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Microwave excitation of a diffusion-cooled CO2laser

Authors :
W Oestreicher
M Marz
Source :
Journal of Physics D: Applied Physics. 27:470-474
Publication Year :
1994
Publisher :
IOP Publishing, 1994.

Abstract

A microwave-excited (2.45 GHz), diffusion-cooled CO2 laser, capable of operating in a quasi-cw mode, has been developed. By separating the discharge structure from the feeding RF waveguide and using distributed coupling, previous problems with local contracting discharges could be surmounted. For effective diffusion cooling a planar 1.9 mm high discharge channel was used, a structure which easily allows area scaling of laser output power. Two discharge channel designs (metal/glass and all ceramic) were investigated, differing mainly in thermal conductivity and waveguide losses for the 10.6 mu m laser radiation. A conventional magnetron for microwave ovens was used as microwave source. System design and extensive measuring results are presented. With a first prototype non-optimized in gas mixture, optical resonator and waveguide surface quality laser output power above 20 W was obtained with an efficiency of about 10%.

Details

ISSN :
13616463 and 00223727
Volume :
27
Database :
OpenAIRE
Journal :
Journal of Physics D: Applied Physics
Accession number :
edsair.doi...........d6459190821a5553444d3093fb7f6546