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Propagation of axially symmetric flattened Gaussian beams

1996; Optica Publishing Group; Volume: 13; Issue: 7 Linguagem: Inglês

10.1364/josaa.13.001385

1520-8532

V. Bagini, Dario Ambrosini, Giuseppe Schirripa Spagnolo, Riccardo Borghi, F. Gori, A. M. Pacileo, Massimo Santarsiero,

Photonic Crystal and Fiber Optics

Flattened Gaussian beams are characterized by a waist profile that passes in a continuous way from a nearly flat illuminated region to darkness. The steepness of the transition region is controlled by an integer parameter N representing the order of the beam. Being expressible as a sum of N Laguerre–Gauss modes, a flattened Gaussian beam turns out to be very simple to study as far as propagation is concerned. We investigate the main features of the field distribution pertaining to a flattened Gaussian beam throughout the space and present experimental results relating to the laboratory production of this type of beam.