CV QKD system using optical interferometer phase lock scheme for optical homodyne detection

摘要

The present invention relates to a continuous variable quantum encryption key distribution system for performing phase stabilization of an optical interferometer for detecting optical homodyne, and the continuous variable quantum encryption key distribution system of the present invention provides continuous light according to data of a transmission target encryption key. A transmitter that generates optical pulses of quantum state data using; And dividing the optical pulse received from the quantum channel into two paths, fixing the phase with a predetermined phase difference with respect to the two signals having a time difference of one period of the optical pulse, and detecting a bit from the synthesized signals again. And a receiver for generating information, wherein the optical pulse includes a pilot pulse of the same amplitude whose phase changes periodically, and the receiver performs the phase lock using the pilot pulse.