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    PHOTONIC INTEGRATED CIRCUIT WITH ACTIVE ALIGNMENT
    1.
    发明申请
    PHOTONIC INTEGRATED CIRCUIT WITH ACTIVE ALIGNMENT 审中-公开

    公开(公告)号：US20190212505A1

    公开(公告)日：2019-07-11

    申请号：US16354780

    申请日：2019-03-15

    Applicant: Juniper Networks, Inc.

    Inventor： Brandon W. Buckley ,  Brian Robert Koch ,  John Garcia ,  Jared Bauters ,  Sudharsanan Srinivasan ,  Anand Ramaswamy

    IPC: G02B6/42 ,  G02B6/12 ,  G02B6/43 ,  G02B6/30 ,  H04B10/25

    Abstract: An example photonic integrated circuit includes a transmitter circuit with a optical communication path to an optical coupler configured to couple with an optical fiber. The optical communication path has a propagation direction away from the transmitter circuit and towards the optical coupler. A counter-propagating tap diverts light sent by a light source backward against the propagation direction of the optical communication path. A photodiode receives the diverted light and measures its power level. The photodiode generates a feedback signal for the optical coupler and provides the feedback signal to the optical coupler. The optical coupler receives the feedback signal and adjusts a coupling alignment of the optical communication path to the optical fiber based on the feedback signal, which indicates the measured power level of the diverted counter-propagating light.

    SMOOTH WAGEGUIDE STRUCTURES AND MANFACTURING METHODS
    2.
    发明申请
    SMOOTH WAGEGUIDE STRUCTURES AND MANFACTURING METHODS 审中-公开

    公开(公告)号：US20190064439A1

    公开(公告)日：2019-02-28

    申请号：US15689296

    申请日：2017-08-29

    Applicant: Juniper Networks, Inc.

    Inventor： Avi Feshali ,  John Hutchinson ,  Jared Bauters

    IPC: G02B6/136 ,  G02B6/43 ,  G02B6/122

    Abstract: In integrated optical structures (e.g., silicon-to-silicon-nitride mode converters) implemented in semiconductor-on-insulator substrates, wire waveguides whose sidewalls substantially consist of portions coinciding with crystallographic planes and do not extend laterally beyond the top surface of the wire waveguide may provide benefits in performance and/or manufacturing needs. Such wire waveguides may be manufactured, e.g., using a dry-etch of the semiconductor device layer down to the insulator layer to form a wire waveguide with exposed sidewalls, followed by a smoothing crystallographic wet etch.

    Integrated wavelength locker
    3.
    发明授权
    Integrated wavelength locker 有权

    公开(公告)号：US10128634B2

    公开(公告)日：2018-11-13

    申请号：US15689352

    申请日：2017-08-29

    Applicant: Juniper Networks, Inc.

    Inventor： John Parker ,  Jared Bauters ,  Jonathan Edgar Roth ,  Erik Norberg ,  Gregory Alan Fish

    IPC: H01S5/068 ,  G02B6/293 ,  H01S5/0687 ,  H01S5/06

    Abstract: Described are various configurations of integrated wavelength lockers including asymmetric Mach-Zehnder interferometers (AMZIs) and associated detectors. Various embodiments provide improved wavelength-locking accuracy by using an active tuning element in the AMZI to achieve an operational position with high locking sensitivity, a coherent receiver to reduce the frequency-dependence of the locking sensitivity, and/or a temperature sensor and/or strain gauge to computationally correct for the effect of temperature or strain changes.

    LOSS MONITORING IN PHOTONIC CIRCUIT FABRICATION
    6.
    发明申请
    LOSS MONITORING IN PHOTONIC CIRCUIT FABRICATION 有权

    公开(公告)号：US20220065798A1

    公开(公告)日：2022-03-03

    申请号：US17006366

    申请日：2020-08-28

    Applicant: Juniper Networks, Inc.

    Inventor： Erik Johan Norberg ,  Rui Liang ,  Benjamin M. Curtin ,  Jared Bauters

    IPC: G01N21/95 ,  G02F1/225 ,  G02B6/13 ,  G01N21/45

    Abstract: Optical fabrication monitor structures can be included in a design fabricated on a wafer from a mask or fabrication reticle. A first set of components can be formed in an initial fabrication cycle, where the first set includes functional components and monitor structures. A second set of components can be formed by subsequent fabrication processes that can potentially cause errors or damage to the first set of components. The monitor structures can be implemented during fabrication (e.g., in a cleanroom) to detect fabrication errors without pulling or scrapping the wafer.

    Photonic integrated circuit with active alignment
    7.
    发明授权
    Photonic integrated circuit with active alignment 有权

    公开(公告)号：US11243362B2

    公开(公告)日：2022-02-08

    申请号：US16918397

    申请日：2020-07-01

    Applicant: Juniper Networks, Inc.

    Inventor： Brandon W. Buckley ,  Brian Robert Koch ,  John Garcia ,  Jared Bauters ,  Sudharsanan Srinivasan ,  Anand Ramaswamy

    IPC: G02B6/42 ,  G02B6/43 ,  G02B6/30 ,  G02B6/12 ,  H04B10/40 ,  H04B10/25

    Abstract: An example photonic integrated circuit includes a transmitter circuit with a optical communication path to an optical coupler configured to couple with an optical fiber. The optical communication path has a propagation direction away from the transmitter circuit and towards the optical coupler. A counter-propagating tap diverts light sent by a light source backward against the propagation direction of the optical communication path. A photodiode receives the diverted light and measures its power level. The photodiode generates a feedback signal for the optical coupler and provides the feedback signal to the optical coupler. The optical coupler receives the feedback signal and adjusts a coupling alignment of the optical communication path to the optical fiber based on the feedback signal, which indicates the measured power level of the diverted counter-propagating light.

    PHOTODETECTOR WITH SEQUENTIAL ASYMMETRIC-WIDTH WAVEGUIDES
    8.
    发明申请
    PHOTODETECTOR WITH SEQUENTIAL ASYMMETRIC-WIDTH WAVEGUIDES 审中-公开

    公开(公告)号：US20200209472A1

    公开(公告)日：2020-07-02

    申请号：US16233498

    申请日：2018-12-27

    Applicant: Juniper Networks, Inc.

    Inventor： Jonathan Edgar Roth ,  Jared Bauters ,  Erik Johan Norberg

    IPC: G02B6/12 ,  H01L27/146 ,  G02B6/122

    Abstract: Described are various configurations of optical structures having asymmetric-width waveguides. A photodetector can include parallel waveguides that have different widths, which can be connected via passive waveguide. One or more light absorbing regions can be proximate to the waveguides to absorb light propagating through one or more of the parallel waveguides. Multiple photodetectors having asymmetric width waveguides can operate to transduce light in different modes in a polarization diversity optical receiver.

    PHOTONIC INPUT/OUTPUT COUPLER ALIGNMENT
    9.
    发明申请
    PHOTONIC INPUT/OUTPUT COUPLER ALIGNMENT 审中-公开

    公开(公告)号：US20190331859A1

    公开(公告)日：2019-10-31

    申请号：US15967313

    申请日：2018-04-30

    Applicant: Juniper Networks, Inc.

    Inventor： Martin A. Spannagel ,  Brian Robert Koch ,  Jared Bauters

    IPC: G02B6/30

    Abstract: Optical alignment of an optical connector to input/output couplers of a photonic integrated circuit can be achieved by first actively aligning the optical connector successively to two loopback alignment features formed in the photonic chip of the PIC, optically unconnected to the PIC, and then moving the optical connector, based on precise knowledge of the positions of the loopback alignment features relative to the input/output couplers of the PIC, to a position aligned with the input/output couplers of the PIC and locking it in place.

    OPTICAL COUPLER INCLUDING A FARADAY ROTATOR LAYER AND AT LEAST ONE GRATING COUPLER
    10.
    发明申请
    OPTICAL COUPLER INCLUDING A FARADAY ROTATOR LAYER AND AT LEAST ONE GRATING COUPLER 审中-公开

    公开(公告)号：US20190064457A1

    公开(公告)日：2019-02-28

    申请号：US15685114

    申请日：2017-08-24

    Applicant: Juniper Networks, Inc.

    Inventor： Jonathan Edgar Roth ,  Jared Bauters ,  Gregory Alan Fish

    IPC: G02B6/42

    CPC classification number: G02B6/4213 ,  G02B6/272 ,  G02B6/2773 ,  G02B6/34 ,  G02B6/4206 ,  G02B6/4208

    Abstract: An optical coupling device can couple incident light from a fiber into waveguides, but can reduce the coupling of return light from the waveguides into the fiber. A Faraday rotator layer can rotate by forty-five degrees, with a first handedness, respective planes of polarization of incident beams, and can rotate by forty-five degrees, with a second handedness opposite the first handedness, respective planes of polarization of return beams. A redirection layer can include at least one grating coupler that can redirect an incident beam of one polarization so that the redirected path extends within the redirection layer toward a first waveguide, and can redirect an incident beam of an opposite polarization so that the redirected path extends within the redirection layer toward a second waveguide. An optional birefringent layer can spatially separate incident beam having different polarizations, so that two single-polarization grating couplers can be used.

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