Focusing of axially symmetric flattened Gaussian beams

M. Santarsiero Dipartimento di Fisica, Universitá ‘La Sapienza’ di Roma, P.le A. Moro, 2 00185, Rome, Italy

D. Aiello Dipartimento di Fisica, Universitá ‘La Sapienza’ di Roma, P.le A. Moro, 2 00185, Rome, Italy

R. Borghi Dipartimento di Fisica, Universitá ‘La Sapienza’ di Roma, P.le A. Moro, 2 00185, Rome, Italy

S. Vicalvi Dipartimento di Fisica, Universitá ‘La Sapienza’ di Roma, P.le A. Moro, 2 00185, Rome, Italy

Abstract

We study the three-dimensional field distribution of a focused axially symmetric flattened Gaussian beam. In particular, exact closed-form expressions for the intensity along the optical axis and at the focal plane are provided, together with a comparison between our results and those pertinent to the case of a converging spherical wave diffracted by a hard-edge circular aperture. Some hints for future investigations are also given.

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Focusing of axially symmetric flattened Gaussian beams

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