Laser ablation and structuring of hard coating with ultra-short laser pulses

Abstract

For material processing one of the main advantages of using ultra short laser pulses, comparing to long pulses, is the highly localized modification. Ultra short pulse laser modification of materials is valuable for their application in nanotechnology, tribology, microelectronics, medical application, etc. In this paper, special attention is paid to experimental investigations of femtosecond laser surface modification of hard protective coating. The sample has been processed by a Ti:sapphire laser with pulse duration of 200 fs and wavelength of 775 nm. Single and multi pulse irradiation were performed in air. Various analytical techniques were used for characterization. The damage threshold for the examined coating, irradiated by 200 fs pulses, was determined