Publications

Publications by CAP

2018

Low-cost interrogation system for long period fiber gratings as sensing devices

Authors
Dos Santos P.S.S.; Jorge P.A.S.; De Almeida J.M.M.M.; Coelho L.;

Publication
Optics InfoBase Conference Papers

Abstract
A system with fiber laser diodes and photodetector replaces the usual bulky and expensive systems for characterization of long period fiber gratings and high correlation is achieved when measuring refractive index, temperature and curvature.

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2018

Optical fiber sensor Mach-Zehnder interferometer based on TiO<inf>2</inf> coated long period fiber grating

Authors
Vasconcelos H.; De Almeida J.M.M.M.; Jorge P.A.S.; Coelho L.;

Publication
Optics InfoBase Conference Papers

Abstract
The wavelength sensitivity and spectral resolution of Mach-Zehnder fiber interferometers based on uncoated and TiO2 coated LPFGs is presented and compared with TiO2 coated single LPFGs optical fiber sensors.

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2018

Plasmonic optical fiber sensor based on double step growth of gold nano-islands

Authors
De Almeida J.M.M.M.; Vasconcelos H.; Jorge P.A.S.; Coelho L.;

Publication
Optics InfoBase Conference Papers

Abstract
Refractive index sensors based on localized surface plasmon resonance are presented through the fabrication of gold nano-islands on top of optical fiber tips. Repeated dewetting process led to an increase of sensitivity from 60 to 186nm/RIU.

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2018

Positioning, Navigation and Awareness of the VAMOS! Underwater Robotic Mining System

Authors
Almeida, J; Martins, A; Almeida, C; Dias, A; Matias, B; Ferreira, A; Jorge, P; Martins, R; Bleier, M; Nuchter, A; Pidgeon, J; Kapusniak, S; Silva, E;

Publication
2018 IEEE/RSJ INTERNATIONAL CONFERENCE ON INTELLIGENT ROBOTS AND SYSTEMS (IROS)

Abstract
This paper presents the positioning, navigation and awareness (PNA) system developed for the Underwater Robotic Mining System of the VAMOS! project [1]. It describes the main components of the VAMOS! system, the PNA sensors in each of those components, the global architecture of the PNA system, and its main subsystems: Position and Navigation, Real-time Mine Modeling, 3D Virtual reality HMI and Real-time grade system. General results and lessons learn during the first mining field trial in Lee Moor, Devon, UK during the months of September and October 2017 are presented.

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2018

Optical Fiber Link Failure Prediction System Based on Long-Period Fiber Grating Mechanical Sensor

Authors
Sotomaior, N; Teixeira, B; Azevedo, J; Caldas, P; Rego, G; Pinto, P;

Publication
Proceedings

Abstract
High data rate optical fiber links are usually deployed in core IP networks to transport bulky [...]

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2018

Measurement Thermal Conductivity of Water using a All-Fiber Sensor Based on a Metallic Coated Hybrid LPG-FBG Structure

Authors
E.Silva, G; Caldas, P; Santos, JL; Santos, JC;

Publication
26th International Conference on Optical Fiber Sensors

Abstract