurality of TIAs. Each TIA may be configured to amplify signals in a different frequency range. One of the plurality of electrical signals may be DC coupled to a low frequency TIA of the plurality of TIAs.

    Method And System For Split Voltage Domain Transmitter Circuits
    60.
    发明申请
    Method And System For Split Voltage Domain Transmitter Circuits 审中-公开

    公开(公告)号：US20170257171A1

    公开(公告)日：2017-09-07

    申请号：US15596034

    申请日：2017-05-16

    Applicant: Luxtera, Inc.

    Inventor： Brian Welch ,  Daniel Kucharski

    IPC: H04B10/60 ,  H04L25/02 ,  H04B10/564 ,  H04B10/50 ,  H04B10/516

    CPC classification number: H04L25/061 ,  G02B6/4201 ,  G02B6/4242 ,  H04B10/501 ,  H04B10/516 ,  H04B10/564 ,  H04B10/60 ,  H04B10/693 ,  H04L25/0272

    Abstract: Methods and systems for split voltage domain transmitter circuits are disclosed and may include a two-branch output stage including a plurality of CMOS transistors, each branch of the two-branch output stage comprising two stacked CMOS inverter pairs from among the plurality of CMOS transistors; the two stacked CMOS inverter pairs of a given branch being configured to drive a respective load, in phase opposition to the other branch; and a pre-driver circuit configured to receive a differential modulating signal and output, to respective inputs of the two stacked CMOS inverters, two synchronous differential voltage drive signals having a swing of half the supply voltage and being DC-shifted by half of the supply voltage with respect to each other. The load may include a series of diodes that are driven in differential mode via the drive signals. An optical signal may be modulated via the diodes.

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