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    SIGNAL CONTROL FOR SEGMENTED MODULATORS
    2.
    发明申请
    SIGNAL CONTROL FOR SEGMENTED MODULATORS 审中-公开

    公开(公告)号：US20190235345A1

    公开(公告)日：2019-08-01

    申请号：US15768893

    申请日：2015-10-27

    Applicant: Nan Qi ,  Cheung Li

    Inventor： Nan Qi ,  Cheung Li

    IPC: G02F1/21 ,  H03K5/135

    CPC classification number: G02F1/21 ,  G02F2001/212 ,  H03K5/135 ,  H03K2005/00052 ,  H03M9/00 ,  H04B10/5055 ,  H04B10/516

    Abstract: In example implementations, an apparatus includes a serializer, a re-timing buffer coupled to the serializer, and a plurality of segments coupled to the re-timing buffer. The plurality of segments may be used for controlling a timing of an electrical signal. Each one of the plurality of segments may include a segment serializer, a timing control coupled to the segment serializer and a driver coupled to the timing control. In addition, a phase clock may be coupled to the segment serializer and the timing control of each one of the plurality of segments.

    COMPACT, ENERGY EFFICIENT MACH-ZEHNDER INTERFEROMETERS AND OPTICAL ATTENUATORS
    3.
    发明申请
    COMPACT, ENERGY EFFICIENT MACH-ZEHNDER INTERFEROMETERS AND OPTICAL ATTENUATORS 审中-公开

    公开(公告)号：US20190235285A1

    公开(公告)日：2019-08-01

    申请号：US16380234

    申请日：2019-04-10

    Applicant: NeoPhotonics Corporation

    Inventor： Kenneth McGreer ,  Calvin Ho

    IPC: G02F1/01 ,  G02F1/225

    CPC classification number: G02F1/0147 ,  G02F1/225 ,  G02F1/2257 ,  G02F2001/212 ,  G02F2201/06 ,  G02F2202/09 ,  G02F2203/48 ,  G02F2203/50

    Abstract: Mach-Zehnder interferometers comprise heater elements configured to have projections in the plane of optical waveguides positioned such that two adjacent sections of one optical waveguide arms are heated by a common heater element. The heater and at least a substantial section of the heated waveguide segments can be curved. Configurations of an optical waveguide arm can comprise an outer curved heated section, an inner curved heated section, and a loopback waveguide section connecting the outer curved heated section and the inner curved heated section, with average radius of curvature selected to form an open accessible space. Appropriate configurations of the two optical waveguide arms provide for nested configurations of the arms that provide for a compact structure for the interferometer.

    OPTICAL MODULATOR
    5.
    发明申请
    OPTICAL MODULATOR 审中-公开

    公开(公告)号：US20190129273A1

    公开(公告)日：2019-05-02

    申请号：US16092357

    申请日：2017-02-23

    Applicant: Mitsubishi Electric Corporation

    Inventor： Toshiyuki TANAKA ,  Koichi AKIYAMA ,  Eiji YAGYU ,  Kiyotomo HASEGAWA

    IPC: G02F1/225 ,  G02F1/017

    CPC classification number: G02F1/2255 ,  G02F1/01708 ,  G02F1/025 ,  G02F1/2257 ,  G02F2001/212 ,  G02F2203/50

    Abstract: The present invention has an object to provide an optical modulator having a small-sized circuit configuration and a smaller voltage drop amount in a terminating resistor. An optical modulator includes first and second optical waveguides, a first signal electrode that inputs a first high frequency signal into the first optical waveguide, a second signal electrode that inputs a second high frequency signal having a reverse phase with respect to a phase of the first high frequency signal into the second optical waveguide, a first terminating resistor connected to the first signal electrode at a terminating part side, a second terminating resistor connected to the second signal electrode at a terminating part side, a connection point that connects the first and second signal electrodes via the first and second terminating resistors, and a direct current voltage supply connected to the connection point. A resistance value of the first terminating resistor is equal to characteristic impedance of the first signal electrode. A resistance value of the second terminating resistor is equal to characteristic impedance of the second signal electrode.

    OPTICAL PHASE MODULATORS
    6.
    发明申请
    OPTICAL PHASE MODULATORS 审中-公开

    公开(公告)号：US20190020419A1

    公开(公告)日：2019-01-17

    申请号：US15750493

    申请日：2015-08-06

    Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

    Inventor： Jason PELC ,  Ashkan SEYEDI ,  Marco FIORENTINO

    IPC: H04B10/556 ,  G02F1/225 ,  G02B6/293 ,  H04B10/50

    CPC classification number: H04B10/5561 ,  G02B6/29353 ,  G02F1/225 ,  G02F1/2257 ,  G02F2001/212 ,  G02F2203/15 ,  H04B10/505

    Abstract: In one example, an apparatus includes e first beam splitter having a final output and a second output. A first optical waveguide is coupled to the first output, and a second optical waveguide is coupled to the second output. A first tunable phase delay is further coupled to the second optical waveguide and has a third output. A first set of phase modulators is coupled to the first optical waveguide, and a second set of phase modulators is coupled to the third output of the first tunable phase delay. At least one of the first set of phase modulators and the second set of phase modulators includes a phase modulator that is driven to three or more distinct phase states. A second beam splitter has a first input coupled to the first optical waveguide and a second input coupled to the second optical waveguide.

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