光学精密工程2011，Vol.19Issue(5)：1005-1012,8.DOI:10.3788/OPE.20111905.1005
相关光子符合计数的实现及修正
Realization and correction of coincidence counting setup used in correlated photon detection
摘要
Abstract
With the aim to realize Quantum Efficiency(QE) measurement of photon detectors based on Spontaneous Parametric Down-conversion(SPDC),two type of coincidence count systems were set up, the correction factors of coincidence count were analyzed and the real experimental methods of correction factors were given. Firstly, the principle of SPDC and the technique using SPDC to calibrate the QE of photo detectors were introduced. Then the design of two type of coincidence count systems, gated dual-photon counter coincidence count system and TAC/MCA coincidence count system, were introduced. Finally, the main correction factors, accidental coincidence, missing coincidence, dead time of counters and detectors were analyzed, and the calculation and test methods were also given. Experimental results show that the deviation between this two type of coincidence setups is less than 0.4％ after correction, which indicates that the two setups can satisfy the requirement of QE measurement.关键词
自发参量下转换/相关光子/量子效率/符合计数Key words
Spontaneous Parametric Down-conversion (SPDC) / correlated photon/ quantum-efficiency/ coincidence count分类
信息技术与安全科学引用本文复制引用
吕亮,林延东..相关光子符合计数的实现及修正[J].光学精密工程,2011,19(5):1005-1012,8.基金项目
国家科技部科技支撑项目(No.2006BAF06B05) （No.2006BAF06B05）
