Theoretical and experimental study on femtosecond laser induced damage in CaF2 crystals
Theoretical and experimental study on femtosecond laser induced damage in CaF2 crystals
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飞秒激光损伤CaF2晶体的理论与实验研究
DOI：
10.1007/s00339-004-2685-z
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
Z. Z. Xu
中科院分区：
文献类型：
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作者：
T. Jia;T. Jia;Xuelai Li;Dengguo Feng;Chuantong Cheng;R. Li;Hong Chen;Z. Z. Xu
报道了800 nm和400 nm飞秒激光对CaF2晶体的损伤阈值。文中还给出了烧蚀深度和烧蚀体积与激光注量的关系。从理论上研究了声子与导带电子之间的耦合常数，并计算了导带电子对激光能量的吸收速率。建立了CBE产生、激光能量沉积和CBE扩散的理论模型，研究了CBE的损伤机制。结果表明，能量扩散对损伤阈值和烧蚀深度有很大影响。
We report on the damage threshold in CaF2crystals induced by femtosecond laser at wavelengths of 800 nm and 400 nm, respectively. The dependences of ablation depths and ablation volumes on laser fluences are also presented. We investigate theoretically the coupling constants between phonon and conduction band electrons (CBE), and calculate the rates of CBE absorbing laser energy. A theoretical model including CBE production, laser energy deposition, and CBE diffusion is applied to study the damage mechanisms. Our results indicate that energy diffusion greatly influences damage threshold and ablation depth.
T.Tsujibayashi：“同步辐射和激光激发的碱土氟化物中的激子对双光子吸收的共振增强效应”Phys.Rev.. B60。
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