激光技术2012，Vol.36Issue(5)：612-616,5.DOI:10.3969/j.issn.1001-3806.2012.05.009
LD端面抽运变导热系数Nd:YAG晶体热效应
Thermal effect of LD end-pumped Nd:YAG crystal with variable thermal conductivity
摘要
Abstract
In order to calculate temperature field and thermal distortion field of laser diode end-pumped Nd:YAG crystal, the temperature thermal model of the crystal was built under the condition of thermal isolation of the end face and constant peripheral temperature. Based on the function of temperature of the Nd-YAG crystal depending upon the thermal conductivity and thermal distortion coefficient, after the thermal model of heat conduction equations were solved by means of the Newton tangent method, the general equations of the temperature field and thermal distortion field of the end-pumped rectangular cross section Nd-YAG crystal with variable thermal conductivity and thermal distortion coefficient were obtained. Then the internal temperature field distribution and thermal distortion field were calculated under different of pump power and pump spot size. Results show that under the condition of 0. 01 Nd ion mass fraction, 60W pump power and 450μm pump spot radius, the maximum temperature rise on the end face of the Nd:YAG crystal in 3mm × 3mm x 8mm was 55. 7℃ , and the maximum thermal distortion was 2. 85μm. However, traditionally the thermal conductivity and thermal distortion coefficient were taken as constant, the maximum temperature rise on the end face of the Nd-YAG crystal was 43. 4℃ and the maximum thermal distortion was 2. 84μm.关键词
激光器/热效应/固体激光器/Nd:YAG晶体/导热系数Key words
lasers/ thermal effect/ solid-state laser/ Nd-YAG crystal/ thermal conductivity分类
信息技术与安全科学引用本文复制引用
李隆,甘安生,齐兵,支音,王良甚,史彭..LD端面抽运变导热系数Nd:YAG晶体热效应[J].激光技术,2012,36(5):612-616,5.基金项目
西安市科技局创新支撑计划资助项目(CXY1015(6)) （CXY1015(6）
陕西省教育厅专项科研计划资助项目(11JK0532) （11JK0532）
