Traceability of High‑Power Laser Power Value Based on Calorimetry

Dongyu Yu; Xinyi Yang; Dong Li; Bing Yu; Yunlong Zhang; Yue You; Pei Wu; Hong Gao; Wenge Guo; Xiaofei Hu

doi:10.3788/CJL250478

Chinese Journal of Lasers, Volume. 52, Issue 11, 1104005(2025)

Traceability of High‑Power Laser Power Value Based on Calorimetry

Dongyu Yu^1,4、*, Xinyi Yang², Dong Li³, Bing Yu¹, Yunlong Zhang¹, Yue You¹, Pei Wu¹, Hong Gao⁴, Wenge Guo⁵, and Xiaofei Hu⁶

Author Affiliations

¹Optical Primary Measuring Station of National Defense Science and Technology Industry, Xi’an Institute of Applied Optics, Xi’an 710065, Shaanxi , China

²Xi’an North Electro-Optic Science & Technology Defense Co., Ltd., Xi’an 710043, Shaanxi , China

³Xi’an Military Representative Office, Land Aviation Bureau, Xi’an 710065, Shaanxi , China

⁴School of Physics, Xi’an Jiaotong University, Xi’an 710049, Shaanxi , China

⁵Faculty of Science, Xi’an Shiyou University, Xi’an 710065, Shaanxi , China

⁶Xi’an Yufei Electronic Technology Co., Ltd., Xi’an 710065, Shaanxi , China

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Figures & Tables(12)

Fig. 1. Profile of power measurement device for high power laser

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Fig. 2. Temperature distributions of absorption cavity at fixed flow rate of 0.33 L/s under different laser powers. (a) 1 kW laser power; (b) 40 kW laser power

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Fig. 3. Improvement effect of temperature stability. (a) Before treatment; (b) after treatment

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Fig. 4. Measurement results under different powers

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Fig. 5. Linear fitting result of laser power

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Fig. 6. Laser power and temperature rise curves at flow rate of 0.230 L/s. (a) Laser power; (b) temperature rise

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Fig. 7. Laser power and temperature rise curves at flow rate of 0.029 L/s. (a) Laser power; (b) temperature rise

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Fig. 8. Test results for response uniformity of absorption cavity surface

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Fig. 9. Principle of uncertainty verification

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Table 1. Laser power repeatability test results
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Table 1. Laser power repeatability test results
Serial No. Laser power /W Serial No. Laser power /W
1 2585 7 2580
2 2585 8 2588
3 2574 9 2582
4 2580 10 2589
5 2586 11 2590
6 2580

Table 2. Measurement uncertainties

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Table 2. Measurement uncertainties

Uncertainty	Value /%
Uncertainty of water flow	0.055
Uncertainty of temperature difference	0.43
Uncertainty of absorption cavity coefficient	0.55
Uncertainty of repeatability	0.06
Uncertainty of linear introduction	0.51
Uncertainty of surface response uniformity	1.0
Uncertainty of temperature rise	0.15
Synthetic standard uncertainty of laser power	1.4

Table 3. Comparison of measurement results between optical pressure power meter and high-power laser measurement device
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Table 3. Comparison of measurement results between optical pressure power meter and high-power laser measurement device
Measured result by optical pressure power meter /W Measured result by high-power laser measurement device /W $E_{n}$
1160 1154 0.15
3080 3056 0.23
6500 6522 0.10
9480 9478 0.01
21332 21256 0.10
38695 38583 0.08

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Dongyu Yu, Xinyi Yang, Dong Li, Bing Yu, Yunlong Zhang, Yue You, Pei Wu, Hong Gao, Wenge Guo, Xiaofei Hu. Traceability of High‑Power Laser Power Value Based on Calorimetry[J]. Chinese Journal of Lasers, 2025, 52(11): 1104005

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