摘要
根据热传导方程,对侧面泵浦复合薄片新结构的热效应进行了分析,求解出侧面泵浦薄片晶体内的温度、应力以及等效热焦距,模拟分析了晶体厚度,边界条件等对晶体热效应的影响。对比分析了同等条件下非复合晶体和复合晶体的温度、应力及热焦距。计算和数值模拟表明:同等条件下复合后晶体中心到边缘的温差、应力和非复合时相比减少了近25%,等效热焦距增大到非复合时的2倍左右,为进一步优化激光器设计,补偿热效应提供了依据,为提高激光输出的稳定性奠定了理论基础。
The thermal effects of LDA side-pumped composite crystal is studied with heat exchange equation. The temperature, thermal stress and thermal focus length are obtained. The thermal effects of the crystal are simulated with ciifferent thickness of the crystal and different cooling condition of the lasers. Temperature, thermal stress and thermal focus length are comparative analyzed under the same conditions between the composite crystal and the non-composite crystal. Calculation and simulation shows that the temperature and the thermal stress of the composite crystal decrease about 25 %, the thermal focus length is increased to two times compare to the non-composite crystal under the same conditions. The results are useful for optimizing design of laser to compensate the thermal lens effect and improve the stability of laser output.
出处
《应用激光》
CSCD
北大核心
2009年第4期329-336,共8页
Applied Laser
基金
国家自然科学基金资助项目(项目编号:60678014)
关键词
薄片激光器
热效应
热应力
热焦距
复合晶体
disk laser
thermal effect
thermal stress
thermal focus length
composite crystal
