量子纠缠实验中 SPDC光谱分布的计算分析与实验研究

摘要

The property of the spontaneous parametric downward conversion (SPDC) light spec-trum distribution was analyzed theoretically ,and the field distribution of the type Ⅱ SPDC light gen-erated in BBO crystal pumped by a 403 nm continuous laser was given by numerical simulation .A photon (of the wavelength of 806 nm ,created by SPDC) distribution measurement apparatus was also designed .The experimental results were in accordance to the simulation .%理论分析了量子纠缠教学实验中用于纠缠光子对产生的Ⅱ类自发参量下转换（SPDC ）光场的光谱分布特征，通过数值模拟给出403 nm连续激光光源通过BBO晶体产生的Ⅱ类SPDC光场信号光分布曲线。据此设计了SPDC过程产生的806 nm光子分布测量实验，实验结果与模拟结果一致。