自发参量下转换双光子场的产生及其在光学计量中的应用  

ABSOLUTE CALIBRATION OF PHOTODETECTORS BASED ON SPONTANEOUS PARAMETRIC DOWN CONVERSION BIPHOTON FIELD

作　　者：孙立群[1] 张元馨[1] 刘亚芳[1] 徐明顺[2] 

机构地区：[1]西安交通大学,陕西西安710049 [2]西安应用光学研究所,陕西西安710065

出　　处：《应用光学》1999年第5期31-36,共6页Journal of Applied Optics

基　　金：兵器科技预研基金

摘　　要：讨论自发参量下转换双光子场的产生机理，提出一种基于自发参量下转换双光子场绝对测量光电探测器量子效率的新方法。基于这一方法对光子计数型光电倍增管的量子效率进行测量，并将实验结果与常规方法测得的结果进行比较。A new method of absolute calibration of photodetector′s sensitivity based on spontaneous parametric down conversion (SPDC) biphoton field is discussed.The process of SPDC is studied theoretically.An experimental system has been set up. The sensitivity of a photon counting photomultiplier tube was measured, and the results were compared with that obtained using conventional method.

关 键 词：光学计量 自发参量下转换 光子计数 量子效率 

分 类 号：O431[机械工程—光学工程] TB96[理学—光学]