Measurement-device-independent quantum key distribution (MDI-QKD) is immuneto all security loopholes on detection. Previous experiments on MDI-QKDrequired spatially separated signal lasers and complicated stabilizationsystems. In this paper, we perform a proof-of-principle experimentaldemonstration of plug-and-play MDI-QKD over an asymmetric channel setting witha single signal laser, in which the whole system is automatically stabilized inspectrum, polarization, arrival time and phase reference. Both the signal laserand the single-photon detectors are in the possession of a common server. Apassive timing calibration technique is applied to ensure the precise andstable overlap of signal pulses. The results pave the way for the realizationof a quantum network, in which the users only need the encoding devices.
展开▼
