Abstract
The effect of optical inhomogeneities of the activemedium of an electric-discharge XeCl laser excited by 300-nspulses on the divergence of amplified radiation is experimentally studied. The possibility of obtaining the diffraction-limited divergence of radiation at the output of the amplifieris shown. Under our conditions, for the pump power densityexceeding 400 kW cm-3 , the radiation divergence in mainlydetermined by the nonuniformity of the gain profile of theactive medium that appears at a certain stage of the dischargeburning. This property of the active medium is caused by thedevelopment of macro- and microinhomogeneities of the discharge current.
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