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Abstract

A radiation amplifying system comprising a laser active medium for amplifying a radiation field and an optical assembly which defines an optical path for a pumping radiation field with which the laser active medium is optically pumped. The optical path comprises a plurality of branches and the optical assembly comprises at least two focusing units and a deflection arrangement. The laser active medium is spatially arranged between the at least two focusing units, and the focusing units define several pumping branches of the optical path for focusing the pumping radiation field which propagates along the optical path onto a pumping area in the laser active medium. Several deflection units of the deflection arrangement define respective deflection branches of the optical path for connecting the several pumping branches. The optical path comprises at least one correction branch for correcting at least one mismatch in the optical assembly to a focusing condition.

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