Patents by Inventor Davide Marangon

Davide Marangon 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: 20240340088
    Abstract: A combining unit for combining a first optical input and a second optical input, the first optical input comprising a first polarisation maintaining fibre “PMF” having a fast optical axis and a slow optical axis, the second optical input comprising a second PMF having a fast optical axis and a slow optical axis, the combining unit being configured to combine the first optical input with the second optical input in free space such that the fast and slow optical axis of the first PMF and the second PMF are rotated with respect to one another by a non-zero angle to produce a combined signal.
    Type: Application
    Filed: February 28, 2023
    Publication date: October 10, 2024
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Thomas ROGER, Chithrabhanu PERUMANGATT, Mirko SANZARO, Davide MARANGON, Ravinder SINGH, Andrew James SHIELDS
  • Patent number: 11709657
    Abstract: An optical device for a quantum random number generator comprising: a source of phase randomised pulses of light, the source of phase randomised pulses of light further comprising a plurality of gain-switched lasers, each gain-switched laser having an output, and each gain-switched laser being configured to emit a stream of pulses such that the phase of each pulse in the stream of pulses is randomised, and an optical pulse combiner, the optical pulse combiner being configured to receive streams of pulses from the output of each gain-switched laser, combine the streams of pulses with one another into a combined stream of pulses and direct the combined stream of pulses into at least one output of the optical pulse combiner, the at least one output of the optical pulse combiner being the output of the source of phase randomised pulses of light; wherein the source of phase randomised pulses of light is configured such that the streams of pulses of light emitted by the plurality of gain-switched lasers are tem
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: July 25, 2023
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Taofiq Paraiso, Davide Marangon, Thomas Roger, Zhiliang Yuan, Andrew Shields
  • Publication number: 20200301669
    Abstract: An optical device for a quantum random number generator comprising: a source of phase randomised pulses of light, the source of phase randomised pulses of light further comprising a plurality of gain-switched lasers, each gain-switched laser having an output, and each gain-switched laser being configured to emit a stream of pulses such that the phase of each pulse in the stream of pulses is randomised, and an optical pulse combiner, the optical pulse combiner being configured to receive streams of pulses from the output of each gain-switched laser, combine the streams of pulses with one another into a combined stream of pulses and direct the combined stream of pulses into at least one output of the optical pulse combiner, the at least one output of the optical pulse combiner being the output of the source of phase randomised pulses of light; wherein the source of phase randomised pulses of light is configured such that the streams of pulses of light emitted by the plurality of gain-switched lasers are tem
    Type: Application
    Filed: February 28, 2020
    Publication date: September 24, 2020
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Taofiq PARAISO, Davide MARANGON, Thomas ROGER, Zhiliang YUAN, Andrew SHIELDS
  • Patent number: 10784651
    Abstract: An apparatus for measuring an input signal, the apparatus comprising: a first light source configured to output a sequence of pulses of light, wherein there is a random relationship between the phase of the pulses; a beam splitter having first and second inputs and first and second outputs, said first input being arranged to receive light pulses from said first light source and the second input being arranged to receive said input signal; a differencing circuit adapted to subtract signals obtained from the first and second outputs from each other; and output a value; and a processing circuit adapted to estimate the minimum entropy of said input signal, from the output of the differencing circuit corresponding to a sequence of said light pulses from the first light source.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: September 22, 2020
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Davide Marangon, Zhiliang Yuan, Marco Lucamarini, Andrew James Shields
  • Publication number: 20190393675
    Abstract: An apparatus for measuring an input signal, the apparatus comprising: a first light source configured to output a sequence of pulses of light, wherein there is a random relationship between the phase of the pulses; a beam splitter having first and second inputs and first and second outputs, said first input being arranged to receive light pulses from said first light source and the second input being arranged to receive said input signal; a differencing circuit adapted to subtract signals obtained from the first and second outputs from each other; and output a value; and a processing circuit adapted to estimate the minimum entropy of said input signal, from the output of the differencing circuit corresponding to a sequence of said light pulses from the first light source.
    Type: Application
    Filed: June 25, 2019
    Publication date: December 26, 2019
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Davide Marangon, Zhiliang Yuan, Marco Lucamarini, Andrew James Shields