Patents by Inventor Michael Brodsky

Michael Brodsky 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).

  • Patent number: 10693565
    Abstract: Methods and apparatuses are provided that compensate for the polarization dependent loss (PDL) of fiber-optic quantum channels. Compensation is accomplished by inserting a compensating PDL into another quantum channel carrying entangled photons that are entangled with photons in the first channel having losses that are to be compensated for. By selecting the optimum magnitude and orientation for the compensating PDL, compensation for the PDL in the first channel is maximized.
    Type: Grant
    Filed: September 16, 2019
    Date of Patent: June 23, 2020
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Brian T. Kirby, Daniel E. Jones, Michael Brodsky
  • Publication number: 20200177977
    Abstract: A quantum key distribution system is deployed in an optical fiber network transporting classical data traffic. A source of entangled photon pairs is used to generate quantum keys. Classical data traffic is typically transported over channels in the C-band. If a pair of channels for transport of quantum data is available within the C-band, then the source of entangled photon pairs is tuned to emit in a pair of channels in the C-band. If a pair of channels for transport of quantum data is not available within the C-band, then the source of entangled photon pairs is tuned to emit in a pair of channels in a combined S-band and L-band. When a periodically-poled lithium niobate waveguide pumped with a laser is used for the source of entangled photon pairs, the output spectral properties are tuned by varying the temperature of the waveguide.
    Type: Application
    Filed: February 3, 2020
    Publication date: June 4, 2020
    Applicant: AT&T Intellectual Property I, L.P.
    Inventors: Michael Brodsky, Cristian Antonelli, Jungmi Oh
  • Publication number: 20200145115
    Abstract: Methods and apparatuses are provided that compensate for the polarization dependent loss (PDL) of fiber-optic quantum channels. Compensation is accomplished by inserting a compensating PDL into another quantum channel carrying entangled photons that are entangled with photons in the first channel having losses that are to be compensated for. By selecting the optimum magnitude and orientation for the compensating PDL, compensation for the PDL in the first channel is maximized.
    Type: Application
    Filed: September 16, 2019
    Publication date: May 7, 2020
    Inventors: Brian T. Kirby, Daniel E. Jones, Michael Brodsky
  • Patent number: 10595102
    Abstract: A quantum key distribution system is deployed in an optical fiber network transporting classical data traffic. A source of entangled photon pairs is used to generate quantum keys. Classical data traffic is typically transported over channels in the C-band. If a pair of channels for transport of quantum data is available within the C-band, then the source of entangled photon pairs is tuned to emit in a pair of channels in the C-band. If a pair of channels for transport of quantum data is not available within the C-band, then the source of entangled photon pairs is tuned to emit in a pair of channels in a combined S-band and L-band. When a periodically-poled lithium niobate waveguide pumped with a laser is used for the source of entangled photon pairs, the output spectral properties are tuned by varying the temperature of the waveguide.
    Type: Grant
    Filed: April 3, 2018
    Date of Patent: March 17, 2020
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Michael Brodsky, Cristian Antonelli, Jungmi Oh
  • Patent number: 10554312
    Abstract: Methods and systems for measuring interferometric visibility of telescopic signals using resources having imperfect quantum entanglement are disclosed. The novel methodology employed by embodiments of the present invention takes into account the difficulty in creating entanglement between distance telescopes, and describes how to incorporate problems associated with distributing quantum entanglement into the measurement procedure. This allows the distance that two telescopes in an optical array are spaced apart to be increased while still interacting.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: February 4, 2020
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Siddhartha Santra, Brian T. Kirby, Vladimir S. Malinovsky, Michael Brodsky
  • Publication number: 20190376820
    Abstract: A novel methodology for characterizing and calibrating an entangled photon distribution system is disclosed. The entangled photon distribution system includes at least a source of entangled photon pairs, two photon detectors which detect photons among two channels and a controller. The methodology includes: for at least two different operational setting levels of the source of entangled photon pairs, measuring count rates for photons detected by the two photon detectors, individually and coincidently; fitting the measured individual and coincidence count rate data for the at least two different operational setting levels with theoretical models of detection probability; and determining operational parameters of the system from the fitting.
    Type: Application
    Filed: June 7, 2018
    Publication date: December 12, 2019
    Inventors: Daniel E. Jones, Brian T. Kirby, Michael Brodsky
  • Patent number: 10502619
    Abstract: Operational parameters of a single-photon detector are determined with a continuous wave laser source. At a fixed trigger, a dark count probability and a series of count probabilities at different optical powers are determined. A particular optical power is selected by using a wide-range variable attenuator to attenuate the optical power of the continuous wave laser. The dark count probability and the count probabilities are determined for different trigger rates. The operational parameters include efficiency, afterpulsing constant, and detrap time. The operational parameters are computed by fitting the computed dark count probabilities and count probabilities to a user-defined relationship.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: December 10, 2019
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: Michael Brodsky, Cristian Antonelli, Jungmi Oh
  • Publication number: 20190349094
    Abstract: Methods and systems for measuring interferometric visibility of telescopic signals using resources having imperfect quantum entanglement are disclosed. The novel methodology employed by embodiments of the present invention takes into account the difficulty in creating entanglement between distance telescopes, and describes how to incorporate problems associated with distributing quantum entanglement into the measurement procedure. This allows the distance that two telescopes in an optical array are spaced apart to be increased while still interacting.
    Type: Application
    Filed: May 14, 2018
    Publication date: November 14, 2019
    Inventors: Siddhartha Santra, Brian T. Kirby, Vladimir S. Malinovsky, Michael Brodsky
  • Publication number: 20190196011
    Abstract: The present invention relates to a lightweight, high resolution portable ultrasound system using components and methods to improve connectivity and ease of use. A preferred embodiment includes an integrated system in which the beamformer control circuitry can be inserted into the host computer as a peripheral or within the processor housing.
    Type: Application
    Filed: November 21, 2018
    Publication date: June 27, 2019
    Inventors: Michael Brodsky, Alice M. Chiang, David Christopher Maurer, William M. Wong
  • Patent number: 10225080
    Abstract: Quantum networking systems and methods for routing entangled photons pairs are described herein. One quantum networking system includes entangled photon sources which generate entangled photons; optical output ports; a reconfigurable switching network connecting to the entangled photon sources and the output ports, which include a regular repeating structure of optical crossbar switches and interconnections for selectively routing individual ones of entangled photons pairs input to the network to and amongst the outputs; and a control module. The control module is configured to receive a request for entangled photons at the output ports; execute a routing algorithm to determine the state of the switches in the reconfigurable switching network to satisfy the request; and generate and transmit control signals to the switching network in order to set the states of the switches according to the executed routing algorithm. The reconfigurable switching network may be a BeneŇ° or a banyan-type network architecture.
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: March 5, 2019
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Robert James Drost, Terrence Joseph Moore, Michael Brodsky
  • Patent number: 10193637
    Abstract: A method for determining a network configuration for the delivery of entangled photons individually to a plurality of users, the network comprising a plurality of inputs, switches, and outputs operatively connected by optical fibers; the plurality of switches being switchable between two states; the method comprising: determining the minimum number of switches necessary to deliver entangled photon pairs from a predetermined number of sources to a predetermined number of users, minimizing the loss experienced by an entangled photon passing through the switches by minimizing the number of switches that any one photon passes through by selecting only nondominated switch configurations; determining the minimum number of equivalent network switch configurations and eliminating all but one of the equivalent network switch configurations; and selecting an optimum network configuration by which the plurality of inputs and the plurality of outputs are operatively interconnected using a minimum number of switches in
    Type: Grant
    Filed: January 19, 2016
    Date of Patent: January 29, 2019
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Robert J. Drost, Michael Brodsky
  • Patent number: 10139489
    Abstract: The present invention relates to a lightweight, high resolution portable ultrasound system using components and methods to improve connectivity and ease of use. A preferred embodiment includes an integrated system in which the beamformer control circuitry can be inserted into the host computer as a peripheral or within the processor housing.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: November 27, 2018
    Assignee: Teratech Corporation
    Inventors: Michael Brodsky, Alice M. Chiang, David Maurer, William M. Wong
  • Publication number: 20180227651
    Abstract: A quantum key distribution system is deployed in an optical fiber network transporting classical data traffic. A source of entangled photon pairs is used to generate quantum keys. Classical data traffic is typically transported over channels in the C-band. If a pair of channels for transport of quantum data is available within the C-band, then the source of entangled photon pairs is tuned to emit in a pair of channels in the C-band. If a pair of channels for transport of quantum data is not available within the C-band, then the source of entangled photon pairs is tuned to emit in a pair of channels in a combined S-band and L-band. When a periodically-poled lithium niobate waveguide pumped with a laser is used for the source of entangled photon pairs, the output spectral properties are tuned by varying the temperature of the waveguide.
    Type: Application
    Filed: April 3, 2018
    Publication date: August 9, 2018
    Applicant: AT&T Intellectual Property I, L.P.
    Inventors: Michael Brodsky, Cristian Antonelli, Jungmi Oh
  • Publication number: 20180152295
    Abstract: Quantum networking systems and methods for routing entangled photons pairs are described herein. One quantum networking system includes entangled photon sources which generate entangled photons; optical output ports; a reconfigurable switching network connecting to the entangled photon sources and the output ports, which include a regular repeating structure of optical crossbar switches and interconnections for selectively routing individual ones of entangled photons pairs input to the network to and amongst the outputs; and a control module. The control module is configured to receive a request for entangled photons at the output ports; execute a routing algorithm to determine the state of the switches in the reconfigurable switching network to satisfy the request; and generate and transmit control signals to the switching network in order to set the states of the switches according to the executed routing algorithm. The reconfigurable switching network may be a BeneŇ° or a banyan-type network architecture.
    Type: Application
    Filed: May 9, 2017
    Publication date: May 31, 2018
    Inventors: Robert James Drost, Terrence Joseph Moore, Michael Brodsky
  • Patent number: 9980740
    Abstract: A system for treating tissue includes a device including a first member and a second member arranged to move relative to the first member to treat tissue. The system also includes a processor configured to automatically control movement of the second member relative to the first member using position control methodology. A method of treating tissue includes providing a device having a first member and a second member arranged to move relative to the first member, moving the second member relative to the first member, and automatically controlling the movement of the second member using position control methodology.
    Type: Grant
    Filed: April 15, 2015
    Date of Patent: May 29, 2018
    Assignee: Smith & Nephew, Inc.
    Inventors: Kenneth W. Krause, Kenneth R. Woodland, Michael S. Garcia, Michael A. Brodsky, Uday Hegde, Melanie Meier, Elangovan Ramanathan
  • Patent number: 9967637
    Abstract: A quantum key distribution system is deployed in an optical fiber network transporting classical data traffic. A source of entangled photon pairs is used to generate quantum keys. Classical data traffic is typically transported over channels in the C-band. If a pair of channels for transport of quantum data is available within the C-band, then the source of entangled photon pairs is tuned to emit in a pair of channels in the C-band. If a pair of channels for transport of quantum data is not available within the C-band, then the source of entangled photon pairs is tuned to emit in a pair of channels in a combined S-band and L-band. When a periodically-poled lithium niobate waveguide pumped with a laser is used for the source of entangled photon pairs, the output spectral properties are tuned by varying the temperature of the waveguide.
    Type: Grant
    Filed: January 2, 2014
    Date of Patent: May 8, 2018
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: Michael Brodsky, Cristian Antonelli, Jungmi Oh
  • Publication number: 20170356797
    Abstract: Operational parameters of a single-photon detector are determined with a continuous wave laser source. At a fixed trigger, a dark count probability and a series of count probabilities at different optical powers are determined. A particular optical power is selected by using a wide-range variable attenuator to attenuate the optical power of the continuous wave laser. The dark count probability and the count probabilities are determined for different trigger rates. The operational parameters include efficiency, afterpulsing constant, and detrap time. The operational parameters are computed by fitting the computed dark count probabilities and count probabilities to a user-defined relationship.
    Type: Application
    Filed: August 29, 2017
    Publication date: December 14, 2017
    Applicant: AT&T Intellectual Property I, L.P.
    Inventors: Michael Brodsky, Cristian Antonelli, Jungmi Oh
  • Patent number: 9772223
    Abstract: Operational parameters of a single-photon detector are determined with a continuous wave laser source. At a fixed trigger, a dark count probability and a series of count probabilities at different optical powers are determined. A particular optical power is selected by using a wide-range variable attenuator to attenuate the optical power of the continuous wave laser. The dark count probability and the count probabilities are determined for different trigger rates. The operational parameters include efficiency, afterpulsing constant, and detrap time. The operational parameters are computed by fitting the computed dark count probabilities and count probabilities to a user-defined relationship.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: September 26, 2017
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Michael Brodsky, Cristian Antonelli, Jungmi Oh
  • Patent number: D879811
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: March 31, 2020
    Assignee: Magic Leap, Inc.
    Inventors: Javier Antonio Busto, Jeremy Vanhoozer, Jonathan Brodsky, Michael Laufbahn
  • Patent number: D892133
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: August 4, 2020
    Assignee: Magic Leap, Inc.
    Inventors: Javier Antonio Busto, Jeremy Vanhoozer, Jonathan Brodsky, Michael Laufbahn