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    EFFICIENTLY COMBINING MULTIPLE TAPS OF AN OPTICAL FILTER
    1.
    发明申请
    EFFICIENTLY COMBINING MULTIPLE TAPS OF AN OPTICAL FILTER 有权

    公开(公告)号：US20210036779A1

    公开(公告)日：2021-02-04

    申请号：US16931312

    申请日：2020-07-16

    Applicant: GenXComm, Inc.

    Inventor： Thien-An Nguyen ,  Monireh Moayedi Pour Fard ,  Farzad Mokhtari Koushyar ,  McKay Bradford ,  Ke Liu

    IPC: H04B10/2575 ,  H04B10/2507 ,  H04B10/69

    Abstract: An optical filter comprises an array of waveguides fabricated on an optical integrated circuit (PIC). The array comprises individual waveguides, each of which receive light inputs, e.g., individual taps of a multi-tap optical filter used in an interference cancellation circuit. Typically, the output(s) of the individual waveguides are located at an exit (edge) of the PIC. At least one second waveguide in the array is patterned on the PIC in a converged configuration such that the light transiting these waveguides co-propagates and interacts across given portions of the respective waveguides before exiting the waveguide array along a common facet, thereby generating or inhibiting one of intermodulation products, and harmonics. This structural configuration enables the generation of various modes of transmission at the PIC exit, enabling more efficient transfer of the energy, e.g., to an associated photodetector (PD) that provides conversion of the energy to the RF domain.

    Efficiently combining multiple taps of an optical filter
    2.
    发明授权
    Efficiently combining multiple taps of an optical filter 有权

    公开(公告)号：US11309965B2

    公开(公告)日：2022-04-19

    申请号：US16931312

    申请日：2020-07-16

    Applicant: GenXComm, Inc.

    Inventor： Thien-An Nguyen ,  Monireh Moayedi Pour Fard ,  Farzad Mokhtari Koushyar ,  McKay Bradford ,  Ke Liu

    IPC: H04B10/2575 ,  H04B10/2507 ,  H04B10/69

    Abstract: An optical filter comprises an array of waveguides fabricated on an optical integrated circuit (PIC). The array comprises individual waveguides, each of which receive light inputs, e.g., individual taps of a multi-tap optical filter used in an interference cancellation circuit. Typically, the output(s) of the individual waveguides are located at an exit (edge) of the PIC. At least one second waveguide in the array is patterned on the PIC in a converged configuration such that the light transiting these waveguides co-propagates and interacts across given portions of the respective waveguides before exiting the waveguide array along a common facet, thereby generating or inhibiting one of intermodulation products, and harmonics. This structural configuration enables the generation of various modes of transmission at the PIC exit, enabling more efficient transfer of the energy, e.g., to an associated photodetector (PD) that provides conversion of the energy to the RF domain.

    Low loss, polarization-independent, large bandwidth mode converter for edge coupling
    3.
    发明授权
    Low loss, polarization-independent, large bandwidth mode converter for edge coupling 有权

    公开(公告)号：US11215755B2

    公开(公告)日：2022-01-04

    申请号：US16576169

    申请日：2019-09-19

    Applicant: GenXComm, Inc.

    Inventor： Ke Liu ,  Thien-An Nguyen

    IPC: G02B6/122 ,  G02B6/14 ,  G02B6/10 ,  G02B6/12

    Abstract: A mode converter formed by parallel tapered waveguides on a SiN platform. The waveguides form a trident structure comprising a main waveguide with an inverse taper structure, and a pair of waveguides on each side of the main waveguide. Each adjacent waveguide has a taper structure but one that is opposed to that of the main waveguide, namely, a width that gradually increases along the direction of light propagation to a larger value at an end tip thereof. The end tips of the waveguides terminate along a common input/output facet of the converter. The adjacent waveguides help to shape the mode of the light propagating through the main waveguide, in so doing enabling the converter to exhibit high coupling efficiency and polarization independence in the full optical communication bands (i.e., from O to L-band) by successfully tuning the mode shape at a chip facet. The trident mode converter enables efficient optical fiber-to-chip coupling.

    FIELD PROGRAMMABLE OPTICAL FILTER
    4.
    发明公开
    FIELD PROGRAMMABLE OPTICAL FILTER 审中-公开

    公开(公告)号：US20240128992A1

    公开(公告)日：2024-04-18

    申请号：US18488709

    申请日：2023-10-17

    Applicant: GenXComm, Inc.

    Inventor： Farzad Mokhtari-Koushyar ,  Thien-An Nguyen ,  Che-Chun Lin

    IPC: H04B1/12 ,  H04B10/50 ,  H04B10/60

    CPC classification number: H04B1/12 ,  H04B10/503 ,  H04B10/60 ,  H04B2210/006

    Abstract: A programmable filter for electronic signals. The filter includes an input that splits power of the input signal along two paths, a first and second path that is phase shifted by ninety degrees in respect of the first path. The first and second path are each modulated to the optical domain, and provided as input to respective filter chains. The in-phase signal can be filtered by IIR or FIR optical filters with configurable operation, as well the shifted signal can be filtered by a second chain of IIR and FIR optical filters with configurable operation. Resulting output from each filter chain is recombined and demodulated from the optical domain. In this manner, the electronic filter can adopt any suitable impulse response, including impulse responses described with complex coefficients. Real parts can be configured by operation of the first filter chain and imaginary parts by operation of the second filter chain.

    PHASE STABLE SIGNAL GENERATOR AND SIGNAL DISTRIBUTION SYSTEM
    5.
    发明公开
    PHASE STABLE SIGNAL GENERATOR AND SIGNAL DISTRIBUTION SYSTEM 审中-公开

    公开(公告)号：US20240063913A1

    公开(公告)日：2024-02-22

    申请号：US18234304

    申请日：2023-08-15

    Applicant: GenXComm, Inc.

    Inventor： Farzad Mokhtari-Koushyar ,  Thien-An Nguyen

    IPC: H04B10/50 ,  H04B10/508

    CPC classification number: H04B10/503 ,  H04B10/508

    Abstract: A signal generator provides a periodic optical signal as output. The signal generator can be optically coupled to a splitter or other distribution network that transits the optical signal along multiple paths to terminate at different locations and/or for use by multiple electronic circuits. Each path can include a reflector element that reflects a portion of the signal back along the optical signal path. Reflections can be separated by operation of a circulator and photodiode. Output of the photodiode can be used to adjust phase and/or amplitude of optical signals traversing each optical signal path such that each electronic circuit receives an in-phase reference signal as input.

    Efficiently combining multiple taps of an optical filter
    6.
    发明授权
    Efficiently combining multiple taps of an optical filter 有权

    公开(公告)号：US10727945B1

    公开(公告)日：2020-07-28

    申请号：US16511715

    申请日：2019-07-15

    Applicant: GenXComm, Inc.

    Inventor： Thien-An Nguyen ,  Monireh Moayedi Pour Fard ,  Farzad Mokhtari Koushyar ,  McKay Bradford ,  Ke Liu

    IPC: H04B10/2507 ,  H04B10/2575 ,  H04B10/69

    Abstract: An optical filter comprises an array of waveguides fabricated on an optical integrated circuit (PIC). The array comprises individual waveguides, each of which receive light inputs, e.g., individual taps of a multi-tap optical filter used in an interference cancellation circuit. Each individual waveguide comprises an inlet, and an outlet. Typically, the output(s) of the individual waveguides are located at an exit (edge) of the PIC. In one embodiment, at least one second waveguide in the array is patterned on the PIC in a converged configuration such that, relative to a first waveguide, the light transiting these waveguides co-propagates and interacts across given portions of the respective waveguides before exiting the waveguide array along a common facet, thereby generating or inhibiting one of: intermodulation products, and harmonics. This structural configuration enables the generation of various modes of transmission at the PIC exit, enabling more efficient transfer of the energy, e.g., to an associated photodetector (PD) that provides conversion of the energy to the RF domain.

    Low loss, polarization-independent, large bandwidth mode converter for edge coupling
    10.
    发明申请
    Low loss, polarization-independent, large bandwidth mode converter for edge coupling 有权

    公开(公告)号：US20210088724A1

    公开(公告)日：2021-03-25

    申请号：US16576169

    申请日：2019-09-19

    Applicant: GenXComm, Inc.

    Inventor： Ke Liu ,  Thien-An Nguyen

    IPC: G02B6/122 ,  G02B6/14 ,  G02B6/10

    Abstract: A mode converter formed by parallel tapered waveguides on a SiN platform. The waveguides form a trident structure comprising a main waveguide with an inverse taper structure, and a pair of waveguides on each side of the main waveguide. Each adjacent waveguide has a taper structure but one that is opposed to that of the main waveguide, namely, a width that gradually increases along the direction of light propagation to a larger value at an end tip thereof. The end tips of the waveguides terminate along a common input/output facet of the converter. The adjacent waveguides help to shape the mode of the light propagating through the main waveguide, in so doing enabling the converter to exhibit high coupling efficiency and polarization independence in the full optical communication bands (i.e., from O to L-band) by successfully tuning the mode shape at a chip facet. The trident mode converter enables efficient optical fiber-to-chip coupling.

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