5 documents found, page 1 of 1
TRIDENT – Technology based impact assessment tool foR sustaInable, transparent ...
Silva, E.; Viegas, D.; Martins, A.; Almeida, J.; Almeida, C.; Neves, B.; Madureira, P.; Wheeler, A. J.; Salavasidis, G.; Phillips, A.; Schaap, A.By creating a dependable, transparent, and cost-effective system for forecasting and ongoing environmental impact monitoring of exploration and exploitation activities in the deep sea, TRIDENT seeks to contribute to the sustainable exploitation of seabed mineral resources. In order to operate autonomously in remote locations under harsh conditions and send real-time data to authorities in charge of granting lic...
Zinc oxide coated optical fiber long period gratings for sensing of volatile or...
Coelho, L.; Viegas, D.; Santos, J. L.; Almeida, José Manuel Marques Martins deThe detection of volatile organic compounds is accomplished with a sensing device based on a long period fiber grating (LPFG) coated with a zinc oxide (ZnO) thin layer with self-temperature compensation. The ZnO coating structure was produced onto the cladding of the fiber by thermal oxidation of a metallic Zn thin film. The morphological characterization of ZnO thin films, grown at the same time on silicon sub...
Zinc oxide coated optical fiber long period gratings for sensing of volatile or...
Coelho, Luís Carlos Costa; Viegas, D.; Santos, J. L.; Almeida, José Manuel Marques Martins deThe detection of volatile organic compounds is accomplished with a sensing device based on a long period fiber grating (LPFG) coated with a zinc oxide (ZnO) thin layer with self-temperature compensation. The ZnO coating structure was produced onto the cladding of the fiber by thermal oxidation of a metallic Zn thin film. The morphological characterization of ZnO thin films, grown at the same time on silicon sub...
Sensing Structure Based on Surface Plasmon Resonance in Chemically Etched Singl...
Coelho, L.; de Almeida, J. M. M. M.; Santos, J. L.; Ferreira, R. A. S.; Andre, P. S.; Viegas, D.Many optical systems based on surface plasmon resonance (SPR) have been developed for working as refractometers, chemical sensors or even for measuring the thickness of metal and dielectric thin films. Sensors based on SPR present very high sensitivity to refractive index (RI) variations when compared to the traditional RI sensors. However, these kinds of systems are usually large, expensive and therefore canno...
Sensing Structure based on Surface Plasmonic Resonance in Single Mode Optical F...
Coelho, L.; Almeida, J. M.; Santos, J. L.; Ferreira, R. A. S.; Andre, P. S.; Viegas, D.Many optical systems based on Surface Plasmon Resonance (SPR) have been developed for work as refractometers, chemical sensors or even for measure the thickness of metal and dielectric thin films. These kinds of systems are usually large, expensive and cannot be used for remote sensing. Optical fiber sensors based on SPR has been widely studied for the last 20 years with several configurations mostly using mult...