RADIATION DIVERGENCE OF PLANAR GAS-LASERS

The spatial characteristics of the output radiation of planar gas lase rs having different cavity schemes (one-dimensional unstable telescopi c configuration, coherent multichannel cavity, and a scheme filtering a high-order transverse mode) are calculated. The theoretical results agree with the experimental data available in the literature. The depe ndences of the energy light intensity on the angular width of the outp ut beam for the considered cavity configurations are determined. The o btained results enable us to determine the energy concentration that c an be provided by each of the configurations for different types of la ser systems with arbitrary geometric sizes of the active medium.