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Experimental development of high-power fiber lasers
Specialists in fiber laser technology from Germany and Israel are conducting experiments with a newly developed fiber laser for industrial use. The system is based on the Coherent Beam Combining (CBC) method, which is still relatively new for high-power fiber lasers.
According to the researchers, the 13-kilowatt fiber laser can rapidly create various energy distribution patterns during operation, allowing precise and efficient processing of demanding materials. The goal is to make this innovative technology available to companies and manufacturers worldwide. The team expects these experiments to open new laser applications, making a significant contribution to fields such as medical technology and aerospace.
Innovations in laser beam shaping
Dynamic beam shaping for additive manufacturing
The research team is now studying laser beam shaping accelerated by a factor of 1000, applied for the first time in additive manufacturing. They use the Coherent Beam Combining method, where the Dynamic Beam Laser merges many individual beams into one powerful, high-quality beam. Tiny phase shifts in the individual beams allow the fiber laser to quickly generate different energy distribution patterns.
New energy patterns for improved processing
The new fiber laser system can form specific energy patterns on workpieces, such as a horseshoe or a ring. In contrast, conventional fiber lasers concentrate most of the energy in the beam center. Previously, such shaping was possible only with beam-deflecting optics or oscillating mirrors, which required milliseconds to change patterns. The new fiber laser performs these adjustments 1000 times faster — within microseconds — enabling its use in metal additive manufacturing.
Applications in additive manufacturing and industry
Metal 3D printing
The researchers aim to develop a modern fiber laser system for additive manufacturing of titanium and aluminum alloys, widely used in aerospace components and implants. They plan to apply dynamic laser beam shaping to eliminate defects and improve 3D printing quality. Novel beam shapes could also help overcome challenges with crack-sensitive materials.
Potential industrial impact
The experiments will show whether the new fiber laser system can be used for metal additive manufacturing. The proven advantages in quality and speed already make this technology promising for metalworking, electromobility, and aerospace industries.