Laser Beam Welding (LBW) finds widespread use in industries like naval and automotive. To meet the demands of complex welding processes, higher power lasers have been developed. However, conventional refractive optics limit power utilization, affecting robustness. Multi-Plane Light Conversion (MPLC), a fully reflective technology, enables complex beam shaping with 16kW lasers. A MPLC-based laser head with an 800µm annular shape at 1µm wavelength has been developed. LBW of 304L stainless steel (6mm thick) at 7kW and HLAW of steel (16kW) with 23mm penetration depth are successfully demonstrated. MPLC's extended depth of field improves welding efficacy, showcasing its potential in advancing laser welding applications.
The aim of this work is to demonstrate the processing of large metal foils by femtosecond laser in a roll-to-roll configuration using 2D Direct Laser Interference Patterning generate by MPLC technology, as an advanced surface functionalization for high-throughput manufacturing. Highly uniform 2D morphologies have been created on stainless steel, with a spatial periodicity of 14µm and an aspect ratio up to 0.7, suitable for numerous applications such as de-icing.
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