Development and application of photonic technologies for industry 4.0

Identifier:  TDX:3304

Handle: https://hdl.handle.net/20.500.11797/TDX3304

Authors:  Llamas Martínez, Víctor

Abstract:
In this thesis, photonic technologies such as lasers, sensors and detectors has been developed in order to provide solutions to Industry 4.0. Special attention has been paid to waveguides inscribed in crystals thanks to the femtosecond-direct laser writing technique, with which microchip lasers in the range of ~ 2 m have been developed, ideal for use in medicine. The lasered guides have different geometries, impossible to achieve by other methods, in order to optimize parameters such as the efficiency, the laser threshold or the maximum pump power. On the other hand, photonic sensors have been created by using waveguides with different geometries and characteristics. These are capable of confining light inside and making it interact with different liquids, being able to detect changes in its refractive index and thereby determine the presence of impurities. Fabry-Perot evanescence and interferometry processes have been studied. Finally, photonic sensors have been developed, adapted to the needs of each production chain. With them it has been possible to create control systems that offer an efficient, innovative and economically competitive service. The developed sensors technology was applied for innovative concepts for industry 4.0. This work emphasizes the needed of the industry for real and inline/online monitoring, machine learning systems for a better green manufacturing.