Generation of J_0 Bessel beams with controlled spatial coherence features

Abstract

An alternative method to generate J(0) Bessel beams with controlled spatial partial coherence properties is introduced. Far field diffraction from a discrete number of source points on an annular region is calculated. The average for different diffracted fields produced at several rotation angles is numerically calculated and experimentally detected. Theoretical and experimental results show that for this particular case, the J(0) Bessel beam is a limit when the number of points tends towards infinity and the associated complex degree of coherence is also a function of the number of points.

Mean intensity of a fundamental Bessel beam in turbulent atmosphere

“…Generally speaking in order to form such a beam in the all plane, infinite energy is required. 7 As shown in this work, 8 it is possible to also create a partially coherent Bessel beam. The limitation of the size of the radiating aperture leads to a limitation of the longitudinal size of the Bessel beam generated by this aperture.…”

Coherence of vortex beams in discrete scattering media

“…[1][2][3][4][5] However, till now propagation of vortex optical beams usually examine either in a homogeneous medium, or in a turbulent (randomly inhomogeneous) atmosphere. [6][7][8][9][10][11][12][13][14][15][16][17] Other types of the randomly inhomogeneous media, in particular the discrete scattering media, while remain out of sight of researchers. Meanwhile, in media of propagation of optical radiation often there are particles of matter which actively participate in light scattering.…”

Generating a Bessel-Gaussian beam for the application in optical engineering

“…Since Bessel beam is the important member of the family of non-diffracting beams, many methods have been proposed to generate this beam 14 15 16 17 18 19 20 21 22 23 . However, because of beam spreading and the loss of energy during propagation, the energy of Bessel beam generated by those methods for long distance propagation is still a problem, such as in quantum and optical communication.…”

“…In this paper, we investigate the validity for generating Bessel-Gaussian (BG) beam by coherent combining technology. Meanwhile, we suggest an idea to form a vortex phase by using discontinuous piston phase which can be used in the generation of many other vortex beams 23 .…”