Integrated four-channel all-fiber up-conversion single-photon-detector with adjustable efficiency and dark count
Ming-Yang Zheng, Guo-Liang Shentu, Fei Ma, Fei Zhou, Hai-Ting Zhang,, Yun-Qi Dai, Xiuping Xie, Qiang Zhang, Jian-Wei Pan
TL;DR
This paper presents an integrated four-channel all-fiber up-conversion single-photon detector capable of adjustable efficiency and dark count, suitable for various quantum and optical applications, with comprehensive system characterization.
Contribution
It introduces the first laboratory-developed integrated four-channel all-fiber UCSPD with adjustable parameters and dual operation modes.
Findings
System operates in free-running and gate modes
Detection efficiency and dark count are adjustable
Key parameters of the system are thoroughly characterized
Abstract
Up-conversion single photon detector (UCSPD) has been widely used in many research fields including quantum key distribution (QKD), lidar, optical time domain reflectrometry (OTDR) and deep space communication. For the first time in laboratory, we have developed an integrated four-channel all-fiber UCSPD which can work in both free-running and gate modes. This compact module can satisfy different experimental demands with adjustable detection efficiency and dark count. We have characterized the key parameters of the UCSPD system.
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