Laser device and method for processing at least one workpiece by means of at least one laser beam

A laser device for processing a workpiece by using at least one laser beam, the laser device being configured to:

• generate the at least one laser beam,
• focus the at least one laser beam onto the workpiece so that the at least one laser beam generates a laser spot on the workpiece, wherein the laser spot has a core region and a ring region, wherein an average laser power density in the core region is higher than an average laser power density in the ring region, and
• vary the average laser power density in the core region with a first variation frequency of at least 50 kHz and a first variation amplitude of at least 10% of the average laser power density in the core region, and/or vary the average power density in the ring region with a second variation frequency of at least 50 kHz and a second variation amplitude of at least 10% of the average laser power density in the ring region.