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:
Nov. 11, 2025
Filed:
Mar. 11, 2022
Politecnico Di Milano, Milan, IT;
Mario Martinelli, Milan, IT;
POLITECNICO DI MILANO, Milan, IT;
Abstract
A modular quantum key distribution system and relative modulation module and demodulation module. The system includes: a photon source module; a modulation module, physically separated from the source module and operatively connected to the source module by a first optical communication channel and including a first polarization stabilizer and a first retarder plate and a second retarder plate, placed downstream of the first polarization stabilizer and controlled by an actuator; and a receiving unit operatively connected to the modulation module by a second optical communication channel and including a second polarization stabilizer, a third retarder plate, placed downstream of the second polarization stabilizer and controlled by an actuator, a polarizing beam splitter, placed downstream of the third retarder plate, and a single photon photodetector configured to detect a logic state of each photon and transmit the detected logic state to a counting register.