光学材料的激光损伤形态研究

Study on laser induced damage morphology in optical materials

提出了破坏形态因子的概念并以高功率连续激光作用下的光学材料的热力学响应为例 ,通过积分变换的方法给出激光作用期间温度场和应力场的解析形式 ,继而得到破坏形态因子的表达式及其简化形式 ,研究破坏形态因子与材料性质、激光参数的关系 。

The concept of damage morphology criterion is eatablished to study how the different failure modes of optical materials irradiated by CW laser appear under different interaction conditions. The analytic solutions of temperature and stress profiles generated during laser heating are obtained by the way of Hankel transform, then damage thresholds for elastic failure and melting are determined respectively. The dependence of damage form on material properties and laser parameters is evaluated and the simplified relationship is presented to predict the damage form of optical materials irradiated by CW laser. At last, experiment results are presented to prove the validity of the damage morphology criterion.