• Chinese Optics Letters
  • Vol. 17, Issue 9, 091201 (2019)
Haiyong Gan*, Yingwei He, Xiangliang Liu, Nan Xu, Houping Wu, Guojin Feng, Wende Liu, and Yandong Lin
Author Affiliations
  • Division of Optics, National Institute of Metrology, Beijing 100029, China
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    DOI: 10.3788/COL201917.091201 Cite this Article Set citation alerts
    Haiyong Gan, Yingwei He, Xiangliang Liu, Nan Xu, Houping Wu, Guojin Feng, Wende Liu, Yandong Lin. Absolute cryogenic radiometer for high accuracy optical radiant power measurement in a wide spectral range[J]. Chinese Optics Letters, 2019, 17(9): 091201 Copy Citation Text show less
    Optical radiant power measurement and photodetector spectral responsivity calibration scheme.
    Fig. 1. Optical radiant power measurement and photodetector spectral responsivity calibration scheme.
    ACR facility at the National Institute of Metrology, China.
    Fig. 2. ACR facility at the National Institute of Metrology, China.
    Picture of the ACR cavity receiver.
    Fig. 3. Picture of the ACR cavity receiver.
    Spectral diffuse reflectance measurement results of the specular black material on a flat surface. Inset: the cavity receiver with the inner surface coated with the specular black material.
    Fig. 4. Spectral diffuse reflectance measurement results of the specular black material on a flat surface. Inset: the cavity receiver with the inner surface coated with the specular black material.
    Cavity receiver thermistor resistance records during the optical radiant power measurements without reaching full thermal equilibrium.
    Fig. 5. Cavity receiver thermistor resistance records during the optical radiant power measurements without reaching full thermal equilibrium.
    Thermistor resistance reading changing rate during the optical radiant power measurements without reaching complete thermal equilibrium.
    Fig. 6. Thermistor resistance reading changing rate during the optical radiant power measurements without reaching complete thermal equilibrium.
    Derivation of thermistor resistance at complete thermal equilibrium based on the optical radiant power measurement results without reaching complete thermal equilibrium.
    Fig. 7. Derivation of thermistor resistance at complete thermal equilibrium based on the optical radiant power measurement results without reaching complete thermal equilibrium.
    SourceTypeValue (%)
    Effective electric heating powerB0.021
    Cavity thermal non-equivalenceB0.005
    Cavity absorptivity (250 nm–16 μm)B0.01
    Laser power stabilityB0.005
    NonlinearityB(–)
    RepeatabilityA0.033
    Combined uncertainty (k=1)0.041
    Table 1. Uncertainty Analysis for Optical Radiant Power Measurements at ∼100 μW (250 nm–16 μm)
    SourceTypeValue (%)
    Effective electric heating powerB0.007
    Cavity thermal non-equivalenceB0.005
    Cavity absorptivity (500 nm–16 μm)B0.005
    Laser power stabilityB0.005
    NonlinearityB(–)
    RepeatabilityA0.01
    Combined uncertainty (k=1)0.015
    Table 2. Uncertainty Analysis for Optical Radiant Power Measurements at ∼1 mW (500 nm–16 μm)
    Haiyong Gan, Yingwei He, Xiangliang Liu, Nan Xu, Houping Wu, Guojin Feng, Wende Liu, Yandong Lin. Absolute cryogenic radiometer for high accuracy optical radiant power measurement in a wide spectral range[J]. Chinese Optics Letters, 2019, 17(9): 091201
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