Superposition of Kummer beams produced by a spiral phase plate from Gori’s flattened-Gaussian beams
F. Khannous, L. Ez-zariy, H. Nebdi, M. Khouilid, A. Belafhal* Laboratory of Nuclear, Atomic and Molecular Physics P. B 20, 24000 * Corresponding author. E-mail: belafhal@gmail.com Received: 13 March 2013; revised version accepted: 10 September 2013
Abstract In this work, using a Spiral Phase Plate (SPP) the superposition of Kummer beams as a novel family of doughnut beams and solution of Helmholtz equation is generated from Gori’s flattened-Gaussian (GFTG) beams. Based on Collins-Huygens integral formula an analytical expression of the produced superposition of Kummer beams through a paraxial optical ABCD is developed. The propagations of GFTG beams through an SPP followed by a free space and by a lens system are numerically investigated respectively. The propagation of GTFG beams through an optical system without SPP and the propagation of Gaussian beams travelling an SPP followed by an optical system are derived as particular cases of our main finding. The propagation of GTFG beams in an SPP, followed by a free space and through a telescope, is also given, in the work, as examples of numerical simulations.
Keywords: Superposition of Kummer beams; Spiral Phase Plate; Gori’s flattened-Gaussian beams; ABCD-treatment; Telescope. |
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