Patent ID: 6891874

Claim:
A laser amplifier system comprising: a solid body having a laser-active medium, a pump radiation source for producing a pump radiation field which passes multiple times through the solid body in order to provide optical pumping of said laser active medium, and a focusing system which receives the pump radiation field exiting from the pump radiation source and produces a plurality of different branches of the pump radiation field that enter the solid body, and which converts at least one branch that emerges from the solid body into one of the branches that enter the solid body with trajectories different from the trajectory of the emerging branch, the focusing system comprising at least one deviating unit which, by radiation field deviation relative to a single symmetry plane, converts at least two first sub-branches, formed from at least two different branches of the pump radiation field that emerge from the solid body, into at least two corresponding second sub-branches with trajectories locally separate from the first sub-branches, from which at least two branches that enter the solid body are obtained.