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Input/output power scaling of a compact (0.8 L) kinetically enhanced copper-vapor laser

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5 Author(s)
R. P. Mildren ; Centre for Lasers & Applications, Macquarie Univ., North Ryde, NSW, Australia ; G. D. Marshall ; M. J. Withford ; D. W. Coutts
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We report the performance of a kinetically enhanced copper-vapor laser of active dimensions 32-mm inner diameter by 1-m long as a function of the plasma tube thermal insulation. By reducing the insulation to levels much lower than typically used for conventional copper-vapor lasers, the input power for maximum steady-state output increased from 5.9 to 7.4 kW, whereas the laser wall-plug efficiency was constant at approximately 1.4%. At the highest input power, we obtained 104 W at the specific output power 130 W/liter. The depletion of Cu atoms from the axial region by gas heating and ion-pumping depletion is similar to that of copper-vapor lasers having much lower specific input power and the laser gain remains peaked on-axis.

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IEEE Journal of Quantum Electronics  (Volume:39 ,  Issue: 6 )