激光照射有限尺寸高反射光学元件的温度场

xx_912

激光照射有限尺寸高反射光学元件的温度场王艳茹[1,2] 李斌成[1] 刘明强[1][1]中国科学院光电技术研究所,成都610209 [2]中国科学院研究生院,北京100039摘　要:采用格林函数法，考虑径向边界条件和对流热损失，理论上求解了有限尺寸高反射光学元件在激光作用下的热传导方程，获得了样品内的温度场分布。为验证所求解，模拟计算了不同光斑形状和光斑尺寸激光束照射下样品的温升曲线，并与有限元数值计算结果进行了比较，获得了较好的一致性，讨论了此精确物理模型中不同热交换系数对激光束照射下光学薄膜样品温升的影响。结果表明：热交换系数越大，样品内的温度分布越趋于平衡。[著者文摘]
8 J, X# ~4 A. B$ l/ H4 ~1 o$ m! _/ {' r
! H! p: z8 M+ M: b9 `  q+ s9 Z关键词:温度场 光学薄膜样品 热对流 有限元
" k# w& H9 M! k" s分类号:　O484.4[著者标引]文献标识码：A文章编号：1001-4322（2010）02-0335-06栏目信息：ICF与激光等离子体
相关文献:主题相关 全文快照　　　
$ Z" f1 s, S2 x5 Q
Laser-induced temperature distributions in finite radial-size optical mirrorWang Yanru , Li Bincheng , Liu Mingqiang 1. Institute of Optics and Electronics, Chinese Academy of Sciences, P. O. Box 350, Chengdu 610209, China 2. Graduate University of Chinese Academy of Sciences, Beijing 100039, ChinaAbstract:By solving a thermal conduction equation with Green＇s function method, a theoretical model is developed to describe the three-dimensional temperature distribution of a highly reflective optical coating sample with a finite radial size irradiated by a continuous-wave laser beam. The radial boundary conditions and heat losses from the sample to the environment are both considered in this model. To verify the theoretical model, temperature distributions are numerically calculated under different pump beam profiles and beam radii and the results are in good agreement with those of the finite-element method. Furthermore, the influence of different thermal loss coefficients on the temperature distributions of the sample irradiated by laser beams is discussed.[著者文摘]

5 Z* C. s  W) @Key words:temperature field; highly reflective optical coating sample; thermal convection; finite-element analysis