Head of Group
Univ.-Prof. Dr. rer. nat. (habil.) Kathy Lüdge
Secretarys office:
Dagmar Böhme
Tel.: +49 (0) 3677 69 3706
Curiebau, Zi. 320
Research
We investigate dynamical instabilities arising from optical feedback, optical injection or mode coupling in lasers. The carrier dynamics in the gain material (e.g. semiconductor nanostructures) plays a central role. Another research topic concerns the extent to which these optical systems can be used for hardware-based machine learning. We use numerical methods to solve coupled differential equations as well as analytical methods of nonlinear dynamics for bifurcation analysis.
Invited talks
- IEEE Workshop on Complexity in Engineering (COMPENG), Florence (virtual), Italy 18/07/22 - 20/07/22 - Title: Delay-based Reservoir Computing: Role of Timescales and Memory for Optimizing Performance
- Emerging Topics in Artificial Intelligence (ETAI), San Diego, US 21-25/08/2022 - Title: Photonic reservoir computing with non-linear memory cells: Interplay between topology, delay and delayed input
- DPG Tagung (SKM Meeting), Regensburg, 4-9/09/2022 - Title: Photonic Reservoir Computing: Analytic insights and possibilities for optimization
- Rank Prize Fund Symposium on 'Neuromorphic Photonics' (6-9 February 2023) - Title: Delay-based Photonic Reservoir Computing : Improving performance via the delay architecture
Publications
https://www.mdpi.com/1099-4300/23/12/1560
L. Jaurigue, E. Robertson, J. Wolters, K. Lüdge
Reservoir Computing with Delayed Input for Fast and Easy Optimisation
Entropy 2021, 23(12), 1560
https://www.nature.com/articles/s41598-021-97757-8
A. Roos, S. Meinecke, K. Lüdge,
Stabilizing Nanolasers via Polarization Lifetime Tuning Sci. Rep. 11, 18558 (2021 )
https://onlinelibrary.wiley.com/doi/10.1002/pssb.202100345
F. Köster, B. Lingnau, A. Krimlowski, P. Hövel, K. Lüdge:
Collective coherence resonance in networks of optical neurons Phys. Status Solidi B 2021, 2100345 (2021)
https://journals.aps.org/pra/abstract/10.1103/PhysRevA.103.043511J. Hausen, B. Herzog, A. Nelde, S. Meinecke, N. Owschimikow, K. Lüdge:Feedback induced locking in semiconductor lasers with strong amplitude-phase coupling Phys. Rev. A 103, 043511 (2021)
https://aip.scitation.org/doi/10.1063/5.0036928
S. Meinecke, K. Lüdge:
Efficient timing jitter simulation for passively mode-locked semiconductor lasers
App. Phys. Lett. 118, 011104 (2021)
https://link.springer.com/article/10.1007%2Fs12559-020-09733-5
F. Köster, D. Ehlert, K. Lüdge:
Limitations of the recall capabilities in delay based reservoir computing systems
Cogn. Comput. 2020, (2020)
Teaching
The Department of Theoretical Physics 2 offers courses in the framework of the course Technical Physics. This concerns the three Bachelor modules:
Theoretical Physics 1 Theoretical Physics 2 Theoretical Physics 3
as well as the Master modules:
Theoretical Physics, Numerics and Simulation Module Physics of Complex Systems.