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. 25, 2025
Filed:
Feb. 03, 2022
Eutelsat S a, Issy-les-Moulineaux, FR;
Nederlandse Organisatie Voor Toegepast-natuurwetenschappelijk Onderzoek (Tno), The Hague, NL;
Alessandro Le Pera, Issy-les-Moulineaux, FR;
Daniele Vito Finocchiaro, Issy-les-Moulineaux, FR;
Bob Petrus Franciscus Dirks, Leiden, NL;
Ivan Ferrario, Delft, NL;
EUTELSAT SA, Issy-les-Moulineaux, FR;
NEDERLANDSE ORGANISATIE VOOR TOEGEPAST-NATUURWETENSCHAPPELIJK ONDERZOEK (TNO), s-Gravenhage, NL;
Abstract
An Entangled photons distribution and measurement system includes a photon source including two outputs, able to generate a pair of entangled photons, the first photon being emitted on the first output and the second photon on the second output, a first optical link connected to the first output of the photons source, to deliver the entangled photons to a first device, an optical switch to route photons from the second output of the photons source to the first or second output of the optical switch, a second optical link connected to the first output of the optical switch, to deliver the entangled photons to a second device, and a measurement device connected to the second output of the optical switch, wherein the optical switch is configured to switch between its first and second output to switch between two operating modes.