A Compact PCI-based Measurement and Control System for Satellite-Ground   Quantum Communication
  Since the 1990s, there has been a dramatic interest in quantum communication. Free-space quantum communication is being developed to ultra-long distance quantum experiment, which requires higher electronics performance, such as time measurement precision, data-transfer rate, and system integration density. As part of the ground station of quantum experiment satellite that will be launched in 2016, we specifically designed a compact PCI-based multi-channel electronics system with high time-resolution, high data-transfer-rate. The electronics performance of this system was tested. The time bin size is 23.9ps and the time precision root-mean-square (RMS) is less than 24ps for 16 channels. The dead time is 30ns. The data transfer rate to local computer is up to 35 MBps, and the count rate is up to 30M/s. The system has been proven to perform well and operate stably through a test of free space quantum key distribution (QKD) experiment. 
Binxiang Qi, Shubin Liu, Qi Shen, Shengkai Liao, Zehong Lin, Wenqi   Cai, Weiyue Liu, Chengzhi Peng, and Qi An
quant-ph physics.ins-det