Author:von Bergmann, HM; Forbes, A; Roberts, T; Botha, LRDate:Aug 2008Results 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
Author:Mafusire, C; Forbes, A; Snedden, Glen CDate:Aug 2010When 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
Author:Mafusire, C; Forbes, ADate:Jul 2011The 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
Author:Von Bergmann, H; Forbes, A; Roberts, T; Botha, LDate:2007In 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
Author:Mafusire, C; Forbes, A; Michaelis, MM; Snedden, Glen CDate:Aug 2010Gas 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