| Title: |
From Optimization to Computation : Metaheuristic Control of Optical Fiber Systems and Optical Computing |
| Authors: |
Hary, Mathilde |
| Contributors: |
Tekniikan ja luonnontieteiden tiedekunta - Faculty of Engineering and Natural Sciences; Tampere University |
| Publisher Information: |
Tampere University |
| Publication Year: |
2025 |
| Subject Terms: |
Tekniikan ja luonnontieteiden tohtoriohjelma - Doctoral Programme in Engineering and Natural Sciences |
| Description: |
COTUTELLE-yhteisväitöskirja ; The propagation of optical pulses in fibers exhibits complex nonlinear dynamics, especially in the femtosecond regime, where spectral features are highly sensitive to input parameters. With growing demand for specialized light sources, controlling these features is crucial. However, the interaction between pulse input parameters and resulting features after its nonlinear propagation is non-trivial. Machine learning has emerged as a powerful tool for creating new functionality and improving the performance of many complex systems, without needing precise models. ln this thesis, we combine machine learning algorithms with nonlinear propagation of short pulses in two ways: (i) we leverage advanced numerical algorithms for systematic control and optimization of nonlinear pulse propagation. (ii) We explore the use of optical fibers as platforms for computing. We implement a rapid and flexible genetic algorithm on various fiber systems, demonstrating its capability for self-alignment and drive-resilience. First, we control fiber instabilities from a noise-like pulse cavity, reaching a stable state in just a few minutes. Second, we apply the same principle to the coupling of orbital angular momentum modes to a fiber, stabilizing the system for over a day. Third, we leverage several metaheuristic algorithms for the spectral shaping of supercontinuum generation, controlling up to four wavelengths at the same time. We use simulations to guide the implementation of the experiments. We then compare their performances in order to build a guide for implementing these systems effectively in other complex nonlinear systems. Finally, we use the properties of light to transform our photonic system into a computing platform. We investigate experimentally highly nonlinear fibers to replace traditional electronic architecture by leveraging nonlinear pulse propagation. The results in this thesis compare metaheuristic algorithms for three optical complex systems. We also show the experimental ... |
| Document Type: |
doctoral or postdoctoral thesis |
| File Description: |
fulltext |
| Language: |
English |
| ISSN: |
2490-0028 |
| Relation: |
Tampere University Dissertations - Tampereen yliopiston väitöskirjat; 1222; https://trepo.tuni.fi/handle/10024/226881 |
| Availability: |
https://trepo.tuni.fi/handle/10024/226881 |
| Rights: |
This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited. ; openAccess |
| Accession Number: |
edsbas.AA387C68 |
| Database: |
BASE |