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

Author: von Bergmann, HM ; Forbes, A ; Roberts, T ; Botha, LR Date: Aug 2008 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 ... Read more
Computational fluid dynamics model of the spinning pipe gas lens

Author: Mafusire, C ; Forbes, A ; Snedden, Glen C Date: Aug 2010 When a metal horizontal pipe is heated and spun along its axis, a graded refractive index distribution is generated which is can be used as a lens, thus its name, the spinning pipe gas lens (SPGL). Previous experimental results of its performance ... Read more
Generalized beam quality factor of aberrated truncated Gaussian laser beams

Author: Mafusire, C ; Forbes, A Date: Jul 2011 The authors outline a theory for the calculation of the beam quality factor of an aberrated laser beam. They provide closed form equations that show that the beam quality factor of an aberrated Gaussian beam depends on all primary aberrations ... Read more
Influence of acoustic waves on TEA CO2 laser performance

Author: Von Bergmann, H ; Forbes, A ; Roberts, T ; Botha, L Date: 2007 In this paper the author’s present results on the influence of acoustic waves on the output laser beam from high repetition rate TEA CO2 lasers. The authors show that acoustic waves generated inside the cavity lead to deterioration in beam ... Read more
Optical aberrations in a gas lenses

Author: Mafusire, C ; Forbes, A ; Michaelis, MM ; Snedden, Glen C Date: Aug 2010 Gas lenses work on the basis that aerodynamic media can be used to generate a graded refractive index distribution which can be used to focus a laser beam. Examples of these are the spinning pipe gas lens (SPGL) and the flame lens (FL). The ... Read more

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Browsing by Subject "Beam quality"

Browsing by Subject "Beam quality"

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