Abstract- Micro size craters were created by focusing of nanosecond laser beam on Ti target in distilled water. The geometry of craters is important in some applications such as micromachining. In this paper we concentrate on the diameter of the craters. The crater geometry was characterized by using an optical microscope. Different laser fluences were used in the experiment and their effects on the crater diameter were studied. Target was placed inside the water cell and the experiment was carried out for different water depths. The results show that for higher fluences, the crater diameters are larger. Results also show that the crater diameters’ can be varied if the water depth is changed. 

Keywords: Crater diameter, High power pulsed laser, Laser ablation, Liquid interaction medium, Metal target.

Full-Text [PDF 577 kb]   (906 Downloads)