High-accuracy source-independent radiometric calibration with low complexity for infrared photonic sensors  

作　　者：Qiang Guo Fuchun Chen Xiangyang Li Boyang Chen Xin Wang Guilin Chen Caiying Wei 

机构地区：[1]National Satellite Meteorological Center,China Meteorological Administration,100081,Beijing,China [2]Key Laboratory of Infrared System Detection&Imaging Technology,Shanghai Institute of Technical Physics,Chinese Academy of Sciences,200083,Shanghai,China [3]Key Laboratory of Infrared Imaging Materials&Detectors,Shanghai Institute of Technical Physics,Chinese Academy of Sciences,200083,Shanghai,China

出　　处：《Light(Science & Applications)》2021年第9期1714-1725,共12页光（科学与应用)（英文版）

基　　金：This material is based upon work supported by National Natural Science Foundation of China(Grants#41875037 and#41275034).

摘　　要：Radiometric calibration(RC)is an essential solution to guarantee measurements from infrared photonic sensors with certain accuracy,the main task of which is to determine the radiometric responsivity of sensor and usually be solved by comparing with some radiation source(i.e.,blackbody),called source-based RC(SBRC).In addition to the complexity in manufacture,the nonideal characteristics of an available source will inevitably introduce unexpected uncertainties to reduce the final calibration accuracy by around 0.2–0.5 K in SBRC.Therefore,we propose an original source-independent RC(SIRC)principle based on modeling instead of comparing for SBRC,where the incident background radiation to detector,as a dominated factor influencing the responsivity characteristics of a photonic sensor,is modeled to implement RC for both two fundamental types(photoconductive and photovoltaic)of HgCdTe photonic detectors.The SIRC merely requires the temperature information of main components of a sensor other than some complex source and its assembly,and provides a traceable way at lower uncertainty costs relative to the traditional SBRC.The SIRC is being implemented in Fengyun-2 satellites since 2019,which ensures a long-term stable service of Chinese geostationary meteorological satellites for the global observation system under the framework of World Meteorological Organization.Moreover,a 20-year-period traceable Fengyun-2 dataset to be recalibrated with SIRC will benefit the further climate applications.

关 键 词：SOURCE COMPLEXITY calibration 

分 类 号：TN21[电子电信—物理电子学] TP212[自动化与计算机技术—检测技术与自动化装置]