Patents by Inventor Shaoliang Zhang

Shaoliang Zhang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20180269979
    Abstract: Aspects of the present disclosure describe methods of generating an optimized set of constellation symbols for an optical transmission network wherein the optimized constellation is based on GMI cost and considers both fiber nonlinearity and linear transmission noise.
    Type: Application
    Filed: March 6, 2018
    Publication date: September 20, 2018
    Applicant: NEC LABORATORIES AMERICA, INC
    Inventors: Shaoliang ZHANG, Fatih YAMAN, Eduardo Mateo RODRIGUEZ, Yoshihisa INADA
  • Publication number: 20180261971
    Abstract: Aspects of the present disclosure describe systems, methods, and structures for providing bidirectional C-band and L-band transmission employing optical circulators which advantageously eliminates C\L WDM couplers while still blocking any backward amplified spontaneous emissions from optical amplifiers.
    Type: Application
    Filed: March 5, 2018
    Publication date: September 13, 2018
    Inventors: Fatih YAMAN, Shaoliang ZHANG, Eduardo Mateo RODRIGUEZ, Kohei NAKAMURA, Takanori INOUE, Yoshihisa INADA
  • Publication number: 20180261968
    Abstract: Aspects of the present disclosure describe systems, methods, and structures for providing C-band and L-band transmission exhibiting increased power efficiency by diverting a portion of C-band optical energy to an input of L-band optical amplifiers (C-seeding) while optionally employing circulators to eliminate the need for optical isolators.
    Type: Application
    Filed: March 6, 2018
    Publication date: September 13, 2018
    Applicant: NEC LABORATORIES AMERICA, INC.
    Inventors: Fatih Yaman, Shaoliang Zhang, Eduardo Mateo Rodriquez, Takanori Inoue, Yoshihisa Inada
  • Publication number: 20180252870
    Abstract: A method and switch are provided for reconfigurable optical space switch. The method includes receiving a control signal, from a controller, to configure a path through the reconfigurable optical space switch. The method also includes applying a voltage to one or more direction changing devices at each intersection between each of the east-west optical waveguides and each of the north-south optical waveguides to form the path through the reconfigurable optical space switch. The method additionally includes receiving an optical signal in one of a plurality of passive waveguides at a beginning of the path, including the plurality of east-west optical waveguides and the plurality of north-south optical waveguides. The method further includes outputting the optical signal out on of the plurality of passive waveguides at an end of the path.
    Type: Application
    Filed: February 28, 2018
    Publication date: September 6, 2018
    Inventors: Ivan B. Djordjevic, Shaoliang Zhang, Ting Wang
  • Publication number: 20180255385
    Abstract: A method and network are provided for a reconfigurable optical sensor network. The method includes configuring, by a controller, the reconfigurable optical sensor network, including one or more reconfigurable optical space switches, for a type of sensor data. The method also includes generating sensor data in the type of sensor data with one or more of a plurality of bidirectional sensors. The method additionally includes sending the sensor data to one or more optical star couplers. The method further includes forwarding the sensor data from one of the one or more optical star couplers to the one of one or more reconfigurable optical space switches.
    Type: Application
    Filed: February 28, 2018
    Publication date: September 6, 2018
    Inventors: Ivan B. Djordjevic, Shaoliang Zhang, Ting Wang
  • Publication number: 20180252557
    Abstract: A four-dimensional multiplexing method and four-dimensional multiplexing system are provided for optical networks. The method includes receiving sensor data to be transmitted on an optical network. The method also includes encoding the sensor data into an optical signal employing one or more multiplexing systems. The method additionally includes transmitting the optical signal over the optical network. The method further includes decoding the optical signal into the sensor data employing the one or more multiplexing systems. The method also includes controlling an operation of a processor-based machine responsive to the sensor data.
    Type: Application
    Filed: February 28, 2018
    Publication date: September 6, 2018
    Inventors: Ivan B. Djordjevic, Shaoliang Zhang, Ting Wang
  • Publication number: 20180234285
    Abstract: Systems and methods for orbital angular momentum (OAM)-based multidimensional wireless communication. The OAM-based multidimensional wireless communication is preformed with a transmitter for generating an RF modulated signal carrying a data sequence. Further included is an OAM antenna array including OAM antenna elements, each of which includes an azimuthal phase shifter and an antenna element. The azimuthal phase shifter shifts an azimuthal phase term of a wavefront generated by the antenna element such that the OAM antenna element imposes the multidimensional modulated signal on a pre-determined OAM mode of a carrier signal corresponding to the azimuthal phase term.
    Type: Application
    Filed: February 15, 2018
    Publication date: August 16, 2018
    Inventors: Ivan Djordjevic, Ting Wang, Shaoliang Zhang
  • Publication number: 20180234236
    Abstract: Systems and methods for quantum key distribution using orbital angular momentum (OAM)-modes-enabled secure multidimensional coded modulation. The quantum key distribution including symbols of a raw key across subcarriers and multiplexing the subcarriers to form an electrical carrier. Then optically modulating the electrical carrier with an electro-optical modulator using an optical signal. The optically modulated electrical carrier is then imposed on a pre-determined OAM mode using an optical OAM multiplexer, attenuated, and transmitted across a quantum channel. A receiver then receives the transmitted signal and demultiplexes it with an optical OAM demultiplexer to extract projections. The projections then undergo optical-to-electrical conversion using a coherent optical detector with an optical signal from a local oscillator. A resulting estimated electrical carrier is then demultiplexed into subcarriers.
    Type: Application
    Filed: February 15, 2018
    Publication date: August 16, 2018
    Inventors: Ivan Djordjevic, Ting Wang, Shaoliang Zhang
  • Publication number: 20180234139
    Abstract: Systems and methods for orbital angular momentum (OAM)-based multidimensional signaling with multiple-input-multiple-output (MIMO). The wireless communication is achieved using a transmitter including a plurality of orthogonal pulse shapers of a multidimensional modulator, the plurality of orthogonal pulse shapers generating a multidimensional modulated signal by imposing one or more data sequences on corresponding mutually orthogonal filter impulse responses derived from multiple orthogonal basis functions including Slepian sequences. An OAM antenna array including OAM antenna elements is used such that each of the OAM antenna elements includes an azimuthal phase shifter for shifting an azimuthal phase term of a wavefront generated by an antenna element such that the OAM antenna elements impose the multidimensional modulated signal on pre-determined OAM modes of a carrier signal corresponding to the azimuthal phase term.
    Type: Application
    Filed: February 15, 2018
    Publication date: August 16, 2018
    Inventors: Ivan Djordjevic, Ting Wang, Shaoliang Zhang
  • Patent number: 10018558
    Abstract: A system and method are provided for distributed acoustic sensing in a multicore optical fiber. The system includes a transmitter for simultaneously propagating a sequence of M light pulses through the multicore optical fiber using a spatial mode selected from a set of N spatial modes provided by a spatial mode selector for the transmitter that is coupled to an input to the multicore optical fiber, with M and N being respective integers greater than one. The system further includes a receiver for receiving the sequence of M light pulses at an output of the multicore optical fiber and detecting an environmental perturbation in the multicore optical fiber based on an evaluation of a propagation of the sequence of M light pulses through the multicore optical fiber.
    Type: Grant
    Filed: August 16, 2017
    Date of Patent: July 10, 2018
    Assignee: NEC Corporation
    Inventors: Fatih Yaman, Giovanni Milione, Shaoliang Zhang, Yue-Kai Huang
  • Publication number: 20180136016
    Abstract: Methods and systems for Brillouin optical time-domain reflectometry include optically filtering out non-Brillouin signals reflected from a fiber. Brillouin signals reflected from the fiber are coupled with a local oscillator to produce a Brillouin shift signals. The Brillouin shift signals are converted to an electrical domain using a photodetector. The electrical Brillouin shift signals are converted to a digital domain using a low-speed analog-to-digital converter that has a sampling rate below a Nyquist rate sufficient to fully resolve the electrical Brillouin shift signals.
    Type: Application
    Filed: November 13, 2017
    Publication date: May 17, 2018
    Inventors: Fatih Yaman, Shaoliang Zhang, Ezra Ip, Yue-Kai Huang, Giovanni Milione
  • Patent number: 9966975
    Abstract: Systems and methods are disclosed for optically communicating data by, at a transmitter side, encoding a block of input bits by one or more outer encoders, and after interleaving the encoded bits, permuting the encoded bits according to a predetermined sequence or order, and further encoding the encoded bits by an inner encoder, and at a receiver side, decoding received bits with an inner decoder, and after the encoded bits are permuted, subsequently decoding by and outer decoder, and returning information bits at an outer decoder as an output. The soft-decision and hard-decision outputs from the outer BCH code help the inner LDPC decoder to have better estimation of the received bits and gain performance. The performance in higher-order modulation formats could be as large as 0.5 dB in one embodiment.
    Type: Grant
    Filed: October 6, 2016
    Date of Patent: May 8, 2018
    Assignee: NEC Corporation
    Inventors: Shaoliang Zhang, Fatih Yaman, Wei Zhou
  • Publication number: 20180109067
    Abstract: An optical communication substrate includes a plurality of cores to communicate optical signals; a rectangular input delivering a pump laser, and a shaped portion to combine the optical signals and the pump laser into a ring geometry at an output.
    Type: Application
    Filed: May 3, 2017
    Publication date: April 19, 2018
    Inventors: Fatih Yaman, Shaoliang Zhang, Eduardo Mateo Rodriquez, Takanori Inoue, Yoshihisa Inada, Takaaki Ogata
  • Publication number: 20180102626
    Abstract: An unrepeatered transmission system includes a receiver coupled to a receive span; a transmitter coupled to the receive span; and a plurality of cascaded amplifiers in the receive span with dedicated fiber cores to supply one or more optical pumps from the receiver to each amplifier, wherein the plurality of cascaded amplifiers increase system reach by increasing the length of a back span in an unrepeatered link.
    Type: Application
    Filed: October 4, 2017
    Publication date: April 12, 2018
    Inventors: Ezra Ip, Yue-Kai Huang, Fatih Yaman, Shaoliang Zhang
  • Publication number: 20180102791
    Abstract: Systems and methods for data transport in optical communications systems, including a transmitter for encoding a received information sequence by constructing an outer and inner quasi cyclic-low-density parity check (QC-LDPC) code. The encoding includes dividing the received information sequence into a plurality of messages of equal length, encoding each of the messages into a codeword to generate a plurality of outer codewords, cascading the plurality of outer codewords to generate a bit sequence, and executing inner encoding to encode each of the plurality of outer codewords into codewords in QC-LDPC inner code. A receiver decodes a received data stream based on the QC-LDPC inner code using two-phase decoding including iteratively performing at least one of inner/outer and outer/inner decoding until a threshold condition is reached.
    Type: Application
    Filed: October 10, 2017
    Publication date: April 12, 2018
    Inventors: Shaoliang Zhang, Fatih Yaman, Ting Wang, Yoshihisa Inada
  • Publication number: 20180102851
    Abstract: Systems and methods for data transport in an optical communications system, including generating a pairwise optimized (PO) multi-dimensional signal constellation in a single stage. The PO multi-dimensional signal constellation is generated by selecting a pair of symbols from a received constellation with M symbols, defining and minimizing an objective function with one or more constraints to optimize the selected pair of symbols, and iteratively selecting and optimizing one or more different pairs of symbols from the received constellation until a threshold condition is reached. Neighbor symbols from the generated PO multi-dimensional signal constellation in each polarization are clustered to formulate a clustered PO multi-dimensional signal constellation, and data is modulated and transmitted in accordance with the clustered PO multi-dimensional signal constellation.
    Type: Application
    Filed: October 10, 2017
    Publication date: April 12, 2018
    Inventors: Shaoliang Zhang, Fatih Yaman, Eduardo Mateo Rodriquez, Yoshihisa Inada
  • Publication number: 20180052102
    Abstract: A system and method are provided for distributed acoustic sensing in a multicore optical fiber. The system includes a transmitter for simultaneously propagating a sequence of M light pulses through the multicore optical fiber using a spatial mode selected from a set of N spatial modes provided by a spatial mode selector for the transmitter that is coupled to an input to the multicore optical fiber, with M and N being respective integers greater than one. The system further includes a receiver for receiving the sequence of M light pulses at an output of the multicore optical fiber and detecting an environmental perturbation in the multicore optical fiber based on an evaluation of a propagation of the sequence of M light pulses through the multicore optical fiber.
    Type: Application
    Filed: August 16, 2017
    Publication date: February 22, 2018
    Inventors: Fatih Yaman, Giovanni Milione, Shaoliang Zhang, Yue-Kai Huang
  • Publication number: 20180052041
    Abstract: A system and method are provided for distributed acoustic sensing in a multimode optical fiber. The system includes a transmitter for simultaneously propagating a sequence of M light pulses through the multimode optical fiber using a spatial mode selected from a set of N spatial modes provided by a spatial mode selector for the transmitter that is coupled to an input to the multimode optical fiber, with M and N being respective integers greater than one. The system further includes a receiver for receiving the sequence of M light pulses at an output of the multimode optical fiber and detecting an environmental perturbation in the multimode optical fiber based on an evaluation of a propagation of the sequence of M light pulses through the multimode optical fiber.
    Type: Application
    Filed: August 16, 2017
    Publication date: February 22, 2018
    Inventors: Fatih Yaman, Giovanni Milione, Shaoliang Zhang, Yue-Kai Huang
  • Patent number: 9887729
    Abstract: Systems and methods are disclosed for receiving data by radio frequency (RF) mixing to down-convert in-phase and quadrature parts of a photo-detected electrical RF band signal to baseband for data conversion; controlling a mixing phase of a electrical local oscillator (LO) at one or more RF mixing modules; selecting one of the RF sub-bands to be down-converted to baseband after coherent photo-detection; and performing RF sub-band de-multiplexing for ultra-wide band optical digital coherent detection.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: February 6, 2018
    Assignee: NEC Corporation
    Inventors: Yue-Kai Huang, Shaoliang Zhang
  • Patent number: 9866928
    Abstract: Systems and methods are disclosed for data communication by performing RF sub-band multiplexing and demultiplexing by cascading a radio-frequency (RF) mixing module and optical dual-polarized (DP) QPSK modulator forhybrid RF/optical IQ modulation; and performing intra-transceiver optical superchannel switching through the RF sub-band multiplexing.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: January 9, 2018
    Assignee: NEC Corporation
    Inventors: Yue-Kai Huang, Shaoliang Zhang, Fatih Yaman, Ting Wang