作者: Massimo Ghioni , Andrea Giudice , Sergio Cova , Franco Zappa
DOI: 10.1080/09500340308234577
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摘要: Abstract Experimental results obtained with silicon single photon avalanche diodes (SPADs) in quantum key distribution (QKD) at short wavelengths reveal remarkable potential for application local area networks (LAN) and free-space transmission high rate. Actual prospects, however, depend on the performance level suitability of practical systems using available SPAD devices. They can be essentially divided two groups: planar p-n junction structures a thin depletion layer (typically 1 μm); reach-through thick (from 20 μm to 150μm). The physical mechanisms that control device behaviour were investigated effect parameters detector (quantum detection efficiency, dark counting rate, afterpulsing probability photon-timing jitter) thoroughly assessed. A quantitative analysis was made influence such bit error rate (QBER). measur...