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Proceedings Paper

Influence of acoustic waves on TEA CO2 laser performance
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Paper Abstract

In this paper we present results on the influence of acoustic waves on the output laser beam from high repetition rate TEA CO2 lasers. We show that acoustic waves generated inside the cavity lead to deterioration in beam quality, decreased output energy, and an increase in pulse to pulse energy variation. We investigate the impact of gas mix on the acoustic behaviour, and present experimental results on laser performance across a range of gas mixtures. Solutions to the acoustic wave problem 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 repetition rates. The link between the pre-ionisation method employed and the acoustic wave impact on laser performance is discussed.

Paper Details

Date Published: 26 April 2007
PDF: 8 pages
Proc. SPIE 6346, XVI International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 634606 (26 April 2007); doi: 10.1117/12.737142
Show Author Affiliations
Hubertus von Bergmann, Univ. of Stellenbosch (South Africa)
Andrew Forbes, CSIR National Laser Ctr. (South Africa)
Ted Roberts, CSIR National Laser Ctr. (South Africa)
Lourens Botha, CSIR National Laser Ctr. (South Africa)


Published in SPIE Proceedings Vol. 6346:
XVI International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers

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