Chinese Optics Letters, 2008, 6 (5): 320, Published Online: May. 20, 2008
Quick single-photon detector with many avalanche photo diodes working on the time division Download: 570次
单光子探测器 雪崩二极管 量子通信 量子密钥分配 码率 时分模式 040.5160 Photodetectors 060.4510 Optical communications 230.5160 Photodetectors 270.5570 Quantum detectors
Abstract
Due to the limit of response speed of the present single-photon detector, the code rate is still too low to come into practical use for the present quantum key distribution (QKD) system. A new idea is put up to design a quick single-photon detector. This quick single-photon detector is composed of a multi-port optic-fiber splitter and many avalanche photo diodes (APDs). All of the ports with APDs work on the time division and cooperate with a logic discriminating and deciding unit driven by the clock signal. The operation frequency lies on the number N of ports, and can reach N times of the conventional single-photon detector. The single-photon prompt detection can come true for high repetition-rate pulses. The applying of this detector will largely raise the code rate of the QKD, and boost the commercial use.
Jian Peng, Yifei Fu, Li Yao, Xudong Shang, Zhixin Lu, Bojun Yang, Li Yu. Quick single-photon detector with many avalanche photo diodes working on the time division[J]. Chinese Optics Letters, 2008, 6(5): 320.