Comparison of femtosecond laser ablation of aluminum in water and in air by time-resolved optical diagnosis

作者：Haofeng Hu, Tiegen Liu, Hongchen Zhai · 发表于：Optics Express · 年份：2015 · DOI：10.1364/oe.23.000628 · 被引用次数：37 · 研究领域：Laser-Ablation Synthesis of Nanoparticles、Laser-induced spectroscopy and plasma、Laser Material Processing Techniques

The dynamic process of material ejection and shock wave evolution during one single femtosecond laser pulse ablation of aluminum target in water and air is experimentally investigated by employing pump-probe technique. Shadowgraphs and digital holograms with high temporal resolution are recorded, which intuitively reveal the characteristics of femtosecond laser ablation in the water-confined environment. The experimental result indicates that the liquid significantly restrict the diffusion of the ejected material, and it has a considerable effect on the attenuation of the shock wave. In addition, the expansion Mach wave generated by the ultrasonic expansion of the shock wave is observed.