基于相关光子的光辐射定标方法研究  

Optical Radiometric Calibration Based on Correlated Photons

作　　者：冯瑜[1] 郑小兵[1] 张伟[1] 李健军[1] 乔延利[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所遥感室,合肥230031

出　　处：《光学学报》2007年第3期457-460,共4页Acta Optica Sinica

基　　金：国家自然科学基金(60378027)资助课题。

摘　　要：为提高定标精度,提出一种基于相关光子的光辐射定标方法,它是一种独立于基于辐射源和基于探测器的定标方法。利用351．1 nm的激光抽运BBO晶体产生的相关光子,建立了一套基于相关光子的光辐射定标系统,分析了它的原理和实验装置,给出符合测量系统,并对结果进行了讨论。结果表明,该系统定标的光电倍增管(R2949)在702．2 nm的量子效率为(5．960±0．003)%,与其在这一波长的量子效率典型值的相对误差约为1．0%,测量结果的相对合成标准不确定度为2．61%。A method of optical radiometric calibration based on correlated photons was proposed to improve calibration precision. It was independent of the methods based on radiometric source or detectors. With 351 nm laser to pump β-Barium Borate（BBO）crystal, a radiometric calibration system based on correlated photons had been set up, and its principle and experimental setup were analyzed. Coincident metrical system was given, and the experimental result is discussed. The results showed that the calibrated quantum efficiency of photomultiplier （R2949） at 702 nm was （5.96±0. 003） % , the relative error of experimental result was about 1.0% with respect to the typical quantum efficiency of photomultiplier （R2949）at this wavelength, and relative combined uncertainty of the results was about 2.61%.

关 键 词：遥感 辐射定标 相关光子 量子效率 参变下转换 

分 类 号：TN249[电子电信—物理电子学]