公开(公告)号：US20240297722A1

公开(公告)日：2024-09-05

申请号：US18682917

申请日：2022-08-12

Applicant: QUDOOR TECHNOLOGIES INC.

Inventor： Liuping CHEN ,  Yongsheng FAN ,  Qibing WANG ,  Xiangkui WAN ,  Nan LI ,  Zhenyang JIN

IPC: H04B10/70 ,  G01J1/44 ,  H04L9/08

CPC classification number: H04B10/70 ,  G01J1/44 ,  H04L9/0858 ,  G01J2001/442 ,  G01J2001/444

Abstract: The disclosure provides a gating apparatus for a single-photon detector and a quantum communication device. The gating apparatus includes: a system synchronization unit, configured to obtain a periodic gating signal synchronized with a clock of a quantum communication system; a clock distributor, configured to divide the periodic gating signal into two periodic gating signals; a delay unit, configured to delay one periodic gating signal of the two periodic gating signals, so that the one periodic gating signal and the other periodic gating signal of the two periodic gating signals are spaced apart by predetermined duration; and a logical OR gate, configured to perform an OR operation on the one periodic gating signal delayed and the other periodic gating signal undelayed of the two periodic gating signals, so as to generate a periodic gating signal sequence synchronized with the clock of the quantum communication system.

公开(公告)号：US20240372630A1

公开(公告)日：2024-11-07

申请号：US18682915

申请日：2022-08-12

Applicant: QUDOOR TECHNOLOGIES INC.

Inventor： Liuping CHEN ,  Yongsheng FAN ,  Xiangkui WAN ,  Zhenyang JIN ,  Qibing WANG ,  Xihui YANG

IPC: H04B10/70

Abstract: Provided in the present disclosure are a gating apparatus for a single-photon detector, and a quantum communication device. The gating apparatus comprises: a system synchronization unit configured to acquire a clock of a quantum communication system; and a programmable controller configured to generate at least one periodic gating signal sequence that are synchronized with the clock of the quantum communication system, wherein gating signals in each gating signal sequence are spaced apart from each other by a predetermined duration, such that a single-photon detector can operate in a corresponding Geiger mode for a received optical pulse, and the predetermined duration is an optical path difference between a long arm and a short arm of an unequal-arm interferometer that is used for performing phase encoding in the quantum communication system.