title: Influences of twist phenomenon of partially coherent field with uniform-intensity diffractive axicons.
abstract: The effects of twist phenomenon (beam rotation) of a partially coherent field are studied on the operation of two classes of uniform-intensity diffractive axicons. A general theory of axicon image formation is developed, discussed, and examined. We show that the intensity of the diffracted field is a multiple Bessel field, and only the energy of the zero-order Bessel field diffracts along the propagation axes. We also show that, at any twist strength in all correlation levels, the images can be evaluated by using the stationary-phase method. The three-dimensional stationary-phase formula of axicon images is derived. Such formula may be used in fast image evaluation, for designing diffractive axicons that perform a uniform axial intensity in a twisted partially coherent field.
authors.affiliation: Physics Department, Faculty of Science, Sana’a University, Sana’a, Yemen. aa_alkelly@yahoo.com
authors.forename: Abdu A
authors.initials: AA
authors.lastname: Alkelly
authors.forename: M
authors.initials: M
authors.lastname: Shukri
authors.forename: Y S
authors.initials: YS
authors.lastname: Alarify