Multikilowatt compact axial flow CO2 laser

Harry, J. E.; Evans, D. R.
February 1987
Applied Physics Letters;2/9/1987, Vol. 50 Issue 6, p313
Academic Journal
A high power, compact axial flow CO2 laser is described with a power output of 3.5 kW and a discharge length of 0.6 m using an unfolded cavity. The high power per unit length is achieved by the use of multiple electrodes with gas injection through porous anodes. Discharge currents of more than 2 A and cavity diameters up to 150 mm have been used with 12 anodes without the glow to arc transition occurring. An electrical to optical conversion efficiency of 23% has been achieved. The results indicate the effect of the current density and degree of turbulence in the transition regions of the discharges adjacent to the anodes in offsetting the glow to arc transition.


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