Abstract

A capacitively coupled transverse radio frequency discharge has been successfully applied to excite a CO laser with a closed-cycle fast axial flow. The discharge and laser characteristics are described and the role of the O2 added to CO/N2/He mixtures is discussed. For a mixture of CO/N2/He/O2=7.5/12.5/80/0.8 an output of about 1 kW has been obtained at an entrance gas temperature of 160 K. Stable output with good beam quality has been demonstrated.

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