1.
Appl Opt
; 59(6): 1553-1557, 2020 Feb 20.
Article
in English
| MEDLINE
| ID: mdl-32225655
ABSTRACT
Determination of orbital angular momentum of optical vortex beams has attracted the attention of many researchers over the last few years. For some applications, it is convenient to use a partially coherent vortex beam because of its robustness. In this work, we developed a method to measure the topological charge of a partially coherent vortex beam. Our method relies simply in the measurement of the minimum radius of a zero contour of the modulus of the cross-correlation function and in the measurement of the full width at half maximum of its central spot.