Patent ID: 11962689
Assignee: EAGLE TECHNOLOGY, LLC
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. A quantum communications system comprising:
a communications system; and
a quantum key distribution (QKD) system operable with the communications system and comprising
the transmitter node comprising
a pulse transmitter,
a pulse divider downstream from the pulse transmitter configured to divide each pulse having a plurality of X photons into a plurality of Y time bins with Y>X, and
at least one first waveplate upstream from the pulse divider and configured to alter a polarization state of pulses travelling therethrough;

the receiver node comprising
at least one second waveplate being a conjugate of the at least one first waveplate,
a pulse recombiner upstream from the at least one second waveplate, and
a pulse receiver downstream from the at least one second waveplate.