Laser-based joining of components

A joining device for laser radiation-based joining of at least two components at a joining zone, the joining device comprising:

• a first laser radiation source having a predetermined power configuration and configured to emit first laser radiation;
• a first radiation guide connected to the first laser radiation source to couple the first laser radiation emitted from the first laser radiation source into the first radiation guide, the first radiation guide having a first radiation outlet;
• a second laser radiation source having a predetermined power configuration and configured to emit second laser radiation, the second laser radiation source being different from the first laser radiation source;
• at least one second radiation guide connected to the second laser radiation source to couple the second laser radiation emitted from the second laser radiation source into the at least one second radiation guide, the at least one second radiation guide having a second radiation outlet;
• a focuser:
• coupled to the first radiation guide and to the at least one second radiation guide;
• and
• configured to focus each of the first and second laser radiations at a distance from each other into the joining zone of the at least two components;
• and
• a coupler having a multi-core fiber for guiding radiation and a number of fiber cores corresponding to a sum of a number of the first radiation guide and the at least one second radiation guide and configured such that the fiber cores extend parallel to one another;
• and
• the fiber cores are respectively coupled to:
• one of the first radiation outlet and the at least one second radiation outlet;
• and
• the focuser.