title: Integrated four-channel all-fiber up-conversion single-photon-detector with adjustable efficiency and dark count.
abstract: Up-conversion single photon detector (UCSPD) has been widely used in many research fields including quantum key distribution, lidar, optical time domain reflectrometry, 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.
authors: Shandong Institute of Quantum Science and Technology Co., Ltd., Jinan, Shandong 250101, China.
authors: Ming-Yang
authors: MY
authors: Zheng
authors: Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors: Guo-Liang
authors: GL
authors: Shentu
authors: Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors: Fei
authors: F
authors: Ma
authors: Jinan Institute of Quantum Technology, Jinan, Shandong 250101, China.
authors: Fei
authors: F
authors: Zhou
authors: QuantumCTek Co., Ltd., Hefei, Anhui 230088, China.
authors: Hai-Ting
authors: HT
authors: Zhang
authors: QuantumCTek Co., Ltd., Hefei, Anhui 230088, China.
authors: Yun-Qi
authors: YQ
authors: Dai
authors: Shandong Institute of Quantum Science and Technology Co., Ltd., Jinan, Shandong 250101, China.
authors: Xiuping
authors: X
authors: Xie
authors: Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors: Qiang
authors: Q
authors: Zhang
authors: Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors: Jian-Wei
authors: JW
authors: Pan