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The paper reports on the design, manufacturing and preliminary characterization of a new compact and high beam quality laser diode multi-emitter module able to deliver about 300 W in a standard 105/125 fiber with 0.22 numerical aperture and 95% of power is in NA 0.15. The layout exploits a proprietary architecture and uses a plurality of 905 nm and 940 nm chips properly combined through spatial, polarization and wavelength multiplexing. Given its small footprint and low ownership costs, the module has been specifically devised as a direct diode laser source for small/mid size metal powder based additive manufacturing machines

Development of a 300W 105/0.15 fiber pigtailed diode module for additive manufacturing applications