US 12,247,871 B2
Superconducting single-photon detection system
Shigehito Miki, Koganei (JP); and Hirotaka Terai, Koganei (JP)
Assigned to NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY, Koganei (JP)
Appl. No. 18/292,490
Filed by National Institute of Information and Communications Technology, Koganei (JP)
PCT Filed Jul. 28, 2022, PCT No. PCT/JP2022/029097
§ 371(c)(1), (2) Date Jan. 26, 2024,
PCT Pub. No. WO2023/008523, PCT Pub. Date Feb. 2, 2023.
Claims priority of application No. 2021-125958 (JP), filed on Jul. 30, 2021.
Prior Publication US 2024/0344882 A1, Oct. 17, 2024
Int. Cl. G01J 1/44 (2006.01); G01J 1/04 (2006.01)
CPC G01J 1/44 (2013.01) [G01J 1/0425 (2013.01); G01J 2001/442 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A superconducting single-photon detection system comprising:
a plurality of optical transmission paths through each of which a photon emitted from a light source is transmitted;
a plurality of superconducting single-photon detectors (hereinafter referred to as “SSPDs”) that are independent of each other and in one-to-one correspondence with the optical transmission paths; and
a superconducting logic circuit that multiplexes first pulse signals output from the SSPDs, wherein
a photon entry time at which the photon enters each of the SSPDs through a corresponding one of the optical transmission paths is different for each of the optical transmission paths, and
a difference in the photon entry time between the optical transmission paths is greater than a pulse width of a corresponding one of second pulse signals output from the superconducting logic circuit.