公开(公告)号：US11009375B2

公开(公告)日：2021-05-18

申请号：US16002906

申请日：2018-06-07

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Daniel E. Jones ,  Brian T. Kirby ,  Michael Brodsky

IPC: G01J1/42 ,  G01D5/353 ,  H04L9/08 ,  H01S3/108 ,  H01S3/094 ,  G01N21/65

Abstract: A novel methodology for characterizing and calibrating an entangled photon distribution system is disclosed. The entangled photon distribution system includes at least a source of entangled photon pairs, two photon detectors which detect photons among two channels and a controller. The methodology includes: for at least two different operational setting levels of the source of entangled photon pairs, measuring count rates for photons detected by the two photon detectors, individually and coincidently; fitting the measured individual and coincidence count rate data for the at least two different operational setting levels with theoretical models of detection probability; and determining operational parameters of the system from the fitting. The determined operational parameters of the system include the rate of generated entangled photon pairs by the source, the rates of Raman-scattered photons generated in the first and second channels, respectively, and the efficiency of the two photon detectors, respectively.