FIELD: devices for quantum communication.
SUBSTANCE: device for multiplexing/demultiplexing classical and quantum signals comprises a transmitter and receiver unit connected by optical fibre. The transmitter unit comprises: a device for generating quantum signals; dense wavelength division multiplexer (DWDM); a unit for filtering the noise of quantum signals; a wavelength division multiplexer (WDM). The receiver unit comprises: WDM demultiplexer; a unit for filtering the noise of quantum signals; DWDM demultiplexer; a device for receiving quantum signals.
EFFECT: providing a universal principle for the transmission of quantum signals together with classical signals without limiting their power.
5 cl, 3 dwg
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