Generation of partially coherent diffraction-free fields with tunable geometry.
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.
Martínez-Niconoff
Gabriel
G
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
Ramírez-San-Juan
Julio C
JC
Martínez-Vara
Patricia
P
Carbajal-Domínguez
Adrián
A
Ostrovsky
Andrei S
AS