1. Institute for Applied Laser, Photonics and Surface technologies ALPS, Bern University of Applied Sciences, Pestalozzistrasse
20, 3400 Burgdorf, Switzerland
2. LASEA Switzerland SA, Rue du Soleil 11, 2504
Biel/Bienne, Switzerland
3. Institut für Strahlwerkzeuge, University of Stuttgart, Pfaffenwaldring 43, 70569 Stuttgart,
Germany