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Optical Engineering

Acoustic waves in transversely excited atmospheric CO2 laser discharges: effect on performance and reduction techniques
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Paper Abstract

Results are presented on the influence of acoustic waves on the performance of high-repetition-rate TEA CO2 lasers. It is shown that acoustic waves generated inside the laser cavity lead to nonuniform discharges, resulting in a deterioration of the laser beam quality, decreased output energy, and an increase in pulse-to-pulse energy variation. The effect of the gas mix on the acoustic behavior is investigated, and experimental results on laser performance across a range of gas mixtures are presented. Methods to reduce the effects of acoustic waves are presented together with experimental results. The influence of acoustic damping measures on laser gain are demonstrated, showing a significant improvement in gain and output power at high pulse repetition rates.

Paper Details

Date Published: 1 August 2008
PDF: 7 pages
Opt. Eng. 47(8) 084202 doi: 10.1117/1.2968227
Published in: Optical Engineering Volume 47, Issue 8
Show Author Affiliations
Hubertus M. von Bergmann, Stellenbosch Univ. (South Africa)
Andrew Forbes, Council for Scientific and Industrial Research (South Africa)
Ted Roberts, Council for Scientific and Industrial Research (South Africa)
Lourens Rasmus Botha, Scientific Development and Integration (South Africa)


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