公开(公告)号：US12231176B1

公开(公告)日：2025-02-18

申请号：US18924618

申请日：2024-10-23

Applicant: UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA

Inventor： Shuang Wang ,  Jiaxuan Li ,  Yuanguanjie Fan ,  Fengyu Lu ,  Zhenqiang Yin ,  Deyong He ,  Wei Chen ,  Zheng Zhou ,  Guangcan Guo ,  Zhengfu Han

IPC: H04B10/00 ,  H04B10/532 ,  H04B10/70 ,  H04J14/00

Abstract: A quantum key distribution system is provided, including: a sending terminal, a measurement terminal, a receiving terminal, and at least one polarization controller. The sending terminal is configured to generate a quantum optical signal and receive a detection result. The measurement terminal includes a beam splitter and two single-photon detectors, the beam splitter is configured to generate two measurement optical signals based on the quantum optical signal, and the two single-photon detectors are configured to generate the detection result. The receiving terminal is configured to receive the detection result. The at least one polarization controller is provided in the sending terminal, the measurement terminal or the receiving terminal, and performs a polarization processing on the quantum optical signal or the detection result using a target transmittance matrix determined based on the detection result, so as to obtain a polarized quantum optical signal or a polarized detection result.