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Measurements of intrinsic efficiency and parameters of an electron beam pumped ArXe laser

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2 Author(s)
Watterson, R.L. ; Sci. Res. Lab. Inc., Somerville, MA, USA ; Jacob, J.H.

Measurements of the output energy and intrinsic efficiency of an electron-beam-pumped ArXe laser operating on the 1.73-μm line are reported. A 220-kV electron beam was used to pump either an 11×11×50 cm3 or an 11×11×25 cm3 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/cm3 were employed. At a pump power of 2.2 kW/cm3 a small signal of 0.035 cm-1 , a gain-to-loss ratio of 272, and a saturation flux of 2.1 kW/cm 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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Quantum Electronics, IEEE Journal of  (Volume:26 ,  Issue: 3 )