| 激光束光强分布对材料激光加热的影响 |
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| 引用本文： | 王伟平,吕百达,罗时荣. 激光束光强分布对材料激光加热的影响[J]. 强激光与粒子束, 2001, 13(3): 313-316 |
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| 作者姓名： | 王伟平 吕百达 罗时荣 |
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| 作者单位： | 四川大学激光物理与化学研究所;中国工程物理研究院流体物理研究所;四川大学激光物理与化学研究所 |
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| 基金项目： | 国家 8 6 3激光技术领域资助课题 !(86 3-4 10 -5 .6 ) |
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| 摘 要： | 对激光强度空间均匀分布光束、高斯、超高斯以及平顶高斯光束进行了分析比较,在激光功率与光斑半径相同条件下,计算了各种光束的峰值光强和光束填充因子与光束阶次的关系,给出了光强分布的表达式。并将不同空间分布的光束作为热源,耦合到材料热传导方程中,以数值计算说明了各种光束辐照下,2mm厚30CrMnSiA钢材料靶面不同的热效应。
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| 关 键 词： | 激光加热 温度分布 超高斯光束 平顶高斯光束 填充因子 |
| 文章编号： | 1001-4322(2001)03-0313-04 |
| 收稿时间： | 2000-12-12 |
| 修稿时间： | 2000-12-12 |
Influence of laser spacial profile on laser heating material |
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| WANG Wei ping ,,L Bai da ,LUO Shi rong. Influence of laser spacial profile on laser heating material[J]. High Power Laser and Particle Beams, 2001, 13(3): 313-316 |
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| Authors: | WANG Wei ping L Bai da LUO Shi rong |
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| Affiliation: | 1.Institute of Laser Physics and chemistry, sichuan University Chengdu, 610064;2.Institute of Fluid Physics, CAEP, P.O.BOX 919-113, Mianyang 621900, China |
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| Abstract: | Different laser intensity distributions such as the beam with uniform profile, Gaussian, super Gaussian and flattened Gaussian beams are analyzed and compared. Under the same power and radius, the expressions of intensity distributions and beam fill factor varing with beam orders for these beams are derived. In the heat conduction equation, laser beam with different spacial profiles as a surface heat source is included. Numerical calculations are performed to give the different thermal effects on a thin 30CrMnSiA metal slab induced by these beams. |
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| Keywords: | laser heating temperature field super Gaussian beam flattened Gaussian beam fill factor |
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