title: Generation of partially coherent diffraction-free fields with tunable geometry.
abstract: The synthesis of diffraction-free fields with different profiles is described. The synthesis is done by illuminating a screen containing a circular slit with a cosine beam. The treatment is equivalent to the modulation of the slit transfer characteristics and makes possible a tunable interference interaction of Bessel beams with noncommon axes. These results are generalized, and it is shown that coherent diffraction-free fields with arbitrary profiles can be expressed as the superposition of shifted zero-order Bessel beams and temporary parametric representations of the shifted functions. Diffraction-free fields with partially coherent features can be obtained. Experimental results are shown for each case.
authors.affiliation: Instituto Nacional de Astrofísica, Optico y Electrónica, Departamento de Optica, Grupo de Optica Estadística, Apartado 51 y 216, C. P. 72000 Puebla, México. gmartin@inaoep.mx
authors.forename: Gabriel
authors.initials: G
authors.lastname: Martínez-Niconoff
authors.forename: Julio C
authors.initials: JC
authors.lastname: Ramírez-San-Juan
authors.forename: Patricia
authors.initials: P
authors.lastname: Martínez-Vara
authors.forename: Adrián
authors.initials: A
authors.lastname: Carbajal-Domínguez
authors.forename: Andrei S
authors.initials: AS
authors.lastname: Ostrovsky