Patent ID: 11936782
Assignee: ARIZONA BOARD OF REGENTS ON BEHALF OF NORTHERN ARIZONA UNIVERSITY
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 1:
2. The method of claim 1, wherein decoding the datastream using the wavelength and polarization of each of the polarized photon comprises:
performing the polarization measurement on a first portion of the incoming photons according to the first measurement basis and on a second portion of the incoming photons according to the second measurement basis for each wavelength;
determining, according to the polarization measurement, a number erratic of photons of the first portion having the second wavelength having a measured polarization axis that differs from an expected polarization axis of the first measurement basis for the second wavelength;
determining, according to the polarization measurement, a number of erratic photons of the second portion having the first wavelength that have a measured polarization axis that differs from an expected polarization axis of the first measurement basis for the second wavelength; and
wherein generating the signal indicating whether at least a portion of the datastream was altered includes causing the signal to indicate whether a sum of the number of erratic photons of the first portion and the number of erratic photons of the second portion exceeds a predetermined threshold.