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Mechanisms of femtosecond laser-induced damage in magnesium fluoride |
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| Authors: | Haiyi Sun Tianqing Jia Chengbin Li Shizhen Xu Xiaofeng Wang Zhizhan Xu |
| Institution: | a State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China b The Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan |
| Abstract: | We studied the single-shot damage in magnesium fluoride irradiated by 800 nm femtosecond (fs) laser. The dependence of damage thresholds on the laser pulse durations from 60 to 750 fs was measured. The pump-probe measurements were carried out to investigate the time-resolved electronic excitation processes. A coupled dynamic model was applied to study the microprocesses in the interaction between fs laser and magnesium fluoride. The results indicate that both multiphoton ionization and avalanche ionization play important roles in the femtosecond laser-induced damage in MgF2. |
| Keywords: | 77 84 -s 72 20 Ht 78 47 +p 82 40 Js |
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