Chinese Optics, Volume. 16, Issue 2, 382(2023)
Measurement repeatability of high power laser measuring device based on light pressure
Fig. 1. (a) Schematic diagram and (b) physical map of high power laser measurement system
Fig. 3. Experimental measurement results of laser power from 1000 W to 6000 W
Fig. 4. Measurement repeatability of laser power from 1000 W to 6000 W
Fig. 6. Distributions of light pressure measurement points under different powers
Fig. 7. Comparison of calculated synthetic repeatabilities and measured repeatability of laser power
Table 1. Comparison of repeatability between theoretical calculation and actual measurement
View tableView in ArticleTable 1. Comparison of repeatability between theoretical calculation and actual measurement
Laser Power /kW Equivalent mass /mg Calculated synthetic repeatability/% ( ${m_r}$ Calculated synthetic repeatability/% ( ${m_r}$ Measured laser power repeatability y/% 1.00 0.64 1.098 0.788 0.791 2.00 1.28 0.556 0.403 0.429 3.00 1.92 0.378 0.279 0.321 4.00 2.56 0.291 0.219 0.196 5.00 3.20 0.241 0.186 0.201 6.00 3.84 0.208 0.164 0.211
Table 2. Uncertainty budgets of light pressure measuring device
View tableView in ArticleTable 2. Uncertainty budgets of light pressure measuring device
Uncertainty component Type 1 kW (0.64 mg) 3 kW (1.92 mg) 6 kW (3.84 mg) Uncertainty of standard weights B 0.0016 0.0005 0.0003 Mirror reflectivity B 0.0003 0.0003 0.0003 Incidence angle B 0.0030 0.0030 0.0030 Repeatability A 0.0079 0.0032 0.0021 Resolution B 0.0045 0.0015 0.0008 Nonlinearity B 0.0010 0.0010 0.0010 Standard uncertainty (k=1) 0.976% 0.476% 0.390% Expanded uncertainty (k=2) 1.95% 0.96% 0.78%
Table 3. Comparison of measurement results between the light pressure method and the calorimetric method
View tableView in ArticleTable 3. Comparison of measurement results between the light pressure method and the calorimetric method
Measured power of calorimetric power meter/kW Measured mass/mg Measured power of light pressure power meter/kW Relative deviation/% 0.996 0.644 1.007 1.10 1.997 1.289 2.015 0.90 2.979 1.919 3.001 0.74 3.960 2.550 3.989 0.73 4.974 3.195 4.997 0.46 5.974 3.846 6.015 0.69
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Li-qiang ZHAO, Zhen-shan SUN, Dong-yu YU, Hong YANG, Yun-peng ZHANG, Qing SUN. Measurement repeatability of high power laser measuring device based on light pressure[J]. Chinese Optics, 2023, 16(2): 382
Category: Original Article
Received: May. 9, 2022
Accepted: Aug. 24, 2022
Published Online: Apr. 4, 2023
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