Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

The relevance of brightness for high power laser cutting and welding

: Petring, D.; Schneider, F.; Wolf, N.; Nazery, V.

Lu, Y. ; Laser Institute of America -LIA-:
ICALEO 2008, 27th International Congress on Applications of Lasers & Electro Optics. Congress proceedings. CD-ROM : October 20-23, 2008, Temecula, CA, USA
Orlando, Fla.: LIA, 2008 (LIA 611=101)
ISBN: 978-0-912035-12-3
International Congress on Applications of Lasers & Electro Optics (ICALEO) <27, 2008, Temecula/Calif.>
Fraunhofer ILT ()

Is there an optimum brightness regime for macro laser processing of materials? Does increased brightness always improve productivity? These questions have been vigorously discussed since lasers offering beam properties near to the theoretical diffraction limit in the multi-kW range have become available. As a contribution to this debate this paper begins by describing the brightness map of modern industrial laser types. Following this, the theoretical consequences of various brightness levels on the physics of the interaction zone and on achievable speed and maximum sheet thickness are evaluated. Finally the practical impact of brightness on the cutting and welding capabilities of laser systems is demonstrated by means of various experimental results with fiber and disk lasers up to 8 kW.