Searched for: subject%3A%22Optical%255C+Communication%22
(1 - 15 of 15)
document
Orbons, Sander (author)
Future Very High-Throughput Satellites are foreseen to implement optical ground-to-satellite feeder links to achieve multi-terabit-per-second data rates. Optical links however, are highly susceptible to atmospheric losses caused by turbulence, absorption, and scattering, especially at low elevation angles. Despite prior confirmation of the...
master thesis 2024
document
Ciggaar, Rooderick (author)
The future will see an increase in missions headed for deep space. Advanced payloads will require higher data rates in more efficient spacecraft. Conventional space communication is facilitated through RF technology. Although it is very reliable, doubts arise on its future sustainability because of limited bandwidth, inefficiency and a saturated...
master thesis 2023
document
Maroquin, Serena (author)
IAC will be developing a new Transportable Optical Ground Station (TOGS). It is a telescope that is intended to be used for quantum key distribution in a number of events. Using AO for free-space propagation stabilises the optical signal on a detector significantly, and maximises the received signal by returning near-diffraction limited...
master thesis 2023
document
Badas Aldecocea, M. (author), Piron, P. (author), Bouwmeester, J. (author), Loicq, J.J.D. (author), Kuiper, J.M. (author), Gill, E.K.A. (author)
Growing interest in free-space optical communication, due to the high bandwidth and security provided by these links, has generated the necessity of designing high-performance satellite terminals. In order to develop these terminals, the opto-thermo-mechanical phenomena that appear in the space environment and their effect on optical...
review 2023
document
Pierzyna, Maximilian (author), Saathof, R. (author), Basu, S. (author)
Free-Space Optical Communication (FSOC) links are considered a key technology to support the increasing needs of our connected, data-heavy world, but they are prone to disturbance through atmospheric processes such as optical turbulence. Since turbulence is highly dependent on local topographic and meteorological conditions, modeling optical...
conference paper 2023
document
Chimmalgi, S. (author)
Due to the ever increasing global connectivity, the demand on the fiber-optic communication infrastructure is projected to keep increasing rapidly. A major factor currently limiting transmission capacity is the fiber nonlinearity. Some researchers have suggested the application of nonlinear Fourier transforms to exploit the fiber nonlinearity...
doctoral thesis 2022
document
de Koster, P.B.J. (author), Koch, Jonas (author), Schulz, Olaf (author), Pachnicke, Stephan (author), Wahls, S. (author)
Recently, a nonlinear Fourier transform-based Kerr-nonlinearity identification algorithm was demonstrated for a 1000 km NZDSF link with accuracy of 75%. Here, we demonstrate an accuracy of 99% over 1600 km SSMF. Reasons for improved accuracy are discussed.
conference paper 2022
document
de Vries, Lianne (author)
Optical fibers form the backbone of our global data transmission infrastructure. As demands on global data transmission grow the capacity of these systems needs to be increased. The behaviour of light waves through these optical fibers is described by the Manakov Equation (ME), a system of nonlinear partial differential equations.<br/><br/>The...
master thesis 2021
document
van Tent, Nina (author)
Laser communication offers high data rates and more bandwidth capacity compared to radio but is also advantageous in terms of power and volume. However, the required pointing accuracy and atmospheric influence pose stringent requirements on the system which form the main challenges for this type of communication. This is where laser ranging...
master thesis 2021
document
Spaander, Joshua (author)
Contemporary optical communication terminals are capable of higher data rates, over longer distances for less power compared to traditional radio communication terminals. As of writing, these terminals are almost exclusively single beam compatible. This thesis describes dedicated multi-beam terminal with COTS components. The design study used a...
master thesis 2021
document
Bajaj, V. (author), Chimmalgi, S. (author), Aref, Vahid (author), Wahls, S. (author)
Nonlinear frequency division multiplexing (NFDM) techniques encode information in the so-called nonlinear spectrum which is obtained from the nonlinear Fourier transform (NFT) of a signal. NFDM techniques so far have been applied to the nonlinear Schrödinger equation (NLSE) that models signal propagation in a lossless fiber. Conventionally, the...
journal article 2020
document
de Koster, P.B.J. (author), Wahls, S. (author)
Efficient fiber-optic communication requires precise knowledge of the fiber coefficients, but these often change over time due to factors such as aging or bending. We propose a novel algorithm that identifies the average second-order dispersion and Kerr nonlinearity coefficient of a fiber, without employing any special training signals....
journal article 2020
document
Noppen, Marko (author)
Adaptive optics are widely used to correct the wavefront distortion imposed by atmospheric turbulence. Focal plane phase retrieval from intensity measurements has advantages due to the ease of implementation, potential broader application, less computations, low cost, high system bandwidth, simplified hardware and less calibration. To cope with...
master thesis 2019
document
El Gawhary, O. (author)
The interaction of electromagnetic waves with matter is at the foundation of the way we perceive and explore the world around us. In fact, when a field interacts with an object, signatures on the object's geometry and physical properties are recorded in the resulting scattered field and are transported away from the object, where they can...
journal article 2017
document
Gamet, J. (author), Pandraud, G. (author), Vonsovici, A.P. (author)
journal article 2004
Searched for: subject%3A%22Optical%255C+Communication%22
(1 - 15 of 15)