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:
Aug. 27, 2024
Filed:
Jun. 17, 2020
Kt Corporation, Gyeonggi-do, KR;
KT CORPORATION, Gyeonggi-do, KR;
Abstract
Provided are a quantum key distribution method, device, and system. The quantum key distribution system may include a transmitter configured to split an optical signal into a first optical signal passing through a first path (P) and a second optical signal passing through a second path (P), which is longer than the first path (P), and to sequentially transmit the first optical signal and the second optical signal; and a receiver configured to receive the first optical signal and the second optical signal incident through a quantum channel and transmit the first optical signal and the second optical signal back to the transmitter through the quantum channel after passing through a polarization-dependent element, being reflected by a Faraday mirror, and passing through the polarization-dependent element again.