Patents by Inventor Colin Lualdi

Colin Lualdi 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
    Patent number: 10666433
    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, wherein the photon emitter is coupled to the photon receiver by at least one quantum channel. The photon receiver includes the first polarization optic configured to output a polarization state of the emitted photon. The first photodetector is configured to detect the photon emitted 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 quantum cryptography apparatus may be a quantum key distribution system for characterizing backflashes.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: May 26, 2020
    Assignee: The MITRE Corporation
    Inventors: Daniel Stack, Stephen Pappas, Brandon Rodenburg, Colin Lualdi
  • QUANTUM KEY DISTRIBUTION INFORMATION LEAKAGE DUE TO BACKFLASHES IN SINGLE PHOTON AVALANCHE PHOTODIODES
    Publication number: 20190190706
    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, wherein the photon emitter is coupled to the photon receiver by at least one quantum channel. The photon receiver includes the first polarization optic configured to output a polarization state of the emitted photon. The first photodetector is configured to detect the photon emitted 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 quantum cryptography apparatus may be a quantum key distribution system for characterizing backflashes.
    Type: Application
    Filed: September 12, 2017
    Publication date: June 20, 2019
    Inventors: Daniel T. Stack, Stephen Pappas, Brandon Rodenburg, Colin Lualdi