However,satellite-to-ground quantum key distribution(QKD) systems by using of commercial single photon counting module(SPCM) are facing a challenge of spatial-light-to-multimode-fiber coupling on the receiver end.

Study on key transmission rate and BER of fiber-based quantum key distribution system;

Stable quantum key distribution with polarization control;

Scheme design and improvement of quantum key distribution network;

Influence of path-attack on security of quantum key distribution networks;