The results of an optimization procedure performed for a continuous wa
ve rf excited sealed CO2 waveguide laser are presented. Parameters tha
t affect laser performance, such as the excitation frequency, the gas
pressure, and composition, as well as the electrode temperature and di
fferent kinds of circuit losses have been analyzed. An output power of
41 W (17.7 kW/l) with an efficiency of 12% has been obtained from an
optimized laser with an active length 37 cm.