Quick single-photon detector with many avalanche photo diodes working on the time division

Peng, Jian; Fu, Yifei; Yao, Li; Shang, Xu-dong; Zhi-Xin, Lu; Yang, Bojun; Yu, Li

doi:10.3788/col20080605.0320

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2017

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“…Quick single-photon detector with multi-port splitter and many APDs work on time division 图多端口分束器与多 APD 结合构成的各端口时分工作模式的快速单光子探测器[29] 链路相连接。每一端口配置一反向偏置的雪崩二极管(APD)。各端口的 APD 均采用门控"盖革"…”

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Quantum Channel Physical Security Detection Based on Photon Number Measurement

彭建¹

2017

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The ideal single photon source and high performance single photon detectors are two key factors that restrict the key security and bit rate in quantum key distribution system. As a single photon source, the weak coherent pulse must contain fewer average photon number for the sake of security, thus the quantum bit rate cannot be raised to a high level. Superconducting transition edge sensor for single photon detection has been introduced. It is proposed that multi-port beam splitter combined with many APDs can be used to detect the photon number in weak coherent pulse in quantum key distribution system. The attack tactics of eavesdropper is analyzed, and based on photon number detection, it is proposed that the average photon number in weak coherent pulse can be improved, thus the quantum key bit rate can be improved.

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