title: Refracting System for Annular Gaussian-to-Bessel Beam Transformation.
abstract: A refracting system is designed for transforming an annular Gaussian laser beam into a circular Bessel beam. The slope of the input and output surfaces fitted well with a sixth-order polynomial. The radii of curvature of the resulting aspheric surfaces are found to vary smoothly over the surface. The diffraction-free length for this system is found to be 59.4735 m at 633 nm.
authors.forename: M
authors.initials: M
authors.lastname: Arif
authors.forename: M M
authors.initials: MM
authors.lastname: Hossain
authors.forename: A A
authors.initials: AA
authors.lastname: Awwal
authors.forename: M N
authors.initials: MN
authors.lastname: Islam