Wang Jin-Dong, Lu Wei, Zhao Feng, Liu Xiao-Bao, Guo Bang-Hong, Zhang Jing, Huang Yu-Xian, Lu Yi-Qun, Liu Song-Hao. The experimental research on a stable free-space quantum key distribution system with low noiseJ. Acta Physica Sinica, 2008, 57(7): 4214-4218. DOI: 10.7498/aps.57.4214