Patent ID: 7542501

Claim:
Laser system comprising a laser radiation field guide, in which a laser radiation field extends, at least one laser-active solid body, which is passed through by the laser radiation field and extends in the direction of a longitudinal axis between two mutually opposite end faces, a pumping radiation source for generating pumping radiation for the optical pumping of the laser-active solid body, and a pumping radiation guide, which divides the pumping radiation for pumping the solid body into a first and a second partial radiation field and which feeds the first partial radiation field into the solid body in a longitudinal direction via one end face and feeds the second partial radiation field into the solid body in a longitudinal direction via the other end face, the laser radiation field passing through at least two laser-active solid bodies of identical material disposed one following the other in the direction of its beam axis, the pumping radiation guide being formed in such a way that it feeds into each of the solid bodies the first partial radiation field via one end face and the second partial radiation field via the other end face and the pumping radiation guide being formed in such a way that a pumping power fed into each of the at least two solid bodies by the two partial radiation fields can be adjusted in such a way that the effects on the laser radiation field of thermal lenses produced by the pumping power in each of the at least two solid bodies are substantially identical.