TY  - JOUR
A1  - Otte, Eileen
A1  - Bobkova, Valeria
A1  - Trinschek, Sarah
A1  - Rosales-Guzmán, Carmelo
A1  - Denz, Cornelia
T1  - Single-shot all-digital approach for measuring the orbital angular momentum spectrum of light
T2  - APL Photonics
N2  - Light fields carrying orbital angular momentum (OAM) offer a broad variety of applications in which especially an accurate determination of the respective OAM spectrum, i.e., unraveling the content of OAM by its topological charge ℓ, has become a main subject. Even though various techniques have been proposed to measure the OAM spectrum of such modes, many of them fail if optical vortices have to be considered in perturbed or dynamically changing experimental systems. Here, we put forward a novel technique capable of determining the OAM spectrum of light by a single measurement shot, which specifically applies to those fields that have been distorted. Experimentally, our technique only requires to interfere the perturbed light field with a reference field. From the resulting intensity pattern, the accurate OAM spectrum is determined in an all-digital way. We demonstrate our novel approach by numerical simulations and a proof-of-concept experiment employing a model ball lens as an exemplary disturbing object.
Y1  - 2022
UR  - https://www.hb.fh-muenster.de/opus4/frontdoor/index/index/docId/15182
VL  - 2022
IS  - 7
SP  - 086105
ER  -