| 摘要 |
Systems and methods for multiplexing two or more channels of a quantum key distribution (QKD) system are disclosed. A method includes putting the optical public channel signal (SP 1 ) in return-to-zero (RZ) format in a transmitter (T) in one QKD station (Alice) and amplifying this signal (thereby forming SP 1* ) just prior to this signal being detected with a detector ( 30 ) in a receiver (R) at the other QKD station (Bob). The method further includes precisely gating the detector via a gating element ( 40 ) and a coincident signal (PN 1' ) with pulses that coincide with the expected arrival times of the pulses in the detected (electrical) public channel signal (SP 2 ). This allows for the public channel signal to have much less power, making it more amenable for multiplexing with the other QKD signals.
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