Aktuelle Publikationen

April 2025

Record length of 2000km weakly-coupled 7-core MCF produced from a single large-scale MCF preform

Sarah Cwalina, Kai Habel, Tobias Tiess, Michael Lorenz, Jong-Won Lee, Maximilian Schmitt, Jimmy E. Beavers, Nicolaj L. Andersen, Andreas C. Samson, Frederik N. Andersen, Qiulin Ma, Martin Böttcher, Kay  Schuster

We present the design and fabrication of more than 2000 km of a 7-core multi-core fiber (MCF) drawn from a single large-scale MCF preform. The fiber was fabricated without any online fiber breaks and exhibits axially excellent geometrical...


April 2025

Designing Citizen Science tools towards increased awareness and participatory policy making for air quality: The Case of COMPAIR

Pavel Kogut, Oliver Schreer, Sylvain Renault, Lieven Raes, Burcu Celikkol, Susie Ruston McAleer, Gert Vervaet, Christos Alexopoulos

The EU-funded project COMPAIR designed advanced monitoring and simulation tools that aggregate data from multiple sources to provide a well-rounded view of air pollution and related challenges e.g. traffic, waste management, energy use. Built-in...


April 2025

Artificial Neural Network With Photonic Reservoir for Multiclass Modulation Format Identification

Guillermo von Hünefeld, Colja Schubert, Ronald Freund, Johannes K. Fischer, Pooyan Safari, Rijil Thomas, Enes Seker, Stephan Suckow, Max Lemme, David Stahl, Peter Bienstman, Mahdi Kaveh, Mahtab Aghaeipour Kolyani, Joseph Hopfmüller

We successfully achieved MFI using a neuromorphic PIC with a photonic reservoir and digital readout, both in a laboratory environment and with commercial network equipment.


April 2025

Resolution and Speed Trade-offs in FMCW LiDAR with MEMS Mirror Scanning and Advanced Signal Processing

Sarah Cwalina, Volker Jungnickel, Patrick Runge, Norman Laske, Avinash Nittur Ramesh, Maria A. Gonzalez-Huici

We address system trade-offs, e.g. between resolution and speed of a coherent scanning LiDAR. We analyze the performance of our real-time FMCW LiDAR prototype with a high-quantumefficiency coherent receiver, two-dimensional...


April 2025

Joint power control, beamforming, and sleep-mode selection for energy-efficient cell-free networks using surrogate machine learning models

Ricky Ooi, Slawomir Stanczak, Renato L. G. Cavalcante, Lorenzo Miretti, Rouaa Diab

In cell-free networks, system throughput is enhanced by allowing more than one access point (AP) to serve each user, which may lead to high energy consumption. To circumvent this, this paper presents a surrogate optimization technique using...


April 2025

Global or local modeling for XGBoost in geospatial studies upon simulated data and German COVID-19 infection forecasting

Ximeng Cheng, Jackie Ma

This research compares the local- and global modeling ways of XGBoost in the geospatial studies. Two experiments based on simulation data and German COVID-19 infection data were conducted to compare the two modeling ways from multiple aspects....


April 2025

SPNeRF: Open Vocabulary 3D Neural Scene Segmentation with Superpoints

Weiwen Hu, Oliver Schreer, Peter Eisert, Ingo Feldmann, Marcus Zepp, Niccolo Parodi

We introduce SPNerf, a NeRF based zero-shot 3D segmentation approach that leverages geometric priors. We integrate geometric primitives derived from 3D scene into NeRF training to produce primitive-wise CLIP features, avoiding the ambiguity of...


April 2025

3D photonic integrated interposer enabling connectivity between multicore fibers and photonic integrated circuits

Madeleine Weigel, Norbert Keil, Martin Schell, Moritz Kleinert, Crispin Zawadzki, David de Felipe Mesquida, Martin Kresse, Tianwen Qian, Jakob Reck, Klara Mihov, Philipp Winklhofer, Lea Flach

A novel 3D photonic integrated interposer is developed for coupling the different layers of Multi-core-fiber (MCF) cores with arrays of conventional 2D electro-absorption modulated lasers (EMLs) and photodetectors (PDs). The 3D photonic...


April 2025

Next Generation XR Systems-Large Language Models Meet Augmented and Virtual Reality

Muhamamd Zeshan Afzal, Peter Eisert, Anna Hilsmann, SK Aziz Ali, Didier Stricker, Daniel Perez-Marcos, Marco Bianchi, Sonia Crottaz-Herbette, Roberto De Ioris, Eleni Mangina, Mirco Sanguineti, Ander Salaberria, Oier Lopez de Lacalle, Aitor García-Pablos, Montse Cuadros

Extended Reality (XR) is evolving rapidly, offering new paradigms for humancomputer interaction. This position paper argues that integrating Large Language Models (LLMs) with XR systems represents a fundamental shift toward more intelligent,...


März 2025

Analysis of Interaction Mechanisms and Intercomparison of Raytracing Tools for Optimizing THz Simulations

Enes Aksoy, Leszek Raschkowski, Alper Schultze, Mikel Celaya-Echarri, Leyre Azpilicueta, Abdolvakil Fazli

This paper compares different raytracing tools in the sub-THz area, to analyze the weight of several different effects, e.g. reflections, diffractions, scattering or atmospheric attenuation, during raytracing simulations for high frequencies. For...


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