超短光脉冲波形对门模单光子探测的影响  

Influence of Ultra-short Laser Pulse Shapes on Gate-mode Single Photon Detection

作　　者：方俊彬[1] 廖常俊[1] 魏正军[1] 刘小宝[1] 王金东[1] 刘颂豪[1] 

机构地区：[1]华南师范大学信息光电子科技学院光子信息技术广东省高校重点实验室,广州510631

出　　处：《光子学报》2009年第9期2192-2195,共4页Acta Photonica Sinica

基　　金：国家重点基础研究发展计划(G2001039302);教育部博士学科点专项科研基金(20050574001);广东省科技计划(2007B010400009);广州市科技支撑计划(2008Z1-D501)资助

摘　　要：采用两种不同的皮秒光脉冲波形进行了门模单光子探测实验.测量了单光子探测效率随探测器和超短脉冲光源之间的同步延迟细微调节时的变化曲线.结果表明:光脉冲波形直接影响光子到达时间与门脉冲时间窗口之间的精确同步和探测效率,使用其中一种脉宽较短的皮秒光脉冲时探测效率比使用另一种脉冲提高了约9%.Experiments of gated-mode single photon detection are performed using two picosecond laser pulses with different pulse shapes. The variation of single photon detection efficiency versus synchronous delay between detector and ultra-short pulse laser source is measured. The experimental results show that laser pulse shapes directly influence the precise synchronization between the arrival time of photon and the time window of gating pulse and so the detection efficiency. The detection efficiency can be improved about 9% using the shorter one of picosecond laser pulses compared with the other one.

关 键 词：单光子探测 超短光脉冲 门模式 探测效率 

分 类 号：TN247[电子电信—物理电子学] O439[机械工程—光学工程]