SI Traceable Solar Spectral Irradiance Measurement Based on a Quantum Benchmark: A Prototype Design

Remote Sensing

Weiwei Pang¹  Jianjun Li¹  Xiaobing Zheng¹  Maopeng Xia¹  Youbo Hu¹  Yinlin Yuan¹  Wenchao Zhai¹ 

[1] Key Laboratory of Optical Calibration and Characterization, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, Anhui 230031, China;

关键词: radiometric benchmark;    spontaneous parametric down-conversion;    correlated photons;    detector calibration;    solar irradiance;   

DOI  :  10.3390/rs12091454

来源: DOAJ

【 摘 要 】

We propose a space benchmark sensor with onboard SI (Système International) traceability by means of quantum optical radiometry. Correlated photon pairs generated by spontaneous parametric down-conversion (SPDC) in nonlinear crystals are used to calibrate the absolute responsivity of a solar observing radiometer. The calibration is systematic, insensitive to degradation and independent of external radiometric standards. Solar spectral irradiance at 380–2500 nm is traceable to the photon rate and Planck’s constant with an expected uncertainty of about 0.35%. The principle of SPDC calibration and a prototype design of the solar radiometer are introduced. The uncertainty budget is analyzed in consideration of errors arising from calibration and observation modes.

【 授权许可】

Unknown