Nonlinear Effects in Multi-Core Fibers
nonlinearity, optical communications, mcf, multicore fibers
Space-division multiplexing (SDM), which consists in exploiting multimode fibers (MMFs) or multicore fibers (MCFs) instead of single mode ones, is one of the future optical communications architectures to increase data rates and network planning flexibility. The nonlinear properties of MCFs are of primary interest in assessing the usefulness of SDM against the current network. With this thesis, the student has the chance to work on a state-of-the-art topic in the field of optical communication systems, and progress quickly thanks to a tight (if desired) supervision. Would you be curious to know more about it? If so, just get in touch with me at email@example.com (personal page https://www.ce.cit.tum.de/lnt/mitarbeiter/doktoranden/carniello/).
-some knowledge on optical communications systems (e.g., Optical Communication Systems or Simulation of Optical Communication Systems Lab)
-some knowledge about communications engineering topics
See https://www.ce.cit.tum.de/lnt/mitarbeiter/doktoranden/carniello/ for more info on the supervisor.
Strong Coupling Multimode Fibers
Multimode fibers, Space-division multiplexing
Space-division multiplexing (SDM), which consists in exploiting multimode (MMF) or multicore fibers instead of single mode ones, is one of the future architectures to increase data rates and network planning flexibility. A desired working condition for SDM is the so called strong-coupling linear regime, which is however not intrinsically achievable in common MMFs. With this topic, the student has the chance to investigate if it would be achievable with some new design. If you are curious about it, just send a mail to firstname.lastname@example.org.
Basics of Optical Communication Systems (see https://www.ce.cit.tum.de/en/lnt/teaching/lectures/optical-communication-systems/)
Hollow Core Fibers for Optical Communication Systems
Optical Communications, Fibers
In order to increase the capacity of the current optical networks, new transmission architectures are under investigation. Hollow-core fibers are a new technology, which promises, among the others, to have reduced losses and extremely low nonlinear effects. New propagation impairments, which are still under study, would arise compared to the well-known single-mode fibers (SMFs). Yet, their employment in the field of optical communications seems likely to bring about a breakthrough over the current SMF-based solutions.
The student is required to compare ste system-level benefits of hollow-core fiber based systems against wideband frequency-division multiplexing (FDM) systems based on SMFs (or also on multi-core fibers), highlighting the most likely application scenarios, see .
A further elective task is to provide an overview on the design and modeling of hollow-core fibers, see .
 E. N. Fokua et al., ``Loss in hollow-core optical fibers: mechanisms, scaling rules, and limits'', 2023
 P. Poggiolini, F. Poletti, ``Opportunities and Challenges for Long-Distance Transmission in Hollow-Core Fibres'', 2022
Bases in optical communication systems and, possibly, in guided mode propagation.