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Laser micro polishing with pulsed laser radiation is a process to reduce the micro roughness of surfaces. During polishing the properties of the laser radiation have a great influence on the results. In this publication the influence of the type of intensity distribution (near-Gaussian, top-hat), of its geometry (circular, square), and of the pulse duration (≈100-1400ns) on the roughness of tool steel (1.2343) surfaces is investigated. Additionally, the influence of the pulse duration on the maximal polishable spatial wavelength is examined.
Nüsser et al. (Sat,) studied this question.