A.M.Zabelin, A.N.Safonov, V.O.Alexsandrov.

The proposed invention falls into field of laser technique. Problems of this invention consists in magnification of laser output power and construction simplification of a gas pumping and cooling unit. These problems are decided because of that the housing of the axial compressor is located in a cover with a backlash between them for pass of gas, and input shaper and output bifurcating device are connected to this cover from two sides. Besides, the cover has a conical shape and appears simultaneously a part of input gas stream shaper, the end of heat-transport system is located near an input side ofthe cover, and the axial compressor has the device for adjustment of a backlash between its housing and cover.