Abstract
The output performance of the wire-preionized transverse electric atmospheric CO2 laser is greatly enhanced when increased preionization is accomplished through a triple-discharge technique. Stable TEM00 mode oscillation of the laser is observed in the CO2:N2:He 1:1:1 mixture with input energy density of 240 J/l. The role of the second preionization becomes more significant for the higher charging voltages and for the gas mixtures containing less helium.
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