Ultrashort Pulsed Laser Processing

[SLPC3-01(Invited)] Ultra-Short Pulsed Laser Ablation of Metals with Burst Pulses: Concepts, Opportunities and Misconceptions

*Beat Neuenschwander¹, Stefan M. Remund¹, Daniel J. Foerster² (1. Institute for Applied Laser, Photonics and Surface technologies ALPS, Bern University of Applied Sciences, Switzerland, 2. LightPulse LASER PRECISION, Germany)

The idea of burst pulses is to divide a high pulse energy into several individual pulses that follow each other at short intervals (a few 10 ns up to a few 100 ps). Thus, each individual pulse in the burst gets closer to the optimal fluence associated with a maximal conversion of the pulse energy. Compared to a process with high-energy single pulses, the process with burst pulses becomes significantly more efficient at the same laser repetition rate.