The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 01, 2022
Filed:
May. 02, 2018
Universite DE Geneve, Geneva, CH;
Hugo Zbinden, Geneva, CH;
Boris Korzh, Flint, GB;
Charles Lim, Singapore, SG;
Gianluca Boso, Bernex, CH;
UNIVERSITE DE GENEVE, Geneva, CH;
Abstract
The invention relates to a Quantum Key Distribution system comprising a transmitterand a receiverfor exchanging a quantum key via a quantum channelthrough a decoy-state three state protocol wherein the transmitter comprises a transmitter processing unitadapted to use random numbers from a quantum random generator to select a quantum state to encode from different states of intensity and basis, a Pulsed light sourceadapted to generate an optical pulse, a time-bin interferometerthrough which the generated optical pulse passes and which transforms generated optical pulse into two coherent pulses separated by the time bin duration, a single intensity modulatoradapted to change the intensity of the two pulses individually according to the choice made by the transmitter processing unit, and a variable optical attenuatoradapted to reduce the overall signal intensity to the optimum photon number per pulse.