From amorphous speckle pattern to reconfigurable Bessel beam via wavefront shaping

TL;DR

This paper presents a novel method to generate reconfigurable Bessel beams from amorphous speckle patterns using wavefront shaping with a spatial light modulator, enabling non-diffracting beams through disordered media.

Contribution

It introduces a system that creates reconfigurable Bessel beams from speckle patterns via adaptive optimization, expanding beam control through scattering media.

Findings

Successfully generates Bessel beams from speckle patterns.

Enables beam reconfiguration at user-defined positions.

Maintains non-diffracting properties through scattering media.

Abstract

Bessel beams are non-diffracting light structures, which can be produced with simple tabletop optical elements such as axicon lenses or ring spatial filters and coherent laser beams. One of their main characteristic is that Bessel beams maintain their spatial characteristics after meters of propagation. In this paper we demonstrate a system and method for generating Bessel beams from amorphous speckle patterns, exploiting adaptive optimization by a spatial light modulator. These speckles are generated by light modes transmitted through a scattering curtain and selected by a ring shaped filter. With the proposed strategy it is possible to produce at user defined positions, reconfigurable, non-diffracting Bessel beams through a disordered medium.