22 October 2010 Research on high-speed single photon detector
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Single-photon detector based on an InGaAs avalanche photodiode is one of hot research on the quantum photon, and is one of the key technologies on quantum communication and quantum image. It is widely used in applications as high sensitive photon spectrum, high speed optic measurement and so on. A suitable delay and comparator with latch function circuit are used to prevent positive and negative transient pulses from influencing the detection of true photon induced avalanches. A dead time modulation feedback control circuit decreases the after-pulse. Especially, ECL difference circuit is the key of high speed single photon detector. In addition, the detector uses the hot tube fan-cooling method. From the performance test, the lowest temperature reaches -62°C, the minimum gate pulse width is 2ns (Full-Width-Half-Max, FWHM) and the dark counter rate is 2.5×10-6 ns-1 with a detection rate of 10MHz when the quantum efficiency is more than 10%.
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Chao Wang, Chao Wang, Hao Yang, Hao Yang, Di Wang, Di Wang, Haiqiang Ma, Haiqiang Ma, Kaihong Luo, Kaihong Luo, Zhibin Sun, Zhibin Sun, Guangjie Zhai, Guangjie Zhai, } "Research on high-speed single photon detector", Proc. SPIE 7658, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Detector, Imager, Display, and Energy Conversion Technology, 76580L (22 October 2010); doi: 10.1117/12.865462; https://doi.org/10.1117/12.865462

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