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    THERMO-OPTIC PHASE SHIFTER FOR SEMICONDUCTOR OPTICAL WAVEGUIDE
    1.
    发明申请
    THERMO-OPTIC PHASE SHIFTER FOR SEMICONDUCTOR OPTICAL WAVEGUIDE 审中-公开

    公开(公告)号：US20180314082A1

    公开(公告)日：2018-11-01

    申请号：US15498274

    申请日：2017-04-26

    Applicant: Cisco Technology, Inc.

    Inventor： Sean P. ANDERSON ,  Donald ADAMS

    IPC: G02F1/01

    Abstract: Embodiments include a method and associated apparatuses for phase-shifting an optical signal. The method comprises receiving, at a first end of an optical waveguide formed in a semiconductor layer and extending along a first axis, an optical signal having a first phase. The method further comprises transmitting, at a second end of the optical waveguide opposite the first end, a modified optical signal having a second phase different than the first phase. Transmitting a modified optical signal comprises applying a voltage signal between a first contact region and a second contact region formed in the semiconductor layer apart from the first axis. Applying a voltage signal causes an electrical current to be conducted along a dimension of the optical waveguide. The electrical current causes resistive heating of the optical waveguide and a desired phase shift between the first phase and the second phase.

    EXTINCTION RATIO IMPROVEMENTS IN SILICON PHOTONICS
    2.
    发明申请
    EXTINCTION RATIO IMPROVEMENTS IN SILICON PHOTONICS 审中-公开

    公开(公告)号：US20200106526A1

    公开(公告)日：2020-04-02

    申请号：US16700722

    申请日：2019-12-02

    Applicant: Cisco Technology, Inc.

    Inventor： Sean P. ANDERSON ,  Mark A. WEBSTER

    IPC: H04B10/50 ,  G02F1/225 ,  G02F1/313 ,  H04B10/073 ,  H04B10/54 ,  H04Q11/00

    Abstract: Improvements in extinguishing optical signals in silicon photonics may be achieved by supplying a test signal of a known characteristics to a Photonic Element (PE) to extinguish the test signal via a first phase shifter and intensity modulator on a first arm of the PE and a second phase shifter and intensity modulator on a second arm of the PE; sweeping through a plurality of voltages at the first intensity modulator to identify a first voltage that is associated with an extinction ratio at an output of the PE that satisfies an induced loss threshold and a second voltage that is associated with an induced loss in the test signal at the output of the PE that satisfies an extinction ratio threshold; and setting the PE to provide an operational voltage to the first intensity modulator based on the first voltage and the second voltage.

    POLARIZATION-BASED WAVELENGTH MULTIPLEXER
    3.
    发明申请
    POLARIZATION-BASED WAVELENGTH MULTIPLEXER 审中-公开

    公开(公告)号：US20190007157A1

    公开(公告)日：2019-01-03

    申请号：US15637905

    申请日：2017-06-29

    Applicant: Cisco Technology, Inc.

    Inventor： Sean P. ANDERSON

    IPC: H04J14/06 ,  H04J14/02 ,  G02B6/126

    Abstract: The present disclosure discloses a photonic chip. The photonic chip receives a first optical signal and a second optical signal with different wavelengths from two optical sources, respectively. The photonic chip includes a polarization multiplexing element (PME). The PME receives the first and the second optical signals from the first and the second optical sources respectively and combines the first and the second optical signals into a single optical path. The PME polarizes the first optical signal to have a different polarization than the second optical signal and transmits the combined first and the second optical signals in a common waveguide.

    OPTICAL FIBER COUPLING USING MULTIPLE CYLINDRICAL LENSES
    5.
    发明申请
    OPTICAL FIBER COUPLING USING MULTIPLE CYLINDRICAL LENSES 审中-公开

    公开(公告)号：US20190265437A1

    公开(公告)日：2019-08-29

    申请号：US15904038

    申请日：2018-02-23

    Applicant: Cisco Technology, Inc.

    Inventor： Vipulkumar PATEL ,  Sean P. ANDERSON ,  Weizhuo LI

    IPC: G02B9/04 ,  G02B6/10 ,  G02B6/26

    Abstract: A system and related method and assembly are disclosed. The system comprises one or more optical fibers configured to propagate one or more optical signals. The system further comprises at least a first cylindrical lens element fixedly connected with the one or more optical fibers and configured to expand the one or more optical signals along a predefined dimension. The system further comprises at least a second cylindrical lens element optically coupled with the first cylindrical lens element and configured to condense the expanded one or more optical signals along the predefined dimension.

    GERMANIUM PHOTODETECTOR WITH EXTENDED RESPONSIVITY
    9.
    发明申请
    GERMANIUM PHOTODETECTOR WITH EXTENDED RESPONSIVITY 审中-公开

    公开(公告)号：US20190386159A1

    公开(公告)日：2019-12-19

    申请号：US16550054

    申请日：2019-08-23

    Applicant: Cisco Technology, Inc.

    Inventor： Igal I. BAYN ,  Sean P. ANDERSON

    IPC: H01L31/0232 ,  G01S7/491 ,  H01L31/02 ,  H01L31/0352 ,  H01L31/028

    Abstract: Embodiments herein describe photonic systems that include a germanium photodetector thermally coupled to a resistive element. Current flowing through the resistive element increases the temperature of the resistive element. Heat from the resistive element increases the temperature of the thermally coupled photodetector. Increasing the temperature of the photodetector increases the responsivity of the photodetector. The bias voltage of the photodetector can be increased to increase the bandwidth of the photodetector. In various embodiments, the photodetector includes at least one waveguide to receive light into the photodetector. Other embodiments include multiple resistive elements thermally coupled to the photodetector.

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