基于自发参量下转换的宽光谱分布实验研究  

Research on Broadband Spectrum Distribution Based on Spontaneous Parametric Down Conversion

作　　者：高冬阳 夏茂鹏[2] 胡友勃 刘岩[2] 盛文阳 李健军[2] 郑小兵[2] 

机构地区：[1]安徽大学物理与材料科学学院,安徽合肥230031 [2]中国科学院安徽光学精密机械研究所,通用光学定标与表征技术重点实验室,安徽合肥230031

出　　处：《激光与光电子学进展》2015年第5期185-190,共6页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61275173);国防技术基础项目(J2920130004)

摘　　要：研究相关光子光场的光谱分布对基于自发参量下转换的光电探测器的宽波段辐射定标具有重要意义。建立了相关光子宽光谱分布测量实验系统。利用355 nm连续波（CW）激光抽运BBO晶体产生I类非共线自发参量下转换,使用光子计数系统测量了相关光子在晶体后端的光谱分布,测量的相关光子光谱分布带宽为259 nm（550～808 nm）。相关光子的光谱角分布测量结果与理论模拟结果近似,相对误差小于2%。实验结果表明相关光子存在着可见-近红外宽波段光谱分布,有望应用于光电探测器的宽光谱定标。Research on spectrum distribution of correlated photon optics-field has great significance in terms of the calibration for photoelectric detector in broadband spectrum based on spontaneous parametric down-conversion.An experiment is set up to measure the distribution of correlated photon broadband spectrum. A continuous wave355 nm laser and a photon counting system are used to pump the β-barium borate（BBO） crystal to product type I spontaneous parametric down-conversion in the regime of nonlinear and the spectrum distribution of correlated photon outside the BBO crystal is measured, respectively. The bandwidth of correlated photon spectrum in experiment is 259 nm（550～808 nm）. The angle distribution result in experiment is in accordance with the theory prediction, with the angle distribution difference less than 2%. It is turned out that a broad band spectrum distribution from visible to near infrared exists with respect to correlated photon. It is promising to be applied to calibration for photoelectric detector in broadband spectrum.

关 键 词：非线性光学 自发参量下转换 光子计数 宽光谱分布 

分 类 号：O437[机械工程—光学工程]