The invention relates to a laser amplifier system consisting of a solid body,
which comprises a laser-active medium, of a pumping radiation source for generating
a pumping radiation field, which repeatedly permeates the solid body, and of a
focusing system. Said focusing system generates a number of different branches
of the pumping radiation field that enter the solid body and converts at least
one branch emerging from the solid body into one of the branches which enter the
solid body and which are different from the emerging branch. The aim of the invention
is to improve a laser amplifier system of the aforementioned type in order to be
able to generate the highest possible pumping power density in the solid body while
requiring the smallest possible amount of complexity. To this end, the focusing
system comprises at least one deviating unit which converts, by deviating the radiation
field with regard to a single plane of symmetry, at least two first partial branches
formed from at least two different branches of the pumping radiation field emerging
from the solid into at least two corresponding second partial branches which locally
extend in a manner that is separate from the first partial branches and of which
at least two branches entering the solid body are formed.
