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About

About

José Manuel Baptista graduated in “Electrical and Computer Engineering” from the University of Porto, Porto, Portugal, in 1991, followed by the M.Sc. degree in “Physics of Laser Communications” from the University of Essex, Colchester, U.K., in 1993, and then he obtained the Ph.D. degree in “Electrical and Computer Engineering” from the University of Porto, in 2002.

Currently, he is the Vice-Rector of the University of Madeira for Research and External Relations. He is Associate Professor of the Exact Sciences and Engineering Department of the University of Madeira, Portugal. He is also Senior Researcher in the Optoelectronics and Electronics Systems Unit at INESC Porto, Portugal.

His main scientific areas are the fiber optic sensors, fiber optic communications and fiber optic technologies. He is author of 78 journal publications, 110 communications in national and international conferences, 3 chapter books, 2 patents, reviewer of several scientific publications, and member of various international scientific organizations. He was recently the Leader of the European INTERREG SUDOE Project "ECOAL-MGT - Ecological Management of Coal Waste Piles, SOE3/P2/P714 and he has participated in several national and international funded scientific projects.

Interest
Topics
Details

Details

002
Publications

2017

Optimization of modal sensitivity in nanowire SPR multimode sensor

Authors
Santos, DF; Guerreiro, A; Baptista, JM;

Publication
2017 25TH INTERNATIONAL CONFERENCE ON OPTICAL FIBER SENSORS (OFS)

Abstract
This paper presents a multimode fiber sensor that uses surface plasmon resonance on a metallic wire to measure refractive index. Numerical simulations based on the finite element method reveal the sensor supports several plasmon modes in the wire capable of coupling with the multiples optical fiber modes. Therefore, the sensor configuration creates multiple resonances at different wavelengths, with different values of the loss, sensitivity, among other parameters. Choosing the appropriate mode and filtering out the rest of the modes allows to optimize the sensor performance. In the present work a sensitivity of 5340nm/RIU and resolution of 1.87x10(-6) RIU were found.

2017

SPR optimization using metamaterials in a D-type PCF refractive index sensor

Authors
Santos, DF; Guerreiro, A; Baptista, JM;

Publication
OPTICAL FIBER TECHNOLOGY

Abstract
Using the finite element method (FEM), this paper presents a numerical investigation of the performance analysis of a D-type photonic crystal fiber (D-type PCF) for refractive index sensing, based on surface plasmon resonance (SPR) with a planar structure made out of a metamaterial. COMSOL Multiphysics was used to evaluate the design of the referred refractive index optical fiber sensor, with higher accuracy and considerable economy of time and resources. A study of different metamaterials concentrations conformed by aluminum oxide (Al2O3) and silver (Ag) is carried out. Another structural parameters, which influences the refractive index sensor performance, the thickness of the metamaterial, is also investigated. The results indicate that the use of metamaterials provides a way of improving the performance of SPR sensors on optical fibers and allows to tailor the working parameters of the sensor.

2017

Surface plasmon resonance sensor based on D-type fiber with a gold wire

Authors
Santos, DF; Guerreiro, A; Baptista, JM;

Publication
Optik

Abstract
We propose a refractive index sensor based on surface plasmon resonance (SPR) in a gold wire partially incrusted on the surface of a D-type fiber and in contact with the external medium for increased sensitivity and roughness. The sensor is studied using numerical simulations based on the finite element method (FEM) and is compared with a more conventional D-type fiber SPR where the wire is replaced with a gold film. The numerical work estimates the sensitivity and resolution for different analytic refractive indexes (RI) in the range of 1.30–1.40, for a sensor based on the wavelength interrogation method. The results indicate that the use of the gold wire provides a better sensitivity when compared with the gold film, while supporting multiple peaks in different wavelengths, each with distinct values of sensitivity and resolution. © 2017 Elsevier GmbH

2017

Vibration and Magnetic Field Sensing Using a Long-Period Grating

Authors
Nascimento, IM; Chesini, G; Baptista, JM; Cordeiro, CMB; Jorge, PAS;

Publication
IEEE SENSORS JOURNAL

Abstract
A long-period grating (LPG) written on a standard single mode fiber is investigated as a fiber optic sensor for vibration and magnetic field sensing. It is demonstrated the high sensitivity of the device to applied curvature and the possibility to monitor vibration in a wide range of frequencies from 30 Hz to 2000 Hz. The system was tested using intensity-based interrogation scheme, providing a frequency discrimination of 913 mHz. The goal of these tests was to evaluate the sensor as a passive vibration monitor in the detection of changes in resonant vibration frequencies of support infrastructures can provide information on its degradation. Furthermore, taking advantage of the intrinsic sensitivity to micro strain, alternating magnetic fields were also measured using an intensity-based interrogation scheme by coupling a Terfenol-D magnetostrictive rod to a pre-strained LPG sensor, providing a resolution below 5.61 mu T-rms/root Hz from 1.22 mT(rms) up to 2.53 mT(rms).

2017

ECOAL Project-Delivering Solutions for Integrated Monitoring of Coal-Related Fires Supported on Optical Fiber Sensing Technology

Authors
Ribeiro, J; Viveiros, D; Ferreira, J; Lopez Gil, A; Dominguez Lopez, A; Martins, HF; Perez Herrera, R; Lopez Aldaba, A; Duarte, L; Pinto, A; Martin Lopez, S; Baierl, H; Jamier, R; Rougier, S; Auguste, JL; Teodoro, AC; Goncalves, JA; Esteban, O; Santos, JL; Roy, P; Lopez Amo, M; Gonzalez Herraez, M; Baptista, JM; Flores, D;

Publication
APPLIED SCIENCES-BASEL

Abstract
The combustion of coal wastes resulting from mining is of particular environmental concern, and the importance of proper management involving real-time assessment of their status and identification of probable evolution scenarios is recognized. Continuous monitoring of the combustion temperature and emission levels of certain gases allows for the possibility of planning corrective actions to minimize their negative impact on the surroundings. Optical fiber technology is well suited to this purpose and here we describe the main attributes and results obtained from a fiber optic sensing system projected to gather data on distributed temperature and gas emissions in these harsh environments.

Supervised
thesis

2016

Optical fiber sensors technology for supervision, control and protection of high power systems

Author
Ivo Maciel Nascimento

Institution
UP-FCNA

2016

A numerical approach into new designs for SPR sensors in D-type optical fibers

Author
Diego Felipe de Nóbregra dos Santos

Institution
UMa