Product Code: ICA12_807

Process-Reliable & Cost-Effective Laser Materials Processing
Authors:
Marco Lentjes, LIMO, Lissotschenko Mikrooptik GmbH; Dortmund Germany
Peter Bruns, LIMO, Lissotschenko Mikrooptik GmbH; Dortmund Germany
Michael Voss, LIMO, Lissotschenko Mikrooptik GmbH; Dortmund Germany
Klaus Reinecke, LIMO, Lissotschenko Mikrooptik GmbH; Dortmund Germany
Vitalij Lissotschenko, LIMO, Lissotschenko Mikrooptik GmbH; Dortmund Germany
Presented at ICALEO 2012

LIMO has developed the new generation DIOCUT systems with an output power in the range of 1.3 kW up to 4 KW out of a 400µm core fiber NA 0.12. Direct fiber coupled diode lasers have the potential to be most efficient in comparison to other laser approaches since they work without a brightness converter as a key component. Based on LIMO's unique production technology, special free-form refractive optics were developed that enable highest coupling efficiency and consequently, a wall-plug efficiency including cooling system of 30% for the total laser system. To demonstrate the benefits of direct diode lasers in the KW power range, concepts, data of laser characterization as well as application results are presented. Cutting samples of various materials from steel to aluminum alloys up to 10 mm were fabricated with high velocity. Reduced roughness of the cut edge (6mm stainless steel: Rz < 30µm) is one major cutting quality improvement.