Adnan Gorur

Surface line and plug flow models governing laser produced vapour from metallic surfaces

In this study a line surface and plug-flow models are examined. The laser beam/target interactions present alternative explanations for the previously noted observations of vapour ejection in the bursts. The importance of choosing between these models rests in the potential difference, in estimates for fluid and vapour variables and in possible inferences for adjacent regions.

Focusing for laser hole drilling

Abstract The power intensity distribution of a laser beam across the focal plane is important for producing good hole geometry. To examine the power intensity distribution in the region of the image plane of a practical lens, a diffraction integral method is employed. Lens aberration is accounted for by the intensity of the appropriate phase changes. In the analysis, a free-running pulsed multimode solid-state laser is considered and the lens is assumed to have aberrations. Since an on-axis object is examined, only spherical aberration is taken into account.