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  - 
TY  - JOUR
A1  - Homrighausen, Jonas
A1  - Horsthemke, Ludwig
A1  - Pogorzelski, Jens
A1  - Trinschek, Sarah
A1  - Glösekötter, Peter
A1  - Gregor, Markus
T1  - Edge-Machine-Learning-Assisted Robust Magnetometer Based on Randomly Oriented NV-Ensembles in Diamond
JF  - Sensors
N2  - Quantum magnetometry based on optically detected magnetic resonance (ODMR) of nitrogen vacancy centers in nano- or micro-diamonds is a promising technology for precise magnetic-field sensors. Here, we propose a new, low-cost and stand-alone sensor setup that employs machine learning on an embedded device, so-called edge machine learning. We train an artificial neural network with data acquired from a continuous-wave ODMR setup and subsequently use this pre-trained network on the sensor device to deduce the magnitude of the magnetic field from recorded ODMR spectra. In our proposed sensor setup, a low-cost and low-power ESP32 microcontroller development board is employed to control data recording and perform inference of the network. In a proof-of-concept study, we show that the setup is capable of measuring magnetic fields with high precision and has the potential to enable robust and accessible sensor applications with a wide measuring range.
Y1  - 2023
UR  - https://www.mdpi.com/1424-8220/23/3/1119
U6  - http://dx.doi.org/10.3390/s23031119
VL  - 23
IS  - 3
ER  - 
TY  - JOUR
A1  - Kiel, Frederik
A1  - Trinschek, Sarah
A1  - Kuchmizhak, Aleksandr
A1  - Gurevich, Evgeny
T1  - Colouration of diamond surfaces by laser-induced periodic surface structuring
JF  - Optics & Laser Technology
Y1  - 2024
U6  - http://dx.doi.org/10.1016/j.optlastec.2023.109882
IS  - 168
SP  - 109882
ER  -