This page has only limited features, please log in for full access.

Unclaimed
J. M. Baptista
Faculty of Exact Sciences and Engineering, University of Madeira, 9020-105 Funchal, Portugal

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

Graduated in “Electrical and Computer Engineering” from the University of Porto, Portugal, in 1991, followed by the M.Sc. degree in “Physics of Laser Communications” from the University of Essex, U.K., in 1993, and then he obtained the Ph.D. degree in “Electrical and Computer Engineering” from the University of Porto, Portugal, in 2002. He is Associate Professor with Aggregation in the Faculty of the Exact Sciences and Engineering of the University of Madeira, Portugal, and he is also Senior Researcher in the Center of Applied Photonics at INESC TEC, Portugal. His main scientific areas are fiber optic sensors, fiber optic communications and fiber optic technologies. He is the author of more than 80 journal publications, 114 communications in national and international conferences, 4 book chapters, reviewer of several scientific publications, a senior member of IEEE – Institute of Electrical and Electronics Engineers – and a member of various international scientific organizations.

Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Journal article
Published: 24 May 2021 in Photonics
Reads 0
Downloads 0

This paper proposes a scheme to determine the optical dispersion properties of a medium using multiple localized surface plasmon resonances (SPR) in a D-shaped photonic crystal fiber (PCF) whose flat surface is covered by three adjacent gold layers of different thicknesses. Using computational simulations, we show how to customize plasmon resonances at different wavelengths, thus allowing for obtaining the second-order dispersion. The central aspect of this sensing configuration is to balance miniaturization with low coupling between the different localized plasmon modes in adjacent metallic nanostructures. The determination of the optical dispersion over a large spectral range provides information on the concentration of different constituents of a medium, which is of paramount importance when monitoring media with time-varying concentrations, such as fluidic media.

ACS Style

Markos Cardoso; Anderson Silva; Amanda Romeiro; M. Giraldi; João Costa; José Santos; José Baptista; Ariel Guerreiro. Second-Order Dispersion Sensor Based on Multi-Plasmonic Surface Resonances in D-Shaped Photonic Crystal Fibers. Photonics 2021, 8, 181 .

AMA Style

Markos Cardoso, Anderson Silva, Amanda Romeiro, M. Giraldi, João Costa, José Santos, José Baptista, Ariel Guerreiro. Second-Order Dispersion Sensor Based on Multi-Plasmonic Surface Resonances in D-Shaped Photonic Crystal Fibers. Photonics. 2021; 8 (6):181.

Chicago/Turabian Style

Markos Cardoso; Anderson Silva; Amanda Romeiro; M. Giraldi; João Costa; José Santos; José Baptista; Ariel Guerreiro. 2021. "Second-Order Dispersion Sensor Based on Multi-Plasmonic Surface Resonances in D-Shaped Photonic Crystal Fibers." Photonics 8, no. 6: 181.

Letter
Published: 22 January 2021 in Sensors
Reads 0
Downloads 0

Optical fiber gratings have long shown their sensing capabilities. One of the main challenges, however, is the interrogation method applied, since typical systems tend to use broadband light sources with optical spectrum analyzers, laser scanning units or CCD (Charged Coupled Device) spectrometers. The following paper presents the development of an interrogation system, which explores the temperature response of a multimode laser diode, in order to interrogate long period fiber gratings. By performing a spectral sweep along one of its rejection bands, a discrete attenuation spectrum is created. Through a curve fitting technique, the original spectrum is restored. The built unit, while presenting a substantially reduced cost compared with typical interrogation systems, is capable of interrogating along a 10 nm window with measurement errors reaching minimum values as low as 0.4 nm, regarding the grating central wavelength, and 0.4 dB for its attenuation. Given its low cost and reduced dimensions, the developed system shows potential for slow-changing field applications.

ACS Style

Luís Henrique Silva; Paulo Santos; Luís C. C. Coelho; Pedro Jorge; José Manuel Baptista. Development of a Long Period Fiber Grating Interrogation System Using A Multimode Laser Diode. Sensors 2021, 21, 749 .

AMA Style

Luís Henrique Silva, Paulo Santos, Luís C. C. Coelho, Pedro Jorge, José Manuel Baptista. Development of a Long Period Fiber Grating Interrogation System Using A Multimode Laser Diode. Sensors. 2021; 21 (3):749.

Chicago/Turabian Style

Luís Henrique Silva; Paulo Santos; Luís C. C. Coelho; Pedro Jorge; José Manuel Baptista. 2021. "Development of a Long Period Fiber Grating Interrogation System Using A Multimode Laser Diode." Sensors 21, no. 3: 749.

Conference paper
Published: 03 October 2019 in Fourth International Conference on Applications of Optics and Photonics
Reads 0
Downloads 0

This paper explores and compares three different plasmonic optical fibre sensor configurations, based on D-type and suspended core fibres combined with metallic nanowires, and investigates how their different geometrical parameters can affect the coupling between the guided optical mode supported by fibres and the localized plasmonic modes, and how that ultimately results in improved sensor performance. Fibre optical sensors based on plasmonic resonances with metallic nanostructures have revolutionized the field of optical sensing because they have permitted to obtain sharper and fine-tuned resonances with higher sensitivity. The essence for exploring the properties of localized plasmonic modes and their coupling with the optical guided mode depends not only on the choice of the materials employed in the device, but also on the geometry of the different components and their relative position, which ultimately determines the spatial distributions of optical power of the different modes and consequently their overlap and coupling. In this work, we use numerical simulations based on finite element methods to demonstrate the importance of shaping the features of the guided optical mode to promote the coupling with the localized modes, in the two types of fibres considered. The results clarify some of the fundamental aspects behind the operation of these devices and provide novel proposals for enhanced refractive index sensors.

ACS Style

Diego Santos; Ariel Guerreiro; Jose Baptista. Enhancing nanoplasmonic sensing with metallic nanowires: from D-type to suspended core fibres. Fourth International Conference on Applications of Optics and Photonics 2019, 11207, 1120711 .

AMA Style

Diego Santos, Ariel Guerreiro, Jose Baptista. Enhancing nanoplasmonic sensing with metallic nanowires: from D-type to suspended core fibres. Fourth International Conference on Applications of Optics and Photonics. 2019; 11207 ():1120711.

Chicago/Turabian Style

Diego Santos; Ariel Guerreiro; Jose Baptista. 2019. "Enhancing nanoplasmonic sensing with metallic nanowires: from D-type to suspended core fibres." Fourth International Conference on Applications of Optics and Photonics 11207, no. : 1120711.

Conference paper
Published: 03 October 2019 in Fourth International Conference on Applications of Optics and Photonics
Reads 0
Downloads 0

We present the design, fabrication and optical characterization of functional metamaterials for optical sensing of Hydrogen based on inexpensive self-assembly processes of metallic nanowires integrated in nanoporous alumina templates[37-42]. The optical properties of these materials strongly depend on the environmental concentration or partial pressure of hydrogen and can be used to develop fully optical sensors that reduce the danger of explosion. Optical metamaterials are artificial media, usually combining metallic and dielectric sub-wavelength structures, that exhibit optical properties that cannot be found in naturally occurring materials. Among these, functional metamaterials offer the added possibility of altering or controlling these properties externally after fabrication, in our case by contact with a hydrogen rich atmosphere. This dependency can be used to design[43-45] and develop optical sensors that respond to this gas or to chemical compounds that contain or release hydrogen. In this paper we present some designs for hydrogen functional metamaterials and discuss the main parameters relevant in the optimization of their response.

ACS Style

Ariel Guerreiro; Arlete Apolinário; Armandina Lopes; Aurelio Hierro-Rodriguez; Gerardo Aguilar; Jose Baptista; Nuno Azevedo Silva; Orlando Frazão; Paula Quitério; Pedro Jorge; Pedro Rodrigues; Suellen Silveira Moraes; Susana Silva; Tiago D. Ferreira; Jose Luis Santos; João Pedro Esteves de Araújo. Functional metamaterials for optical sensing of hydrogen. Fourth International Conference on Applications of Optics and Photonics 2019, 11207, 1120724 .

AMA Style

Ariel Guerreiro, Arlete Apolinário, Armandina Lopes, Aurelio Hierro-Rodriguez, Gerardo Aguilar, Jose Baptista, Nuno Azevedo Silva, Orlando Frazão, Paula Quitério, Pedro Jorge, Pedro Rodrigues, Suellen Silveira Moraes, Susana Silva, Tiago D. Ferreira, Jose Luis Santos, João Pedro Esteves de Araújo. Functional metamaterials for optical sensing of hydrogen. Fourth International Conference on Applications of Optics and Photonics. 2019; 11207 ():1120724.

Chicago/Turabian Style

Ariel Guerreiro; Arlete Apolinário; Armandina Lopes; Aurelio Hierro-Rodriguez; Gerardo Aguilar; Jose Baptista; Nuno Azevedo Silva; Orlando Frazão; Paula Quitério; Pedro Jorge; Pedro Rodrigues; Suellen Silveira Moraes; Susana Silva; Tiago D. Ferreira; Jose Luis Santos; João Pedro Esteves de Araújo. 2019. "Functional metamaterials for optical sensing of hydrogen." Fourth International Conference on Applications of Optics and Photonics 11207, no. : 1120724.

Journal article
Published: 13 September 2019 in Photonics
Reads 0
Downloads 0

The introduction of metallic nanostructures in optical fibers has revolutionized the field of plasmonic sensors since they produce sharper and fine-tuned resonances resulting in higher sensitivities and resolutions. This article evaluates the performance of three different plasmonic optical fiber sensors based on D-type and suspended core fibers with metallic nanowires. It addresses how their different materials, geometry of the components, and their relative position can influence the coupling between the localized plasmonic modes and the guided optical mode. It also evaluates how that affects the spatial distributions of optical power of the different modes and consequently their overlap and coupling, which ultimately impacts the sensor performance. In this work, we use numerical simulations based on finite element methods to validate the importance of tailoring the features of the guided optical mode to promote an enhanced coupling with the localized modes. The results in terms of sensitivity and resolution demonstrate the advantages of using suspended core fibers with metallic nanowires.

ACS Style

Diego Santos; Ariel Guerreiro; José Manuel Baptista. Evaluation of Nanoplasmonic Optical Fiber Sensors Based on D-Type and Suspended Core Fibers with Metallic Nanowires. Photonics 2019, 6, 100 .

AMA Style

Diego Santos, Ariel Guerreiro, José Manuel Baptista. Evaluation of Nanoplasmonic Optical Fiber Sensors Based on D-Type and Suspended Core Fibers with Metallic Nanowires. Photonics. 2019; 6 (3):100.

Chicago/Turabian Style

Diego Santos; Ariel Guerreiro; José Manuel Baptista. 2019. "Evaluation of Nanoplasmonic Optical Fiber Sensors Based on D-Type and Suspended Core Fibers with Metallic Nanowires." Photonics 6, no. 3: 100.

Review
Published: 13 April 2019 in Sensors
Reads 0
Downloads 0

This article presents a review of the numerical techniques employed in simulating plasmonic optical sensors based on metal-dielectric nanostructures, including examples, ranging from conventional D-type fiber sensors, to those based on photonic crystal D-type fibers and incorporating metamaterials, nanowires, among other new materials and components, results and applications. We start from the fundamental physical processes, such as optical and plasmonic mode coupling, and discuss the implementation of the numerical model, optical response customization and their impact in sensor performance. Finally, we examine future perspectives.

ACS Style

Ariel Guerreiro; Diego Santos; José Manuel Baptista. New Trends in the Simulation of Nanosplasmonic Optical D-Type Fiber Sensors. Sensors 2019, 19, 1772 .

AMA Style

Ariel Guerreiro, Diego Santos, José Manuel Baptista. New Trends in the Simulation of Nanosplasmonic Optical D-Type Fiber Sensors. Sensors. 2019; 19 (8):1772.

Chicago/Turabian Style

Ariel Guerreiro; Diego Santos; José Manuel Baptista. 2019. "New Trends in the Simulation of Nanosplasmonic Optical D-Type Fiber Sensors." Sensors 19, no. 8: 1772.

Review
Published: 16 September 2017 in Applied Sciences
Reads 0
Downloads 0

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.

ACS Style

Joana Ribeiro; Duarte Viveiros; João Ferreira; Alexia Lopez-Gil; Alejandro Dominguez-Lopez; Hugo Martins; Rosa Perez-Herrera; Aitor Lopez-Aldaba; Lia Duarte; Ana Pinto; Sonia Martin-Lopez; Hardy Baierl; Raphael Jamier; Sébastien Rougier; Jean-Louis Auguste; Ana Teodoro; Jose Gonçalves; Oscar Esteban; José Luís Santos; Philippe Roy; Manuel Lopez-Amo; Miguel Gonzalez-Herraez; José Manuel Baptista; Deolinda Flores. ECOAL Project—Delivering Solutions for Integrated Monitoring of Coal-Related Fires Supported on Optical Fiber Sensing Technology. Applied Sciences 2017, 7, 956 .

AMA Style

Joana Ribeiro, Duarte Viveiros, João Ferreira, Alexia Lopez-Gil, Alejandro Dominguez-Lopez, Hugo Martins, Rosa Perez-Herrera, Aitor Lopez-Aldaba, Lia Duarte, Ana Pinto, Sonia Martin-Lopez, Hardy Baierl, Raphael Jamier, Sébastien Rougier, Jean-Louis Auguste, Ana Teodoro, Jose Gonçalves, Oscar Esteban, José Luís Santos, Philippe Roy, Manuel Lopez-Amo, Miguel Gonzalez-Herraez, José Manuel Baptista, Deolinda Flores. ECOAL Project—Delivering Solutions for Integrated Monitoring of Coal-Related Fires Supported on Optical Fiber Sensing Technology. Applied Sciences. 2017; 7 (9):956.

Chicago/Turabian Style

Joana Ribeiro; Duarte Viveiros; João Ferreira; Alexia Lopez-Gil; Alejandro Dominguez-Lopez; Hugo Martins; Rosa Perez-Herrera; Aitor Lopez-Aldaba; Lia Duarte; Ana Pinto; Sonia Martin-Lopez; Hardy Baierl; Raphael Jamier; Sébastien Rougier; Jean-Louis Auguste; Ana Teodoro; Jose Gonçalves; Oscar Esteban; José Luís Santos; Philippe Roy; Manuel Lopez-Amo; Miguel Gonzalez-Herraez; José Manuel Baptista; Deolinda Flores. 2017. "ECOAL Project—Delivering Solutions for Integrated Monitoring of Coal-Related Fires Supported on Optical Fiber Sensing Technology." Applied Sciences 7, no. 9: 956.

Journal article
Published: 22 August 2017 in IEEE Sensors Journal
Reads 0
Downloads 0

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 \text{T}_{\mathrm {\mathbf {rms}}}/\surd $ Hz from 1.22 mTrms up to 2.53 mTrms.

ACS Style

Ivo M. Nascimento; Giancarlo Chesini; Jose Baptista; Cristiano Monteiro De Barros Cordeiro; Pedro Jorge. Vibration and Magnetic Field Sensing Using a Long-Period Grating. IEEE Sensors Journal 2017, 17, 6615 -6621.

AMA Style

Ivo M. Nascimento, Giancarlo Chesini, Jose Baptista, Cristiano Monteiro De Barros Cordeiro, Pedro Jorge. Vibration and Magnetic Field Sensing Using a Long-Period Grating. IEEE Sensors Journal. 2017; 17 (20):6615-6621.

Chicago/Turabian Style

Ivo M. Nascimento; Giancarlo Chesini; Jose Baptista; Cristiano Monteiro De Barros Cordeiro; Pedro Jorge. 2017. "Vibration and Magnetic Field Sensing Using a Long-Period Grating." IEEE Sensors Journal 17, no. 20: 6615-6621.

Journal article
Published: 01 June 2017 in Optik
Reads 0
Downloads 0
ACS Style

Diego Felipe Santos; Ariel Guerreiro; José Manuel Baptista. Surface plasmon resonance sensor based on D-type fiber with a gold wire. Optik 2017, 139, 244 -249.

AMA Style

Diego Felipe Santos, Ariel Guerreiro, José Manuel Baptista. Surface plasmon resonance sensor based on D-type fiber with a gold wire. Optik. 2017; 139 ():244-249.

Chicago/Turabian Style

Diego Felipe Santos; Ariel Guerreiro; José Manuel Baptista. 2017. "Surface plasmon resonance sensor based on D-type fiber with a gold wire." Optik 139, no. : 244-249.

Conference paper
Published: 23 April 2017 in 25th International Conference on Optical Fiber Sensors
Reads 0
Downloads 0

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 1.87×10-6RIU were found. © (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

ACS Style

D. F. Santos; Ariel Guerreiro; J. M. Baptista. Optimization of modal sensitivity in nanowire SPR multimode sensor. 25th International Conference on Optical Fiber Sensors 2017, 10323, 1032330 .

AMA Style

D. F. Santos, Ariel Guerreiro, J. M. Baptista. Optimization of modal sensitivity in nanowire SPR multimode sensor. 25th International Conference on Optical Fiber Sensors. 2017; 10323 ():1032330.

Chicago/Turabian Style

D. F. Santos; Ariel Guerreiro; J. M. Baptista. 2017. "Optimization of modal sensitivity in nanowire SPR multimode sensor." 25th International Conference on Optical Fiber Sensors 10323, no. : 1032330.

Journal article
Published: 23 February 2017 in IEEE Sensors Journal
Reads 0
Downloads 0

This paper presents an optical fiber sensor, that uses surface plasmon resonance on metallic wires to directly and simultaneously measure both the refractive index and the temperature. The sensor is constituted by gold wires on a D-type fiber engineered, using numerical simulations based on the finite-element method to support plasmon modes with strong dependencies to either one of the measured parameters. In particular, the influence of the temperature on the structure of the plasmon modes results from contributions from the thermo-optic effect in the fiber core and sensing layer, and phonon-electron scattering along with electron-electron scattering in the metal wire. The performance of the sensor is evaluated in terms of its sensitivity and resolution.

ACS Style

Diego Felipe Santos; Ariel Guerreiro; Jose Baptista. Simultaneous Plasmonic Measurement of Refractive Index and Temperature Based on a D-Type Fiber Sensor With Gold Wires. IEEE Sensors Journal 2017, 17, 2439 -2446.

AMA Style

Diego Felipe Santos, Ariel Guerreiro, Jose Baptista. Simultaneous Plasmonic Measurement of Refractive Index and Temperature Based on a D-Type Fiber Sensor With Gold Wires. IEEE Sensors Journal. 2017; 17 (8):2439-2446.

Chicago/Turabian Style

Diego Felipe Santos; Ariel Guerreiro; Jose Baptista. 2017. "Simultaneous Plasmonic Measurement of Refractive Index and Temperature Based on a D-Type Fiber Sensor With Gold Wires." IEEE Sensors Journal 17, no. 8: 2439-2446.

Journal article
Published: 18 November 2016 in Optical Fiber Technology
Reads 0
Downloads 0

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.

ACS Style

D.F. Santos; Ariel Guerreiro; J.M. Baptista. SPR optimization using metamaterials in a D-type PCF refractive index sensor. Optical Fiber Technology 2016, 33, 83 -88.

AMA Style

D.F. Santos, Ariel Guerreiro, J.M. Baptista. SPR optimization using metamaterials in a D-type PCF refractive index sensor. Optical Fiber Technology. 2016; 33 ():83-88.

Chicago/Turabian Style

D.F. Santos; Ariel Guerreiro; J.M. Baptista. 2016. "SPR optimization using metamaterials in a D-type PCF refractive index sensor." Optical Fiber Technology 33, no. : 83-88.

Proceedings article
Published: 30 May 2016 in Sixth European Workshop on Optical Fibre Sensors
Reads 0
Downloads 0

This paper presents a numerically investigation of the performance analysis of a conventional photonic crystal fiber (PCF) with a planar metamaterials structure for refractive index sensing, based on surface plasmon resonance (SPR), using the finite element method (FEM). We study the concentration metamaterials conformed by the aluminium oxide (Al2O3) and silver (Ag) and compared its performance with a single metal (Ag), assessing their impacts in the effective refractive index. Furthermore, we also use different types of mechanics to describe the effects of varying the structural parameters sensor on the evanescent field and the sensor performance. © (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

ACS Style

D. F. Santos; Ariel Guerreiro; J. M. Baptista. SPR-based PCF D-type sensor based on a metamaterial composed of planar metals for refractive index sensing. Sixth European Workshop on Optical Fibre Sensors 2016, 9916, 991619 .

AMA Style

D. F. Santos, Ariel Guerreiro, J. M. Baptista. SPR-based PCF D-type sensor based on a metamaterial composed of planar metals for refractive index sensing. Sixth European Workshop on Optical Fibre Sensors. 2016; 9916 ():991619.

Chicago/Turabian Style

D. F. Santos; Ariel Guerreiro; J. M. Baptista. 2016. "SPR-based PCF D-type sensor based on a metamaterial composed of planar metals for refractive index sensing." Sixth European Workshop on Optical Fibre Sensors 9916, no. : 991619.

Proceedings article
Published: 30 May 2016 in Sixth European Workshop on Optical Fibre Sensors
Reads 0
Downloads 0

A long-period grating (LPG) written on a standard single mode fiber is investigated as a curvature and vibration sensor. It is demonstrated a high sensitivity 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 an intensity based interrogation scheme with the LPG sensor operating in the curvature regime. Results have shown a reproducible frequency discrimination in the 30 Hz to 2000 Hz, with resolutions between 11 mHz and 913 mHz. Frequency retrieval could be performed independent of temperature up to 86 °C. © (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

ACS Style

Ivo Maciel Nascimento; G. Chesini; J. M. Baptista; Cristiano M. B. Cordeiro; P. A. S. Jorge. LPG-based sensor for curvature and vibration. Sixth European Workshop on Optical Fibre Sensors 2016, 9916, 99162 .

AMA Style

Ivo Maciel Nascimento, G. Chesini, J. M. Baptista, Cristiano M. B. Cordeiro, P. A. S. Jorge. LPG-based sensor for curvature and vibration. Sixth European Workshop on Optical Fibre Sensors. 2016; 9916 ():99162.

Chicago/Turabian Style

Ivo Maciel Nascimento; G. Chesini; J. M. Baptista; Cristiano M. B. Cordeiro; P. A. S. Jorge. 2016. "LPG-based sensor for curvature and vibration." Sixth European Workshop on Optical Fibre Sensors 9916, no. : 99162.

Journal article
Published: 01 January 2016 in Water Intelligence Online
Reads 0
Downloads 0

The IWA Performance Indicator System for water services is now recognized as a worldwide reference. Since it first appearance in 2000, the system has been widely quoted, adapted and used in a large number of projects both for internal performance assessment and metric benchmarking. Water professionals have benefited from a coherent and flexible system, with precise and detailed definitions that in many cases have become a standard. The system has proven to be adaptable and it has been used in very different contexts for diverse purposes. The Performance Indicators System can be used in any organization regardless of its size, nature (public, private, etc.) or degree of complexity and development. The third edition of Performance Indicators for Water Supply Services represents a further improvement of the original manual. It contains a reviewed and consolidated version of the indicators, resulting from the real needs of water companies worldwide that were expressed during the extensive field testing of the original system. The indicators now properly cover bulk distribution and the needs of developing countries, and all definitions have been thoroughly revised. The confidence grading scheme has been simplified and the procedure to assess the results- uncertainty has been significantly enhanced. In addition to the updated contents of the original edition, a large part of the manual is now devoted to the practical application of the system. Complete with simplified step-by-step implementation procedures and case studies, the manual provides guidelines on how to adapt the IWA concepts and indicators to specific contexts and objectives. This new edition of Performance Indicators for Water Supply Services is an invaluable reference source for all those concerned with managing the performance of the water supply industry, including those in the water utilities as well as regulators, policy-makers and financial agencies. This title belongs to Manual of Best Practice ISBN: 9781780406336 (eBook) ISBN: 9781780406329 (Print)

ACS Style

Helena Alegre; Jaime Melo Baptista; Enrique Cabrera; Francisco Cubillo; Patrícia Duarte; Wolfram Hirner; Wolf Merkel; Renato Parena. Performance Indicators for Water Supply Services: Third Edition. Water Intelligence Online 2016, 15, 1 .

AMA Style

Helena Alegre, Jaime Melo Baptista, Enrique Cabrera, Francisco Cubillo, Patrícia Duarte, Wolfram Hirner, Wolf Merkel, Renato Parena. Performance Indicators for Water Supply Services: Third Edition. Water Intelligence Online. 2016; 15 ():1.

Chicago/Turabian Style

Helena Alegre; Jaime Melo Baptista; Enrique Cabrera; Francisco Cubillo; Patrícia Duarte; Wolfram Hirner; Wolf Merkel; Renato Parena. 2016. "Performance Indicators for Water Supply Services: Third Edition." Water Intelligence Online 15, no. : 1.

Journal article
Published: 22 October 2015 in Sensors and Actuators A: Physical
Reads 0
Downloads 0

An erbium doped (Er3+) fiber optic laser is proposed for magnetic field measurement. A pair of FBGs glued onto a magnetostrictive material (Terfenol-D rod) modulates the laser wavelength operation when subject to a static or a time dependent magnetic field. A passive interferometer is employed to measure the laser wavelength changes due to the applied magnetic field. A data acquisition hardware and a LabVIEW software measure three phase-shifted signals at the output coupler of the interferometer and process them using two distinct demodulation algorithms. Results show that sensitivity to varying magnetic fields can be tuned by introducing a biasing magnetic field. A maximum error of 0.79% was found, for magnetic fields higher than 2.26 mTRMS.

ACS Style

Ivo Maciel Nascimento; J.M. Baptista; P.A.S. Jorge; J.L. Cruz; M.V. Andrés. Passive interferometric interrogation of a magnetic field sensor using an erbium doped fiber optic laser with magnetostrictive transducer. Sensors and Actuators A: Physical 2015, 235, 227 -233.

AMA Style

Ivo Maciel Nascimento, J.M. Baptista, P.A.S. Jorge, J.L. Cruz, M.V. Andrés. Passive interferometric interrogation of a magnetic field sensor using an erbium doped fiber optic laser with magnetostrictive transducer. Sensors and Actuators A: Physical. 2015; 235 ():227-233.

Chicago/Turabian Style

Ivo Maciel Nascimento; J.M. Baptista; P.A.S. Jorge; J.L. Cruz; M.V. Andrés. 2015. "Passive interferometric interrogation of a magnetic field sensor using an erbium doped fiber optic laser with magnetostrictive transducer." Sensors and Actuators A: Physical 235, no. : 227-233.

Conference paper
Published: 28 September 2015 in 24th International Conference on Optical Fibre Sensors
Reads 0
Downloads 0

In this work two erbium doped optical fiber laser configurations for magnetic field measurement are implemented and compared. The first laser is set-up in a loop configuration and requires only a single FBG (Fiber Bragg Grating), acting as mirror. A second laser employs a simpler linear cavity configuration but requires two FBGs with spectral overlap to form the laser cavity. A bulk magnetostrictive material made of Terfenol-D is attached to the laser FBGs enabling modulation of its operation wavelength by the magnetic field. Moreover, a passive interferometer was developed to demodulate the AC magnetic field information where the corresponding demodulation algorithms were software based. Both configurations are tested and compared with the results showing different sensitivities and resolutions. Better performance was accomplished with the double FBGs linear cavity configuration with a resolution of 0.05 mTRMS in the range of 8 to 16 mTRMS. For the same range the loop configuration attained a resolution of 0.48 mTRMS.

ACS Style

Ivo Maciel Nascimento; J. M. Baptista; P. A. S. Jorge; J. L. Cruz; M. V. Andrés. Erbium doped optical fiber lasers for magnetic field sensing. 24th International Conference on Optical Fibre Sensors 2015, 9634, 96345T .

AMA Style

Ivo Maciel Nascimento, J. M. Baptista, P. A. S. Jorge, J. L. Cruz, M. V. Andrés. Erbium doped optical fiber lasers for magnetic field sensing. 24th International Conference on Optical Fibre Sensors. 2015; 9634 ():96345T.

Chicago/Turabian Style

Ivo Maciel Nascimento; J. M. Baptista; P. A. S. Jorge; J. L. Cruz; M. V. Andrés. 2015. "Erbium doped optical fiber lasers for magnetic field sensing." 24th International Conference on Optical Fibre Sensors 9634, no. : 96345T.

Conference paper
Published: 28 September 2015 in 24th International Conference on Optical Fibre Sensors
Reads 0
Downloads 0

It is presented an optical fiber sensing system projected to operate in the demanding conditions associated with coal waste piles in combustion. Distributed temperature measurement and spot gas sensing are requirements for such a system. A field prototype has been installed and is continuously gathering data, which will input a geological model of the coal waste piles in combustion aiming to understand their dynamics and evolution. Results are presented on distributed temperature and ammonia measurement, being noticed any significant methane emission in the short time period considered. Carbon dioxide is also a targeted gas for measurement, with validated results available soon. The assessment of this technology as an effective and reliable tool to address the problem of monitoring coal waste piles in combustion opens the possibility of its widespread application in view of the worldwide presence of coal related fires.

ACS Style

Duarte Viveiros; Joana Ribeiro; Joao Ferreira; A. Lopez-Albada; A. M. R. Pinto; R. A. Perez-Herrera; Silvia Diaz; A. Lopez-Gil; A. Dominguez-Lopez; Ó. Esteban; S. Martin-Lopez; J.-L. Auguste; R. Jamier; S. Rougier; Susana Silva; Orlando Frazão; J. L. Santos; Deolinda Flores; P. Roy; M. Gonzalez-Herraez; Manuel Lopez-Amo; J. M. Baptista. Fiber optic sensing system for temperature and gas monitoring in coal waste pile combustion environments. 24th International Conference on Optical Fibre Sensors 2015, 9634, 96343Y .

AMA Style

Duarte Viveiros, Joana Ribeiro, Joao Ferreira, A. Lopez-Albada, A. M. R. Pinto, R. A. Perez-Herrera, Silvia Diaz, A. Lopez-Gil, A. Dominguez-Lopez, Ó. Esteban, S. Martin-Lopez, J.-L. Auguste, R. Jamier, S. Rougier, Susana Silva, Orlando Frazão, J. L. Santos, Deolinda Flores, P. Roy, M. Gonzalez-Herraez, Manuel Lopez-Amo, J. M. Baptista. Fiber optic sensing system for temperature and gas monitoring in coal waste pile combustion environments. 24th International Conference on Optical Fibre Sensors. 2015; 9634 ():96343Y.

Chicago/Turabian Style

Duarte Viveiros; Joana Ribeiro; Joao Ferreira; A. Lopez-Albada; A. M. R. Pinto; R. A. Perez-Herrera; Silvia Diaz; A. Lopez-Gil; A. Dominguez-Lopez; Ó. Esteban; S. Martin-Lopez; J.-L. Auguste; R. Jamier; S. Rougier; Susana Silva; Orlando Frazão; J. L. Santos; Deolinda Flores; P. Roy; M. Gonzalez-Herraez; Manuel Lopez-Amo; J. M. Baptista. 2015. "Fiber optic sensing system for temperature and gas monitoring in coal waste pile combustion environments." 24th International Conference on Optical Fibre Sensors 9634, no. : 96343Y.

Conference paper
Published: 28 September 2015 in 24th International Conference on Optical Fibre Sensors
Reads 0
Downloads 0
ACS Style

D. F. Santos; Ariel Guerreiro; J. M. Baptista. New SPR PCF D-type optical fiber sensor configuration for refractive index measurement. 24th International Conference on Optical Fibre Sensors 2015, 96346Z -96346Z-4.

AMA Style

D. F. Santos, Ariel Guerreiro, J. M. Baptista. New SPR PCF D-type optical fiber sensor configuration for refractive index measurement. 24th International Conference on Optical Fibre Sensors. 2015; ():96346Z-96346Z-4.

Chicago/Turabian Style

D. F. Santos; Ariel Guerreiro; J. M. Baptista. 2015. "New SPR PCF D-type optical fiber sensor configuration for refractive index measurement." 24th International Conference on Optical Fibre Sensors , no. : 96346Z-96346Z-4.

Original articles
Published: 21 August 2015 in Instrumentation Science & Technology
Reads 0
Downloads 0

A clamp-on optical current sensor prototype for metering and protection applications in high power systems was developed and characterized. The system is based on the Faraday effect in a low birefringence, high Verdet constant, 8 cm long SF57 Schott glass prism. It was incorporated in a nylon casing suitable for clamp-on applications in the power line. The sensor operation was tested at 630 nm, 830 nm, and 1550 nm to access its applicability in remote interrogation via fiber links. Optimal operation at 830 nm is reported with a linear response up to 65.28kA, with 0.1 or 0.2 accuracy class considering a nominal currents of 1.2 and 0.3 kA (root mean square), respectively. Twelve calibrations procedures performed over six days showed an estimated maximum error of 11 m A. Preliminary measurements were made from 40 to 400 Hz. The sensor was exposed to transient signals less than 10 µs that demonstrated its use in protection applications.

ACS Style

Ivo Maciel Nascimento; A. C. S. Brigida; J. M. Baptista; J. C. W. A. Costa; M. A. G. Martinez; P. A. S. Jorge. Novel optical current sensor for metering and protection in high power applications. Instrumentation Science & Technology 2015, 44, 148 -162.

AMA Style

Ivo Maciel Nascimento, A. C. S. Brigida, J. M. Baptista, J. C. W. A. Costa, M. A. G. Martinez, P. A. S. Jorge. Novel optical current sensor for metering and protection in high power applications. Instrumentation Science & Technology. 2015; 44 (2):148-162.

Chicago/Turabian Style

Ivo Maciel Nascimento; A. C. S. Brigida; J. M. Baptista; J. C. W. A. Costa; M. A. G. Martinez; P. A. S. Jorge. 2015. "Novel optical current sensor for metering and protection in high power applications." Instrumentation Science & Technology 44, no. 2: 148-162.