A5024743438- Optical Network Technologies
- Advanced Photonic Communication Systems
- Advanced Optical Network Technologies
- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- Algorithms and Data Compression
- Religion, Theology, and Education
- Physics and Engineering Research Articles
- Wildlife Ecology and Conservation
- Avian ecology and behavior
- Public Administration and Political Analysis
- Law and Political Science
- German Literature and Culture Studies
- Religion, Theology, History, Judaism, Christianity
- Advanced Fiber Laser Technologies
- Optical Wireless Communication Technologies
- DNA and Biological Computing
- PAPR reduction in OFDM
- Privacy-Preserving Technologies in Data
- Quantum Dots Synthesis And Properties
- Autonomous Vehicle Technology and Safety
- Error Correcting Code Techniques
- Software-Defined Networks and 5G
- Network Packet Processing and Optimization
- Chalcogenide Semiconductor Thin Films
Fraunhofer Institute for Telecommunications, Heinrich Hertz Institute
2016-2025
Karlsruhe Institute of Technology
2016-2024
Stanford University
2024
LMU Klinikum
2024
Ludwig-Maximilians-Universität München
2024
Gesellschaft zur Förderung angewandter Informatik
2024
University of Regensburg
2018-2023
Regensburg University of Applied Sciences
2019-2022
Georg Simon Ohm University of Applied Sciences Nuremberg
2021
Victoria University of Wellington
2020
Quantum Communication is the art of transferring an unknown quantum state from one location, Alice, to a distant one, Bob. This non-trivial task because no-cloning theorem which prevents merely using only classical means.
Fiber-optic multi-band transmission (MBT) aims at exploiting the low-loss spectral windows of single-mode fibers (SMFs) for data transport, expanding by ~11× available bandwidth C-band line systems and ~5× C+L-band systems'. MBT offers a high potential cost-efficient throughput upgrades optical networks, even in absence dark-fibers, as it utilizes more efficiently existing infrastructures. This represents main advantage compared to approaches such multi-mode/-core or spatial division...
This paper reports the work on next generation transponders for optical networks carried out within last years.A general architecture supporting super-channels (i.e., connection composed of several adjacent sub-carriers) and slice-ability sub-carriers grouped in a number independent with different destinations) is presented.Several transponder implementations transmission techniques are considered, highlighting advantages, economics complexity.Discussions include electronics, components,...
In this work we detail the strategies adopted in European research project IDEALIST to overcome predicted data plane capacity crunch optical networks. order for core and metropolitan telecommunication systems be able catch up with Internet traffic, which keeps growing exponentially, exploit elastic networks paradigm its astounding characteristics: flexible bandwidth allocation reach tailoring through adaptive line rate, modulation formats, spectral efficiency. We emphasize novelties stemming...
We present a linear and nonlinear digital pre-distortion (DPD) tailored to the components of an optical transmitter. The DPD concept uses models transmitter devices, which are obtained from direct component measurements. While digital-to-analog converter driver amplifier modeled jointly by Volterra series, modulator is independently as Wiener system. This allows for block-wise compensation Hammerstein system electrical second series. In simulations extensive experiments, performance our...
In the evolution of optical networks, spectral efficiency (SE) enhancement has been most cost-efficient and thus main driver for capacity increase decades. As a result, development transport systems focused on <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$C$ </tex-math></inline-formula> - notation="LaTeX">$L$ -bands, where silica fiber exhibits lowest attenuation, erbium-doped amplifiers provide an...
Machine Learning (ML) is considered a promising tool to aid and accelerate diagnosis in various medical areas, including neuroimaging. However, its success set back by the lack of large-scale public datasets. Indeed, institutions possess large amount data; however, open-sourcing prevented legal requirements protect patient's privacy. Federated (FL) viable alternative that can overcome this issue. This work proposes training an ML model for Alzheimer's Disease (AD) detection based on...
This paper reports on a field trial in robotic manufacturing cell. Channel measurements and transmission experiments were conducted, assisting the development of light-emitting diode-based optical wireless communication (OWC) system tailored for needs industrial applications. These are moderate data rates, reliability, low latency. Since dedicated radio spectrum is hardly available, usage light an interesting alternative. Due to its spatial confinement, OWC links provide enhanced security...
In this invited contribution, we discuss technology options for bandwidth-variable transceivers which are key components the realization of flexible software-defined optical networking. Bandwidth-variable enable software-controlled adaptation physical layer parameters such as transmitted bit rate, spectral efficiency and transparent reach according to traffic demands at hand. particular, focus on recent advances in four-dimensional modulation formats format data-aided digital signal...
Multiband transmission is a valid option to significantly increase fiber capacity and efficiently utilize the available deployed optical infrastructure. In this contribution, we evaluate its challenges possible implementation.
We experimentally demonstrate the use of data-aided digital signal processing for format-flexible coherent reception different 28-GBd PDM and 4D modulated signals in WDM transmission experiments over up to 7680 km SSMF by using same resource-efficient algorithms equalization all formats. Stable regular performance nonlinear regime is confirmed.
We experimentally investigate Kerr nonlinearity mitigation of a 28-GBd polarization-multiplexed 16-QAM signal in five-channel 50-GHz spaced wavelength-division multiplexing (WDM) system. Optical phase conjugation (OPC) employing the mid-link spectral inversion technique is implemented by using dual-pump polarization-independent fiber-optic parametric amplifier and compared to digital backpropagation (DBP) compensation over up 800-km dispersion-managed link. In single-channel case, use DBP...
A successful migration from current C-band based optical networks to a multiband scenario primarily depends on the development of solutions that can reliably measure physical properties links over broad spectral transmission windows.Additionally, these must be capable delivering wavelength-dependent and spatially-resolved indicators empower network operators identify faults before they lead severe service disruptions.Recently, exploitation receiver digital signal processing as tool for...
We present a serial 10.2-Tb/s transmission-system using 1.28-TBd RZ-16-QAM signal, polarization multiplexing and ultra-fast coherent demultiplexing. Considering FEC-overhead, we achieve record error-free net data rate of 9.5-Tb/s transmission over 29-km.
Optical wideband communication systems aim at transmitting over several, if not all, of the low-loss windows single-mode fibre, i.e. O-, E-, S-, C-, and L-band. Recently, there has been a clear trend in industry to support additional bands beyond C-band. While C+L-band solutions are close commercialization first products emerging, research focus is shifting supporting also S-band and, finally, whole O- L-band (resulting total transmission bandwidth 365 nm). This contribution highlights...
As the use of optical wireless communication (OWC) in industrial production environments is gaining interest, it necessary to consider application's challenging requirements with respect reliability and low latency. In this paper, we first analyze factors limiting coverage OWC. We discuss increased drive signal powers an optional nonlinear post-equalizer, which improves signal-to-noise ratio by additional 3.5 dB. Further, spanning a multiple-input multiple-output (MIMO) channel exploiting...
Abstract Spatially resolved measurements of kesterite absorber layer uniformity were made using single wavelength photocurrent and energy dispersive X‐ray (EDX) measurements. The p‐type layers consisting nominally Cu 2 ZnSnS 4 (CZTS) synthesised by sequentially electrodepositing Cu, Sn, Zn from unstirred baths subsequently annealing the stacked pre‐cursors in a sulphur containing atmosphere. EDX showed samples to have deviations their photo‐response, thickness, composition over scale few...
In this paper, we discuss the state-of-the-art of components and technology to enable multi-band transmission over single mode fibers (SMFs). A full overview on most relevant challenges is provided.