FIELD: photon quantum coupling.
SUBSTANCE: device for transmitting quantum states consists of a sender unit, a quantum communication channel (1) connected to a sender unit, a first fiber spectral filter (2), connected to quantum communication channel, three-port fiber optic circulator (3), first port of which is connected to first fiber spectral filter, second port of fiber optic circulator is connected to second fiber spectral filter (4), fiber optic switch (5) connected to second fiber spectral filter, two photodetectors (6, 7) connected to a fiber optic switch, and single-photon detector (8) connected to a third port of the fiber optic circulator.
EFFECT: technical result of the disclosed device consists in detecting attacks with the imposition of operations on single-photon detector of photon quantum communication devices.
1 cl, 1 dwg
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