Novel multicore optical fibers for signal distribution and processing
- Autores: Mario Ureña Gisbert
- Directores de la Tesis: Ivana Gasulla Mestre (dir. tes.), Sergi García Cortijo (dir. tes.), José Capmany (tut. tes.)
- Lectura: En la Universitat Politècnica de València ( España ) en 2023
- Idioma: inglés
- Tribunal Calificador de la Tesis: David Marpaung (presid.), Salvador Sales Maicas (secret.), Georg Rademacher (voc.)
- Programa de doctorado: Programa de Doctorado en Telecomunicación por la Universitat Politècnica de València
- Materias:
- Enlaces
- Tesis en acceso abierto en: RiuNet
- Resumen
Space-division multiplexing fibers emerged in the last decade as a solution to the capacity bottleneck in single-mode optical fiber communication networks. They utilize space, the last multiplexing technique in optical communications, to increase the total capacity in digital communications whilst reducing space needs. Multicore fibers, a type of space-division multiplexing fibers comprised of multiple individual cores within the same cladding, are promising for long-reach communications because of their immediate compatibility with current fiber networks. Moreover, multicore fibers have raised interest in other fields of application such as data-center interconnects, quantum communications, radio access networks and Microwave Photonics. Apart from that, these fibers exhibit great potential not only for signal distribution but also for signal processing. Signal processing functionalities can benefit significantly from using these fibers in terms of compactness and weight, while assuring broadband versatility, reconfigurability, and performance stability.
In this Thesis, we propose the exploitation of the inherent parallelism found in multicore fibers to implement distributed signal processing for optical and microwave signals. First, we study the realization of a key optical component in Microwave Photonics signal processing, the sampled true-time delay line, with heterogeneous multicore fibers. This comprises the performance validation of a previously fabricated heterogeneous 7-core fiber, the experimental demonstration of microwave signal processing functionalities including signal filtering, optical beamforming, and arbitrary waveform generation, and the design and fabrication of a heterogeneous 19-core fiber that behaves as a tunable true-time delay line. This fiber was fabricated by scaling down 3 different preforms, each with a specific refractive index profile, with a different ratio to obtain cores with determined propagation characteristics. Lastly, we propose different custom heterogeneous multicore fiber designs for novel optical signal distribution and processing applications, including quantum key distribution, parallel chromatic dispersion compensation and parallel temporal Talbot effects.
