Journal of Applied Optics, Volume. 45, Issue 3, 537(2024)
Measurement method of beam quality factor β for high energy laser
Figures & Tables(9)
Fig. 1. Schematic diagram of orthogonal slit scanning in rotary roller-type
Fig. 2. Schematic diagram of measuring device of high energy laser beam quality factor β
Fig. 3. Physical picture of measuring device of developed high energy laser beam quality factor β
Table 1. Spot diameter and its number of pixels corresponding to horizontal direction of camera
View tableView in ArticleTable 1. Spot diameter and its number of pixels corresponding to horizontal direction of camera
衍射极限倍数 激光波长1.3 μm 光斑直径/μm 相机上像素数 1 50.75 3 2 101.50 7 3 152.26 10 4 203.01 13 5 253.76 17 6 304.51 20 7 355.26 24 8 406.02 27 9 456.77 30 10 507.52 34
Table 2. Spot diameter by microscopic amplification method and its number of pixels corresponding to horizontal direction of camera
View tableView in ArticleTable 2. Spot diameter by microscopic amplification method and its number of pixels corresponding to horizontal direction of camera
衍射极限 倍数 原始光斑 直径/μm 放大4× 放大20× 光斑 直径/μm 相机上 像素数 光斑 直径/μm 相机上 像素数 1 50.75 203.01 13 1 015.04 68 2 101.50 406.02 27 2 030.08 135 3 152.26 609.02 41 3 045.12 203 4 203.01 812.03 54 4 060.16 270 5 253.76 1 015.04 68 5 075.20 338 6 304.51 1 218.05 81 6 090.24 406 7 355.26 1 421.06 95 7 105.28 474 8 406.02 1 624.06 108 8 120.32 541 9 456.77 1 827.07 122 9 135.36 609 10 507.52 2 030.08 135 10 150.40 677
Table 3. Relationship between minimum spatial resolution and roller rotation frequency as well as digital sampling clock
View tableView in ArticleTable 3. Relationship between minimum spatial resolution and roller rotation frequency as well as digital sampling clock
滚轮转频/Hz 1.25 2.5 5 10 20 最小空间分辨率/μm 0.085 0.170 0.340 0.680 1.360
Table 4. Verification results of beam quality factor β
View tableView in ArticleTable 4. Verification results of beam quality factor β
光束质量标准值βs 光束质量测量值βt 相对误差 1.79 1.65 8% 3.56 3.25 4% 5.27 5.14 3% 7.93 7.86 1%
Table 5. Measuring device uncertainty assessment results of beam quality factor β
View tableView in ArticleTable 5. Measuring device uncertainty assessment results of beam quality factor β
不确定度分量 相对不确定度/% 评定方法 光斑直径计算引入的不确定度 2 B类 光学衰减系统引入的不确定度 2 B类 系统等效焦距引入的不确定度 0.5 B类 出光孔径测量引入的不确定度 0.7 B类 激光波长引入的不确定度 0.5 B类 测量重复性引入的不确定度 1.0 A类 合成标准不确定度/% 3.2 扩展不确定度/%（k=2） 7
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Wanhong YIN, Zaitian DONG, Yunlong ZHANG, Wentao WANG, Lei LIU, Haoyuan CHEN, Yuanyuan DUAN, Lei WU, Gaoping LI, Dongyu YU, Pei WU, Bing YU, Pengcheng SUN. Measurement method of beam quality factor β for high energy laser[J]. Journal of Applied Optics, 2024, 45(3): 537
Paper Information
Category: Research Articles
Received: Dec. 26, 2022
Accepted: --
Published Online: Jun. 2, 2024
The Author Email: YIN Wanhong (515070709@qq.com)
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