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    Open path optical sensing system having an ultrasonic cleaner and method
    242.
    发明授权
    Open path optical sensing system having an ultrasonic cleaner and method 有权

    公开(公告)号：US09925570B2

    公开(公告)日：2018-03-27

    申请号：US14949261

    申请日：2015-11-23

    Applicant: NEC Laboratories America, Inc.

    Inventor： Philip Ji ,  Ting Wang

    IPC: B08B7/02 ,  G01N21/15 ,  B08B17/02

    CPC classification number: B08B7/028 ,  B08B17/02 ,  G01N21/15 ,  G01N2021/154

    Abstract: An open path optical sensing system having an ultrasonic cleaner. The system includes at least one ultrasound transducer which is configured to propagate ultrasonic waves across exposed surfaces of optical components of the optical sensing system. The ultrasonic waves create tiny vibrations on the exposed surfaces of the optical components which clean the surfaces of environmental pollutants and prevent environmental pollutants from accumulating on the surface. The ultrasonic waves may have a frequency that is substantially different than the modulation frequency of a modulated laser light beam that is generated by a laser of the open path optical sensing system. The surfaces of a plurality of optical components may be cleaned by the ultrasonic waves of a single ultrasound transducer. A plurality of ultrasound transducers may propagate waves on a single optical component.

    Submarine reconfigurable optical add/drop multiplexer with passive branching unit
    244.
    发明授权
    Submarine reconfigurable optical add/drop multiplexer with passive branching unit 有权

    公开(公告)号：US09813182B2

    公开(公告)日：2017-11-07

    申请号：US14454031

    申请日：2014-08-07

    Applicant: NEC Laboratories America, Inc.

    Inventor： Philip N. Ji ,  Ryuji Aida ,  Ting Wang

    IPC: H04J14/02

    CPC classification number: H04J14/021 ,  H04J14/0205 ,  H04J14/0208

    Abstract: Systems and methods for data transport, including submarine reconfigurable optical add/drop multiplexers, branching units configured to receive signals from trunk terminals (TTs), and dummy light filters configured to pass useful signals through the filters, and to reflect dummy light. Optical interleavers are configured to separate useful signals into two or more groups of optical channels, and the optical channels are set to a frequency of either a left or a right portion of a total channel bandwidth. De-interleavers merge signal groups together from trunk terminals, and lasers at each of the transponders at the source terminals are configured to adjust a destination of a channel by fine tuning a frequency or wavelength of the one or more signals.

    Mechanism for remote safety monitoring sensor with low-power consumption communication
    245.
    发明授权
    Mechanism for remote safety monitoring sensor with low-power consumption communication 有权

    公开(公告)号：US09807476B2

    公开(公告)日：2017-10-31

    申请号：US15090653

    申请日：2016-04-05

    Applicant: NEC Laboratories America, Inc.

    Inventor： Junqiang Hu ,  Ting Wang

    IPC: G08C19/04 ,  H04Q9/00

    CPC classification number: H04Q9/00 ,  H04Q2209/10 ,  H04Q2209/40 ,  H04Q2209/823 ,  H04Q2209/883

    Abstract: Disclosed is a sensing platform including a server; one or more remote sensing systems coupled to the server, one or more local sensor(s) for target object monitoring; a wireless module coupled to a network through wireless a link; and a processor to read data from local sensor(s) and communicate information through the network using the wireless module. The sensing system has a low power consumption mode in which the processor puts the wireless module and the local sensor(s) in sleep mode or powered off. The processor has a sleep or deep sleep mode, a power-off mode, and a wake up mode, and the local sensor(s) are accessed at a frequency 1/T1 and the wireless module is at lower frequency 1/Tw where Tw>T1, and the server receives monitored value from remote sensing systems and interacts with the remote sensing system.

    Multiple component codes based generalized low-density parity-check codes for high-speed optical transport
    248.
    发明授权
    Multiple component codes based generalized low-density parity-check codes for high-speed optical transport 有权

    公开(公告)号：US09722634B2

    公开(公告)日：2017-08-01

    申请号：US14513975

    申请日：2014-10-14

    Applicant: NEC Laboratories America, Inc.

    Inventor： Ivan B. Djordjevic ,  Ting Wang

    IPC: H03M13/29 ,  H03M13/00 ,  H03M13/11 ,  H04B10/516 ,  H03M13/25 ,  H04L1/00

    CPC classification number: H03M13/1174 ,  H03M13/255 ,  H04B10/516 ,  H04L1/00

    Abstract: Systems and methods for data transport, including encoding streams of input data using generalized low-density parity check (GLDPC) encoders, the one or more GLDPC encoders being configured to generate GLDPC coded data streams using a plurality of component local codes to improve error correction strength, employ single-parity checks and two or more local block codes during generation of the GLDPC codes, and enable continuous tuning of code rate using the generated GLDPC codes. Signals may be generated using mappers, the mappers configured to assign bits of signals to signal constellations and to associate the bits of the signals with signal constellation points. The signal may be modulated using an I/Q or 4-D modulator composed of one polarization beam splitter, two I/Q modulators, and one polarization beam combiner. The modulated signals are multiplexed using a mode-multiplexer, transmitted over a transmission medium, and the signals are received and decoded using GLDPC decoders.

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