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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/2461

Title: Acoustic waves in transversely excited atmospheric CO2 laser discharges: effect on performance and reduction techniques
Authors: von Bergmann, HM
Forbes, A
Roberts, T
Botha, LR
Keywords: Acoustic waves
TEA CO2 lasers
Standing waves
Beam quality
Issue Date: Aug-2008
Publisher: International Society for Optical Engineering
Citation: von Bergmann, HM, Forbes, A, Roberts, T and Botha, LR. 2008. Acoustic waves in transversely excited atmospheric CO2 laser discharges: effect on performance and reduction techniques. Optical Engineering, Vol. 47(8), pp 084202-1 - 084202-7
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 behaviour 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
Description: Copyright 2008: Society of Photo-Optical Instrumentation Engineers
URI: http://hdl.handle.net/10204/2461
ISSN: 0091-3286
Appears in Collections:Laser physics and technology
General science, engineering & technology

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