The study of single photon detector for quantum key distribution

• DOI: 10.1117/12.756615
• Publication Date: 2007-10-26T11:43:34Z
• Authors: Zhengjun Wei; Jindong Wang; Kaizhen Li; Peng Zhou; Changjun Liao; Jianping Guo; Songhao Liu
• Keywords: Quantum key distribution; Geiger counter; Photon Counting

This paper introduces the design of a single photon detector based on AT89C51 chip microcontroller for quantum key distribution at telecommunication wavelengths. An avalanche photodiode (APD) is operated in Geiger mode and stabilized temperature 228K translating signals into electrical pulses. The induced pulses are amplified converted to digital data. discriminates data, counting number photons, then displays detection efficiency LCD display. instrument can effectively support study distribution.