Acta Photonica Sinica, Volume. 49, Issue 6, 0630001(2020)
Experimental Study of Radiometer Based on Spontaneous Parametric Down-conversion Calibration
Figures & Tables(11)
Fig. 1. Diagram of the direction of photon emission generated by SPDC
Fig. 2. The relationship between wavelength and divergence angle of SPDC
Fig. 3. Principle of absolute quantum efficiency calibration for detectors with loss or decay
Fig. 5. Schematic diagram of spontaneous parametric down conversion spectrum measurement
Table 1. Theoretical value and measured value of divergence angle
View tableView in ArticleTable 1. Theoretical value and measured value of divergence angle
Wavelength Divergence angle Theoretical value 466nm 5.30 5.6 550nm 4.14 4.2 580nm 3.48 3.6 605nm 2.98 2.8 685nm 1.00 0.6 737nm 1.23 0.4 850nm 3.60 3.1 910nm 5.30 5.1 1000nm 7.50 7.2
Table 2. Radiance of halogen-tungsten lamp measured by radiometer under different optical decay conditions
View tableView in ArticleTable 2. Radiance of halogen-tungsten lamp measured by radiometer under different optical decay conditions
Number Photon counting rate in the observation mode/s Channel detection efficiency The radiance of output port/(W·sr－1·mm－2) 1 2 368 321 0.086 5 9.27×10－9 2 1 846 324 0.067 7 9.22×10－9 3 1 456 875 0.053 4 9.18×10－9 4 1 267 316 0.046 3 9.22×10－9 5 954 342 0.034 7 9.19×10－9 Relatively standard uncertainty 0.38%
Table 3. Radiance of halogen-tungsten lamp measured by radiometer under different electronics decay conditions
View tableView in ArticleTable 3. Radiance of halogen-tungsten lamp measured by radiometer under different electronics decay conditions
Number Photon counting rate in the observation mode/s Channel detection efficiency The radiance of output port/(W·sr－1·mm－2) 1 2 717 655 0.029 485 1.202×10－8 2 2 696 484 0.029 217 1.203×10－8 3 469 531 0.004 681 1.208×10－8 Relatively standard uncertainty 0.28%
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You-bo HU, Dong-yang GAO, Jian-jun LI, Xiao-bing ZHENG. Experimental Study of Radiometer Based on Spontaneous Parametric Down-conversion Calibration[J]. Acta Photonica Sinica, 2020, 49(6): 0630001
Paper Information
Category: Spectroscopy
Received: Dec. 19, 2019
Accepted: Mar. 12, 2020
Published Online: Nov. 26, 2020
The Author Email: ZHENG Xiao-bing (xbzheng@aiofm.ac.cn)
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