Abstract: 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 ?m.

Abstract: A method for monitoring a laser welding process for welding two workpieces using a laser wavelength, in which a pulsed laser beam is directed into the workpieces so as to melt a melting volume in a region of an interface of the two workpieces in order to produce a weld seam, and in which an intensity of a process radiation emitted by the melting volume is detected. According to the method for monitoring the lase welding process, in a first step, a detected intensity profile is evaluated with regard to at least one of the following features: (i) a depth of an intensity decrease, (ii) a duration of an intensity decrease, and (iii) a renewed increase in intensity after an intensity decrease. In a second step it is determined whether or not a gap between the two workpieces was bridged during the laser welding process based on the evaluation.

Abstract: A method is for processing at least one workpiece. The method includes applying a pulsed laser beam to a process zone of the at least one workpiece. The energy coupled into the process zone by the laser beam is temporally modulated.

Abstract: The present disclosure relates to methods and devices for monitoring a welding process for welding at least one glass workpiece to another workpiece, the workpieces being welded together in a process zone that is exposed to a processing beam, e.g., to a laser beam, such as an ultra-short-pulse laser beam, wherein radiation emitted by the process zone and originating from at least one of the workpieces is detected in a spatially resolved manner.

Abstract: The present disclosure relates to methods and systems for monitoring a welding process for welding at least one glass workpiece to another workpiece, e.g., also made of glass, wherein a weld seam is formed in the workpieces in a process zone that is exposed to a pulsed processing beam, e.g., to a pulsed laser beam, such as an ultra-short-pulse laser beam, wherein the radiation emitted by the process zone is detected in a time-resolved manner.