Developments of free-space quantum key distribution;

Study on quantum key bit rate in free-space quantum cryptography;

Developments of free-space quantum cryptography;

Key techniques of free space laser communication;

The design of optical free space communication system with the optical fiber coupling system;

Spectral and temporal properties of spatially and spectrally partially coherent Gaussian Schell-model pulsed beams in free space;

The two pattems are very similar in the following four aspects: assumption, freedom of space, hint of space, open of space.

Novel model for the spatial degrees of freedom of MIMO wireless systems;