Mafusire, CForbes, ASnedden, Glen CMichaelis, MM2009-10-212009-10-212008Mafusire, C, Forbes, A, Snedden, GC and Michaelis, MM. 2008. Spinning pipe gas lens revisited. South African Journal of Science, Vol. 104(7&8). pp 260-2640038-2353http://hdl.handle.net/10204/3670Copyright: 2008 Academy of Science of South AfricaThe graded index (GRIN-like) medium generated by gas inside a heated steel pipe when rotated about its longitudinal axis has the ability to focus a laser beam. While the effective focal length of such a system has previously been studied, there is little information on optical phase aberrations and no study to date on the propagation parameters of the laser beam, but has rather remained rooted in the domain of ray optics. Researchers revisit the spinning pipe gas lens in this paper with new perspectives on the propagation of optical waves, and show how the position of the focus is not a measure of the focal length of the lens. This paper make use of both the intensity and phase information carried by waves to accurately measure the salient parameters of the lens, and complement our experimental findings with a computational fluid dynamics model.enSteel pipeGraded index mediumGas lensSpinning pipe gas lensLaser beam propagationComputational fluid dynamic modelLaser beamGRIN-likeOptical wavesArticleMafusire, C., Forbes, A., Snedden, G. C., & Michaelis, M. (2008). Spinning pipe gas lens revisited. http://hdl.handle.net/10204/3670Mafusire, C, A Forbes, Glen C Snedden, and MM Michaelis "Spinning pipe gas lens revisited." (2008) http://hdl.handle.net/10204/3670Mafusire C, Forbes A, Snedden GC, Michaelis M. Spinning pipe gas lens revisited. 2008; http://hdl.handle.net/10204/3670.TY - Article AU - Mafusire, C AU - Forbes, A AU - Snedden, Glen C AU - Michaelis, MM AB - The graded index (GRIN-like) medium generated by gas inside a heated steel pipe when rotated about its longitudinal axis has the ability to focus a laser beam. While the effective focal length of such a system has previously been studied, there is little information on optical phase aberrations and no study to date on the propagation parameters of the laser beam, but has rather remained rooted in the domain of ray optics. Researchers revisit the spinning pipe gas lens in this paper with new perspectives on the propagation of optical waves, and show how the position of the focus is not a measure of the focal length of the lens. This paper make use of both the intensity and phase information carried by waves to accurately measure the salient parameters of the lens, and complement our experimental findings with a computational fluid dynamics model. DA - 2008 DB - ResearchSpace DP - CSIR KW - Steel pipe KW - Graded index medium KW - Gas lens KW - Spinning pipe gas lens KW - Laser beam propagation KW - Computational fluid dynamic model KW - Laser beam KW - GRIN-like KW - Optical waves LK - https://researchspace.csir.co.za PY - 2008 SM - 0038-2353 T1 - Spinning pipe gas lens revisited TI - Spinning pipe gas lens revisited UR - http://hdl.handle.net/10204/3670 ER -