Figure 2From: Proof-of-principle demonstration of semi-quantum key distribution based on the Mirror protocolThe scheme based on the Mirror protocol with time-phase encoding. LD: laser diode, ATT: attenuator, CIR: circulator, BS: beam splitter, PM: phase modulator, IM: intensity modulator, PBS: polarization beam splitter, QC: quantum channel, SPDs (SPD1 and SPD2): single photon detectorsBack to article page