title: Bessel-like beams modulated by arbitrary radial functions
abstract: An approximate method for determining the radial and axial intensity of a Bessel-like beam is presented for the general case in which a radial Bessel distribution of any order is modulated by an arbitrary function. For Bessel-Gauss, generalized Bessel-Gauss, and Bessel-super-Gauss beams, this simple approximation yields results that are very close to the exact values, while they are exact for Bessel beams. A practical beam that can be generated with a combination of simple lenses is also analyzed and illustrated.
authors.affiliation: Department of Physics, The Pennsylvania State University, University Park 16802, USA.
authors.initials: RM
authors.lastname: Herman
authors.initials: TA
authors.lastname: Wiggins