Focused Gaussian beam in the paraxial approximation

Year: 2020

Authors: Das A., Soltani N., Agio M.

Autors Affiliation: Laboratory of Nano-Optics and Cμ, University of Siegen, 57072 Siegen, Germany;
National Institute of Optics (INO), National Research Council (CNR), 50125 Florence, Italy

Abstract: A focused Gaussian beam represents a case of highly practical importance in many areas of optics and photonics. We derive analytical expressions for a focused Gaussian beam in the paraxial approximation, considering an arbitrary lens filling factor. We discuss the role of higher-order Bessel functions of the first kind in defining the electric field in the focal region.

Journal/Review: OPTICS LETTERS

Volume: 45 (24)      Pages from: 6752  to: 6754

KeyWords: focusing, Gaussian beams
DOI: 10.1364/OL.414302

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