TRUMPF Laser GmbH

A processing head for guiding a laser beam for processing a workpiece includes a housing main body configured to accommodate a beam guiding element. The housing main body has a first main surface section and a second main surface section. The processing head further includes a functional module configured to connect to the housing main body or to be inserted into the housing main body. The first main surface section and the second main surface section of the housing main body are aligned with one another, at least partly surround a free internal volume of the housing main body, and are configured differently from one another for receiving and/or for inserting the functional module and/or a functional component.

A method for joining at least two parts by using ultrashort laser pulses of a laser beam of an ultrashort pulse laser is provided. At least one of the two parts to be joined is transparent for a wavelength of the ultrashort laser pulses. The method includes joining the at least two parts by using the ultrashort laser pulses of the laser beam along a joining seam. The joining seam has at least two joining points and a joining gap lying between the at least two joining points. Each joining point is longer than 10 μm.

A method for laser processing of a workpiece that has a transparent material includes dividing an input laser beam into a plurality of sub-beams by using a beam splitting element, focusing the sub-beams coupled out of the beam splitting element to form multiple focus elements, and applying the focus elements to the material of the workpiece for the laser processing. The focus elements are moved relative to the material in a feed direction. A first sub-quantity of the focus elements is arranged in a first plane. A second sub-quantity of the focus elements is arranged in at least one other plane. The first plane and the at least one other plane are spaced apart in the feed direction. The first plane and the at least one other plane are orientated perpendicular to the feed direction.

A method for separating a workpiece includes providing a machining laser beam that forms a plurality of focusing elements, introducing the focusing elements into a material of the workpiece, and moving the focusing elements parallel to an advancing line relative to the material. Material modifications are formed in the material along a machining surface that protrudes with respect to a partial region of the workpiece in a preferred direction. The method further includes subjecting the material to a heating laser beam that is moved relative to the material along a heating laser beam advancing line, thereby separating the material along the machining surface. The heating laser beam advancing line runs parallel to and is spaced apart from the advancing line with a positional offset that is anti-parallel to the preferred direction. The positional offset is at least 10% and at most 50% of a diameter of the heating laser beam.

A laser system for laser machining a workpiece using an interference pattern includes at least one laser beam source for providing a plurality of coherent laser beams, an amplification device for forming amplified coherent laser beams by amplifying the plurality of coherent laser beams, a phase adjustment device for adjusting a phase difference between the plurality of coherent laser beams and/or the amplified coherent laser beams, and a beam convergence region in which output laser beams based on the amplified coherent laser beams or corresponding to the amplified coherent laser beams converge to form the interference pattern. At least beam portions of the different output laser beams converge in the beam convergence region.

A method for producing dimples on a surface of a transparent material using laser pulses of a short-pulse laser is provided. The method includes producing at least one dimple of the dimples on the surface of the transparent material by using a single laser pulse or a single laser burst.

A transparent component includes a functionalized surface. The functionalized surface has dimples and laser-induced periodic surface structures. The functionalized surface is functionalized by the dimples and the laser-induced periodic surface structures. The dimples and the laser-induced periodic surface structures spatially overlap. The dimples have a depth between 100 nm and 2000 nm.

A method for processing a material by using laser pulses of a pulsed laser includes introducing the laser pulses into the material in order to process the material. The laser pulses are introduced into the material in a distributed manner spatially statistically around a spatial target value. A spatial statistical distribution of the laser pulses is capable of being adjusted and adapted according to a current feed rate.

A device for coupling a laser beam into a double-clad fiber includes a first birefringent optical element configured to split the laser beam into two sub-laser beams polarized along base polarization components of the first birefringent optical element, a polarization rotation device configured to adjust a polarization of the sub-laser beams to provide polarization-adjusted sub-laser beams, a second birefringent optical element configured to split each of the polarization-adjusted sub-laser beams into two sub-sub-laser beams polarized along base polarization components of the second birefringent optical element, and an in-coupling optical unit configured to couple the sub-sub-laser beams with compensated first exit angles and/or first beam displacements into an inner core of the double-clad fiber, and to couple other sub-sub-laser beams into an annular core of the double-clad fiber.

A laser processing machine for laser processing a workpiece by a processing laser beam includes a laser beam generator for generating the processing laser beam, a processing optical unit for directing the processing laser beam onto the workpiece, and a frequency-comb-based distance sensor. The distance sensor includes a laser source that is fed back in a frequency-shifted manner for generating a sensor laser beam with a frequency comb that spectrally shifts over time. The sensor laser beam is divided into a measurement beam and a reference beam along a measurement path and a reference path, respectively. The distance sensor further includes a detector, and an evaluation device configured to ascertain a distance value based on a frequency difference, resulting from a time-of-flight difference of the measurement beams and the reference beams superimposed on the detector, of two frequency combs originating from the measurement path and the reference path.