Mach-zehnder modulator driver
    52.
    发明授权

    公开(公告)号:US10234705B2

    公开(公告)日:2019-03-19

    申请号:US16032947

    申请日:2018-07-11

    Abstract: A driver configuration for driving a Mach-Zehnder modulator (MZM) includes a first driver supplied by a first voltage and a second voltage and configured to provide a first two complimentary outputs respectively to a first N-electrode of a first branch of the MZM and a second N-electrode of a second branch of the MZM. Additionally, the driver configuration includes a second driver supplied by a third voltage and a fourth voltage and configured to provide a second two complimentary outputs respectively to a first P-electrode of the first branch and a second P-electrode of the second branch. The driver configuration sets a difference between the third voltage and the fourth voltage equal to a difference between the first voltage and the second voltage to provide a same peak-to-peak differential swing for modulating light wave through each transmission line and output a modulated light with twice of the peak-to-peak differential swing.

    MULTIPLEXERS WITH PROTECTION SWITCHING
    55.
    发明申请

    公开(公告)号:US20190052513A1

    公开(公告)日:2019-02-14

    申请号:US15987808

    申请日:2018-05-23

    Abstract: The present invention is directed to data communication. In certain embodiments, the present invention provides switching mechanism for choosing between redundant communication links. Data received from a first set of communication links are processed to have alignment markers removed, and first figure of merit value is determined based on the data without alignment markers. Similarly, a second figure of merit value is determined for the data received from the second set of communication links. A switch selects between the first set of communication links and the second set of communication links based on their respective figure of merit values. Alignment markers are inserted into the data transmitted through the selected set of data links. There are other embodiments as well.

    HIGH-SPEED PHASE INTERPOLATOR
    56.
    发明申请

    公开(公告)号:US20190052253A1

    公开(公告)日:2019-02-14

    申请号:US16153248

    申请日:2018-10-05

    Inventor: Irene QUEK

    CPC classification number: H03K5/135 H03K2005/00052 H03M1/747 H04L27/38

    Abstract: The present invention relates generally to integrated circuits. More particularly, the present invention provides a circuit and method for a CMOS interpolator for an output clock signal with a desirable phase for a high speed serializer/deserializer device. In a specific embodiment, the present invention provides a phase interpolator device that mixes phase-shifted clock signals according to a predetermined weight values at predetermined time intervals. There are other embodiments as well.

    OPTICAL DISPERSION COMPENSATOR ON SILICON
    57.
    发明申请

    公开(公告)号:US20190041580A1

    公开(公告)日:2019-02-07

    申请号:US16157409

    申请日:2018-10-11

    Abstract: An optical dispersion compensator integrated with a silicon photonics system including a first phase-shifter coupled to a second phase-shifter in parallel on the silicon substrate characterized in an athermal condition. The dispersion compensator further includes a third phase-shifter on the silicon substrate to the first phase-shifter and the second phase-shifter through two 2×2 splitters to form an optical loop. A second entry port of a first 2×2 splitter is for coupling with an input fiber and a second exit port of a second 2×2 splitter is for coupling with an output fiber. The optical loop is characterized by a total phase delay tunable via each of the first phase-shifter, the second phase-shifter, and the third phase-shifter such that a normal dispersion (>0) at a certain wavelength in the input fiber is substantially compensated and independent of temperature.

    Small form factor transmitting device

    公开(公告)号:US10141717B2

    公开(公告)日:2018-11-27

    申请号:US15855927

    申请日:2017-12-27

    Abstract: A packaged transmitter device includes a base member comprising a planar part mounted with a thermoelectric cooler, a transmitter, and a coupling lens assembly, and an assembling part connected to one side of the planar part. The device further includes a circuit board bended to have a first end region and a second end region being raised to a higher level. The first end region disposed on a top surface of the planar part includes multiple electrical connection patches respectively connected to the thermoelectric and the transmitter. The second end region includes an electrical port for external connection. Additionally, the device includes a cover member disposed over the planar part. Furthermore, the device includes a cylindrical member installed to the assembling part for enclosing an isolator aligned to the coupling lens assembly along its axis and connected to a fiber to couple optical signal from the transmitter to the fiber.

    Silicon-waveguide-based broadband polarization beam rotator

    公开(公告)号:US10133002B2

    公开(公告)日:2018-11-20

    申请号:US15833937

    申请日:2017-12-06

    Inventor: Jie Lin

    Abstract: A compact polarization beam rotator includes a converter waveguide comprising a first segment and a second segment both in corresponding taper rib shapes sharing a first middle plane and configured to receive an input optical signal with TM polarization mode from an input plane and convert the TM polarization mode to TE1 polarization mode comprising a first arm mode and a second arm mode at a second middle plane. The polarization beam rotator additionally includes a splitter waveguide coupled to the second middle plane for separating the first arm mode and the second arm mode at a third plane respectively coupled to a first branch waveguide to deliver the first arm mode in phase and a second branch waveguide to reverse the second arm mode phase by 180°, and a 2×1 MMI coupler waveguide to combine both arm modes in phase to an output optical signal with TE polarization mode.

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