FIELD: optical communication systems.
SUBSTANCE: invention relates to single-photon sources of optical radiation and can be used to create highly secure systems for transmitting information based on the principle of quantum cryptography. Single photon source, including a piece of multi-core fiber with cut ends of cores on one side, to which variable attenuators are connected, except for one central core, having an additional optical output from the opposite end, to which a pulse-periodic photon source is connected through a variable attenuator.
EFFECT: high efficiency of the single photon source.
4 cl, 3 dwg
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