Femtosecond laser ablation of crystals SiO2 and YAG

Authors :: Xu, Shizhen
Qiu, Jianrong
Jia, Tianqing
Li, Chengbin
Sun, Haiyi
Xu, Zhizhan
Source :: Optics Communications. Jun2007, Vol. 274 Issue 1, p163-166. 4p.
Publication Year :: 2007
Abstract: Abstract: Damage threshold of crystals SiO2 and YAG against 60–900fs, 800nm laser pulses are reported. The breakdown mechanisms were discussed based on the double-flux model and Keldysh theory. We found that impact ionization plays the important role in the femtosecond laser-induced damage in crystalline SiO2, while the roles of photoionization and impact ionization in YAG crystals depend on the laser pulse durations. [Copyright &y& Elsevier]