Pulse modulation method controls heat input, increasing quality of weld seams and preventing cracking.Barbara Stumpp, Freelance Science WriterLasers are versatile tools with negligible changeover times in manufacturing processes, but in some areas their uses are still suboptimal, such as in welding. Crack formation and problems with fusion of material can still occur and hinder the quality of construction. The German state of Hesse and Sigma Laser GmbH, in cooperation with professor Klaus Behler’s team from Germany’s Technical University of Applied Sciences Mittelhessen (THM), researched means to address these issues. 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