FIELD: optical equipment.
SUBSTANCE: quantum state transmission device comprises a sender unit comprising a coherent radiation source, a fibre optic isolator, a fibre amplitude modulator, fibre beam splitter, fibre amplitude and phase modulators, polarization beam splitter, time delay, Faraday mirror, polarization-preserving fibre combiner, and control and synchronization unit, and a receiver unit comprising a polarization controller, a polarization beam splitter, a polarization beam splitter, a time delay, a Faraday mirror, 90-degree optical hybrid, two balanced detectors, control and synchronization unit, wherein the sender unit is connected to the receiver unit via a quantum channel and a synchronization channel.
EFFECT: high rate of generating a secret key.
1 cl, 1 dwg
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