TY - JOUR A1 - Bobkova, Valeriia A1 - Trinschek, Sarah A1 - Otte, Eileen A1 - Denz, Cornelia T1 - Analyzing light-structuring features of droplet lenses on liquid-repelling surfaces JF - Optics Express Y1 - 2022 U6 - http://dx.doi.org/10.1364/OE.444777 VL - 30 IS - 4 SP - 5937 EP - 5952 ER - 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 JF - 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 U6 - http://dx.doi.org/10.1063/5.0086536 VL - 2022 IS - 7 SP - 086105 ER -