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The transmission of the high data rate and information over the optical fiber is restricted by various dispersion phenomenon which further results into intersymbol interference (ISI). This article proposes two different methodologies for optical fiber deformation aiding vibration monitoring one using the pin diode as a photo-detector device and another manifesting the avalanche photo-detector. The novelty of this article lies in optical signal conversion using photo-detector processing followed by low pass Gaussian filter in order to reduce the extra contortion. This work is approaching electronic dispersion compensation technique (EDC) for compensation of chromatic dispersion at two distinct bit rates of 25 and 30 Gbps over 120 km of single mode fiber. Both the diodes have tested for theory performance using factors like Q-factor, bit error rate and eye height. It is found that pin diode is exhibiting a quality factor of 67.150 and 40.5944 at 25 and 30 Gbps, respectively. When avalanche pin diode is used at the same data rates, quality factor of 73.0240 and 43.3523 are obtained, respectively. Hence, use of avalanche photodiode at high bit rates is utilized and the simulations showed the optimum photo-diode for efficacious dispersion compensation at such a long transmission distance.

Coupling characteristics between a single mode fiber (SMF) and a waveguide embedded in a glass chip via a graded index fiber (GIF) tip are investigated at a wavelength of 976 nm. The GIF tips comprise a coreless fiber section and a GIF section. A depressed cladding waveguide in a ZBLAN glass chip with a core diameter of 35 μm is coupled with GIF tips that have a range of coreless fiber and GIF lengths. An experimental coupling efficiency as high as 88% is obtained while a numerical simulation predicts 92.9% for the same GIF tip configuration. Since it is measured in the presence of Fresnel reflection, it can be further improved by anti-reflection coating. Additionally, it is demonstrated that a gap can be introduced between the chip waveguide and the GIF tip while maintaining the high coupling efficiency, thus allowing a thin planar optical component to be inserted. The results presented here will enable miniaturization and simplification of photonic chips with integrated waveguides by replacing bulk coupling lenses with integrated optical fibers.

Power over fiber (PoF) with sleep mode operation in centralized radio access networks (C-RAN) of low power Remote Radio Heads (RRH) helps to reduce power consumption. This proposal includes bundles of single mode optical fibers (SMF) as part of the 5G C-RAN front-haul solution for providing control on power consumption by selectively activating some parts of the RRH. We experimentally demonstrate a PoF system based on 14.43 km of SMF feed by 2.24 W giving 226 mW electrical power at the RRH for control, battery charge, load operation and communication purposes. A bidirectional control channel is integrated in the central office and the RRH for providing the capability of entering in sleep mode operation and to provide information about the status of the battery and sensing elements at RRH. The optical data uplink/downlink operates over separate optical fibers shared by various RRHs and achieves low power consumption below 33 mW with low data rates. The measured PV cells conversion efficiency is above 30%. The RRH has two sleep modes of operation with a minimum power consumption of 5.8 mW. 2021. This work was supported in part by the Spanish Ministerio de Ciencia, Innovación y Universidades, Madrid Government (Comunidad de Madrid-Spain) and H2020 European Union programme under Grants RTI2018-094669-B-C32, Y2018/EMT-4892, P2018/NMT-4326, and 5G PPP Bluespace Project Grant 762055, respectively

Como los parámetros de los que depende el funcionamiento de un pirómetro son múltiples y no es posible tratar todas las casuísticas por la complejidad que supone y la extensión de las mismas, este Trabajo de Fin de Grado tiene como objetivos a desarrollar los siguientes: Adaptación de las simulaciones para el nuevo fotodetector utilizado por el GDAF, haciendo un pequeño análisis del efecto que tiene utilizar fotodetectores de distintos fabricantes manteniendo el resto de parámetros constantes. Estudiar en qué rango de temperatura los distintos tipos de fibras trabajan de forma más óptima, teniendo en cuenta si es multimodo (Multi Mode Fiber, MMF) o monomodo (Single Mode Fiber, SMF) así como el diámetro de la misma. Analizar la dependencia de las medidas con el tamaño del objeto cuya temperatura se desea medir y/o con la distancia a la que se encuentra el mismo. Optimizar el programa en lo posible para que sea eficaz y fácil de utilizar en distintas casuísticas. Realizar un estudio de cómo afectan las tolerancias de los distintos componentes al sistema. Ingeniería en Tecnologías Industriales (Plan 2010)