CUTTING METHOD USING A LASER HAVING AT LEAST ONE YTTERBIUM-BASED FIBER, IN WHICH AT LEAST THE POWER OF THE LASER SOURCE, THE DIAMETER OF THE FOCUSED BEAM AND THE BEAM QUALITY FACTOR ARE CONTROLLED

摘要

The invention relates to method for cutting a part using a laser beam, involving the use of laser beam generation means comprising at least one ytterbium-based fibre having a wavelength of between 1 and 4 mum in order to generate the laser beam. The laser beam is selected to have a power of less than 100 kW, a power density of at least 1 MW/cm2, a focused beam diameter of at least 0.1 mm and a quality factor (BPP) of less than 10 mm.mrad.