Abstract
Measurements of the output energy and intrinsic efficiency of an electron-beam-pumped ArXe laser operating on the 1.73- mu m line are reported. A 220-kV electron beam was used to pump either an 11*11*50 cm/sup 3/ or an 11*11*25 cm/sup 3/ active volume. Small-signal gain, nonsaturable loss, and saturation flux were deduced from a Rigrod analysis of the output energies as a function of output coupler reflectivity. Electron beam pump powers ranging from 2.2 to 16.2 kW/cm/sup 3/ were employed. At a pump power of 2.2 kW/cm/sup 3/ a small signal of 0.035 cm/sup -1/, a gain-to-loss ratio of 272, and a saturation flux of 2.1 kW/cm/sup 2/ were determined. Intrinsic efficiencies of 4% were obtained at the lower pump powers. From the measurements of the laser output it is clear that the secondary electrons have a significant impact on the laser kinetics and efficiency. >
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