Experimental investigation of a CO2 amplifier with a mirror utilizing a degenerate four-wave interaction

A description is given of the construction of a two-pass CO₂ amplifier system with a mirror utilizing a degenerate four-wave interaction in SF₆ gas and having an output energy of about 30J with an angular divergence of 4.4×10^–4 rad at 50% of the maximum energy. A partial compensation of simulated inhomogeneities introduced into the signal beam was observed.