Generation of extremely high-angle Bessel beams.
Fiche publication
Date publication
mars 2023
Journal
Applied optics
Auteurs
Membres identifiés du Cancéropôle Est :
Dr FROEHLY Luc
Tous les auteurs :
Belloni VV, Froehly L, Billet C, Furfaro L, Courvoisier F
Lien Pubmed
Résumé
We present a setup to generate tightly focused Bessel beams that is composed of a half-ball lens coupled with a relay lens. The system is simple and compact compared to conventional imaging of axicons based on microscope objectives. We experimentally demonstrate the generation of a Bessel beam with a 42° cone angle at 980 nm in air with a typical beam length of 500µ and a central core radius of about 550 nm. We numerically studied the effects of the misalignment of the different optical elements and the range of tilt and shift that are acceptable to obtain a regular Bessel beam.
Référence
Appl Opt. 2023 03 1;62(7):1765-1768