Patents by Inventor Stephen P. Pappas

Stephen P. Pappas 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).

  • QUANTUM KEY DISTRIBUTION INFORMATION LEAKAGE DUE TO BACKFLASHES IN SINGLE PHOTON AVALANCHE PHOTODIODES
    Publication number: 20210075602
    Abstract: A quantum cryptography apparatus and system includes a photon emitter, a photon receiver, a first photodetector, a second photodetector, a first polarization optic, and a second polarization optic. The photon emitter is configured to emit a photon at a wavelength. The photon receiver is coupled to the photon emitter by at least one quantum channel. The photon receiver includes the first polarization optic configured to output the emitted photon in a polarization state. The first photodetector is configured to detect the emitted photon from the output of the first polarization optic. The second photodetector is configured to detect a backflash from the first photodetector. The second polarization optic is between the first photodetector and the second photodetector. The second photodetector and the second polarization optic are configured to internally calibrate the photon receiver.
    Type: Application
    Filed: November 19, 2020
    Publication date: March 11, 2021
    Inventors: Daniel T. STACK, Stephen P. Pappas, Brandon V. Rodenburg, Colin P. Lualdi
  • Quantum key distribution information leakage due to backflashes in single photon avalanche photodiodes
    Patent number: 10855456
    Abstract: A quantum cryptography apparatus and system includes a photon emitter, a photon receiver, a first photodetector, a second photodetector, a first polarization optic, and a second polarization optic. The photon emitter is configured to emit a photon at a wavelength. The photon receiver is coupled to the photon emitter by at least one quantum channel. The photon receiver includes the first polarization optic configured to output the emitted photon in a polarization state. The first photodetector is configured to detect the emitted photon from the output of the first polarization optic. The second photodetector is configured to detect a backflash from the first photodetector. The second polarization optic is between the first photodetector and the second photodetector. The second photodetector and the second polarization optic are configured to internally calibrate the photon receiver.
    Type: Grant
    Filed: April 15, 2020
    Date of Patent: December 1, 2020
    Assignee: The MITRE Corporation
    Inventors: Daniel T. Stack, Stephen P. Pappas, Brandon V. Rodenburg, Colin P. Lualdi
  • QUANTUM KEY DISTRIBUTION INFORMATION LEAKAGE DUE TO BACKFLASHES IN SINGLE PHOTON AVALANCHE PHOTODIODES
    Publication number: 20200244449
    Abstract: A quantum cryptography apparatus and system includes a photon emitter, a photon receiver, a first photodetector, a second photodetector, a first polarization optic, and a second polarization optic. The photon emitter is configured to emit a photon at a wavelength. The photon receiver is coupled to the photon emitter by at least one quantum channel. The photon receiver includes the first polarization optic configured to output the emitted photon in a polarization state. The first photodetector is configured to detect the emitted photon from the output of the first polarization optic. The second photodetector is configured to detect a backflash from the first photodetector. The second polarization optic is between the first photodetector and the second photodetector. The second photodetector and the second polarization optic are configured to internally calibrate the photon receiver.
    Type: Application
    Filed: April 15, 2020
    Publication date: July 30, 2020
    Inventors: Daniel T. STACK, Stephen P. PAPPAS, Brandon V. RODENBURG, Colin P. LUALDI
  • Quantum sensor miniaturization utilizing entangled photon signals
    Patent number: 7928356
    Abstract: The resolution obtained by an imaging system utilizing separable photons can be achieved by an imaging system making use of entangled photons. Since resolution is not being increased from the separable-photon system, the imaging system utilizing entangled photons can take advantage of a smaller aperture. This results in a smaller and lighter system, which can be especially valuable in satellite imaging where weight and size play a vital role.
    Type: Grant
    Filed: November 14, 2008
    Date of Patent: April 19, 2011
    Assignee: The MITRE Corporation
    Inventors: Gerald N. Gilbert, Michael D. Hamrick, Yaakov S. Weinstein, Stephen P. Pappas, Anthony Donadio
  • Quantum Sensor Miniaturization Utilizing Entangled Photon Signals
    Publication number: 20100123091
    Abstract: The resolution obtained by an imaging system utilizing separable photons can be achieved by an imaging system making use of entangled photons. Since resolution is not being increased from the separable-photon system, the imaging system utilizing entangled photons can take advantage of a smaller aperture. This results in a smaller and lighter system, which can be especially valuable in satellite imaging where weight and size play a vital role.
    Type: Application
    Filed: November 14, 2008
    Publication date: May 20, 2010
    Applicant: The MITRE Corporation
    Inventors: Gerald N. Gilbert, Michael D. Hamrick, Yaakov S. Weinstein, Stephen P. Pappas, Anthony Donadio