Product Code: ICA11_M1208

Sinusoidal Surface Texturing Using a Nanosecond MOPA Pulsed Fiber Laser
Authors:
Whitney P. Davis, Southern Methodist University; Dallas TX USA
Sami T. Hendow, Multiwave Photonics; Maia Portugal
Radovan Kovacevic, Southern Methodist University; Dallas TX USA
Presented at ICALEO 2011

Sinusoidal surface texturing and roughness modification generated on aluminum and stainless steel alloy substrates using a diode-pumped pulsed fiber laser are investigated as a pre-processing step for improved adhesive bonding. Different processing parameters are modified in order to assess their effect on the resulting surface topology; a power of 9.5 W, pulse width 200 ns, beam diameter spot size 14-17 µm, and pulse energy up to 0.5 mJ, a sinusoidal profile is obtained for optimizing the surface area in contact for adhesion. Previous experimental results have shown that longer pulse widths at lower peak powers increase the depth of penetration creating a favorable topology for the constrained area.