Controlling a sine wave gating single-photon detector by exploiting its filtering loophole

Feng Lin-Xi^{1, 2, †}, Jiang Mu-Sheng^{1, 2, †}, Bao Wan-Su^{1, 2, ‡}, Li Hong-Wei^{1, 2}, Zhou Chun^{1, 2}, Wang Yang^{1, 2}

(color online) The experimental principle diagram of controlling the SG-SPDs. LD: laser diode; M: Alice’s modulation process; Att: variable attenuator; QC: the quantum channel; DM: Bob’s demodulation process; PD: the photoelectric conversion; BS: the beam splitter. The laser source of control pulse and blinding pulse is EIG1000D and WT-LD100 respectively.