Generation of J0 Bessel Beams with controlled spatial coherence features

TL;DR

This paper presents a novel method for generating J0 Bessel beams with tunable spatial coherence by using diffraction from discrete sources on an annulus, supported by theoretical and experimental validation.

Contribution

It introduces a new approach to control the spatial coherence of J0 Bessel beams through discrete source arrangements and analyzes the coherence properties as the number of sources varies.

Findings

J0 Bessel beam is a limit case as the number of source points increases.

The complex degree of coherence depends on the number of source points.

Experimental results confirm the theoretical predictions.

Abstract

An alternative method to generate J0 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, J0 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.