Tailored Bar Concepts for 10mm-mrad Fiber Coupled Modules Scalable to kW-Class Direct Diode Lasers - Photonics West 2015
Direct diode lasers for materials processing in the kW power range are a highly active field of research and will potentially replace fiber lasers in applications like remote welding and sheet metal cutting. In this paper, laser modules based on newly developed tailored bars are presented. The modules allow efficient fiber coupling of more than 320 W into 10 mm-mrad or 160 W into 6 mm-mrad at one single wavelength. For further power scaling dense wavelength coupling concepts are presented which enable kW-class lasers with a beam quality of 10 mm-mrad.