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CO2 laser resonator: some new aspects in the design

The results of the investigation of the beam quality of the high-power industrial CO2 laser are presented. As a result of this investigation, a scheme of the modified stable-unstable resonator is proposed, that uses only reflective mirrors. In this scheme, the plane of the unstable telescopic resonator is transverse to the flow of the discharge chamber. In the plane parallel to the electrodes, this scheme represents a single-mode stable resonator. High efficiency of this resonator and high beam quality have been pointed out.