Prof. Orlando Frazão Profile

Prof. Orlando Frazão

Senior Researcher at INESC Porto

SPIE Involvement:

Author

Publications (152)

Proceedings Article | 20 June 2024 Presentation + Paper

Coreless silica fiber sensor based on self-image theory and coated with graphene oxide

Cristina Cunha, Catarina Monteiro, António Vaz, Susana Silva, Orlando Frazão, Susana Novais

Proceedings Volume 12999, 1299905 (2024) https://doi.org/10.1117/12.3022374

KEYWORDS: Sensors, Glucose, Graphene, Oxides, Optical fibers, Design, Single mode fibers, Refractive index, Reflection, Coating

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Proceedings Article | 20 June 2024 Presentation + Paper

Optimizing graphene oxide saturable absorbers for short pulse generation in fiber lasers: characterization and aging assessment

Catarina Monteiro, Rosa Perez-Herrera, Nuno Silva, Susana Silva, Orlando Frazão

Proceedings Volume 13003, 1300303 (2024) https://doi.org/10.1117/12.3022172

KEYWORDS: Fiber lasers, Laser stabilization, Mode locking, Thin films, Ring lasers, Graphene, Oxides, Polarization, Laser systems engineering

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Proceedings Article | 23 May 2023 Paper

Erbium-doped fiber ring cavity for the measurement of refractive index variations

Rosa Ana Perez-Herrera, Liliana Soares, Susana Novais, Orlando Frazão, Susana Silva

Proceedings Volume 12643, 126431E (2023) https://doi.org/10.1117/12.2678101

KEYWORDS: Refractive index, Sensors, Fiber Bragg gratings, Spontaneous emission, Reflectors, Bioalcohols, Liquids, Wavelength division multiplexing, Water

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Proceedings Article | 3 October 2019 Paper

Enhanced temperature sensing with Vernier effect on fiber probe based on multimode Fabry-Perot interferometer

André Gomes, Martin Becker, Jan Dellith, Mohammad Zibaii, Hamid Latifi, Manfred Rothhardt, Hartmut Bartelt, Orlando Frazão

Proceedings Volume 11207, 112071I (2019) https://doi.org/10.1117/12.2527399

KEYWORDS: Fabry–Perot interferometry, Interferometers, Biosensing, Sensors, Optical fibers, Multimode fibers, Superposition, Temperature sensors

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Proceedings Article | 3 October 2019 Paper

3D prototyping of a fiber Bragg grating vibration sensor for power transformers

Catarina Monteiro, Duarte Viveiros, Cassiano Linhares, S. M. Tavares, Hélder Mendes, Susana Silva, Paulo V. Marques, Orlando Frazão

Proceedings Volume 11207, 1120727 (2019) https://doi.org/10.1117/12.2530084

KEYWORDS: Sensors, Fiber Bragg gratings, Transformers, Finite element methods, Prototyping, 3D printing, Structural sensing, Fiber optics sensors

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Proceedings Article | 3 October 2019 Paper

Graphene oxide as a tunable platform for microsphere-based optical fiber sensors

Catarina Monteiro, Maria Raposo, Paulo Ribeiro, Susana Silva, Orlando Frazão

Proceedings Volume 11207, 112070X (2019) https://doi.org/10.1117/12.2527267

KEYWORDS: Graphene, Reflectivity, Oxides, Fiber optics sensors, Silica, Refractive index, Sensors, Single mode fibers, Capillaries, Fabry–Perot interferometry

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Proceedings Article | 3 October 2019 Paper

Functional metamaterials for optical sensing of hydrogen

A. Guerreiro, Arlete Apolinario, Armandina Lopes, Aurelio Hierro-Rodriguez, Gerardo Aguilar, Jose Manuel Baptista, Nuno Silva, Orlando Frazão, Paula Virginia Quiterio, Pedro Jorge, Pedro Rodrigues, Suellen Silveira Moraes, Susana Silva, Tiago Ferreira, Jose Luis Santos, João Pedro Araujo

Proceedings Volume 11207, 1120724 (2019) https://doi.org/10.1117/12.2527672

KEYWORDS: Palladium, Metamaterials, Hydrogen, Optical properties, Refractive index, Sensors, Nanowires, Optical sensing, Optical fibers, Dendrites

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Proceedings Article | 28 August 2019 Paper

Multiplexing optical fiber Fabry-Perot interferometers based on air-microcavities

R. A. Pérez Herrera, S. Novais, M. Bravo, D. Leandro, S. Silva, O. Frazao, M. Lopez-Amo

Proceedings Volume 11199, 1119925 (2019) https://doi.org/10.1117/12.2540150

KEYWORDS: Sensors, Multiplexing, Fiber Bragg gratings, Optical fibers, Fabry–Perot interferometry, Fiber optics sensors, Silica, Interferometry, Single mode fibers, Optical resolution

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Proceedings Article | 28 August 2019 Paper

FBG two-dimensional vibration sensor for power transformers

Catarina Monteiro, A. Vaz, D. Viveiros, C. Linhares, S. M. Tavares, H. Mendes, S. Silva, P. V. Marques, O. Frazão

Proceedings Volume 11199, 111990M (2019) https://doi.org/10.1117/12.2541132

KEYWORDS: Transformers, Sensors, Fiber Bragg gratings, Fiber optics sensors, 3D printing, Prototyping, Electrical breakdown, Chemical analysis

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Proceedings Article | 28 August 2019 Paper

Fabry-Perot cavity for curvature measurement in a medical needle

Susana Novais, Susana Silva, Orlando Frazão

Proceedings Volume 11199, 111991B (2019) https://doi.org/10.1117/12.2540504

KEYWORDS: Sensors, Structural sensing, Fabry–Perot interferometers, Head, Multimode fibers, Fiber optics sensors, Optical microcavities, Optical fibers, Reflection, Microscopes

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Proceedings Article | 18 August 2018 Presentation + Paper

Multi-path interferometer structures with cleaved silica microspheres

André Gomes, Beatriz Silveira, Fatemeh Karami, Mohammad Zibaii, Hamid Latifi, Jan Dellith, Martin Becker, Manfred Rothhardt, Hartmut Bartelt, Orlando Frazão

Proceedings Volume 10749, 107490O (2018) https://doi.org/10.1117/12.2319082

KEYWORDS: Fiber optics sensors, Interferometry, Interferometers, Ion beams, Silica, Temperature metrology, Modulation, Fourier transforms, Multimode fibers

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Proceedings Article | 22 August 2017 Paper

Simultaneous measurement of temperature and refractive index based on microfiber knot resonator integrated in an abrupt taper Mach-Zehnder interferometer

André Gomes, Orlando Frazão

Proceedings Volume 10453, 1045324 (2017) https://doi.org/10.1117/12.2275813

KEYWORDS: Refractive index, Temperature metrology, Resonators, Mach-Zehnder interferometers, Fiber optics sensors, Temperature sensors, Sensors, Carbon dioxide lasers

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Proceedings Article | 22 August 2017 Paper

Fabry-Perot interferometer based on array of microspheres for temperature sensing

Marta Ferreira, Jörg Bierlich, Jens Kobelke, José Santos, Orlando Frazão

Proceedings Volume 10453, 1045321 (2017) https://doi.org/10.1117/12.2275658

KEYWORDS: Fabry–Perot interferometry, Sensors, Soda-lime glass, Silica, Visibility, Temperature metrology, Capillaries

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Proceedings Article | 22 August 2017 Paper

Strain sensor based on hollow microsphere Fabry-Perot cavity

Catarina Monteiro, Susana Silva, Orlando Frazão

Proceedings Volume 10453, 1045326 (2017) https://doi.org/10.1117/12.2275862

KEYWORDS: Sensors, Structural sensing, Fabry–Perot interferometers, Interferometry, Fiber optics, Optical sensors, Fusion splicing, Fabrication, Thermal sensing

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Proceedings Article | 22 August 2017 Paper

Polymer and tapered silica fiber connection for polymer fiber sensor application

Miguel F. Ferreira, André Gomes, Dominik Kowal, Gabriela Statkiewicz-Barabach, Pawel Mergo, Orlando Frazão

Proceedings Volume 10453, 104532W (2017) https://doi.org/10.1117/12.2276343

KEYWORDS: Polymers, Optical fibers, Silica, Polymeric sensors, Polymer optical fibers, Fiber optics sensors, Sensors, Fiber lasers, 3D microstructuring, Optical alignment

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Proceedings Article | 23 April 2017 Paper

Refractive index sensor using a Fabry-Perot cavity in polymer fiber

Miguel F. Ferreira, Gabriela Statkiewicz-Barabach, Dominik Kowal, Pawel Mergo, Waclaw Urbanczyk, Orlando Frazão

Proceedings Volume 10323, 1032333 (2017) https://doi.org/10.1117/12.2264714

KEYWORDS: Polymer optical fibers, Optical fibers, Liquids, Sensors, Refractive index, Polymers, Polymeric sensors, Photorefractive polymers, Fiber Bragg gratings, Fabry–Perot interferometers

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Proceedings Article | 23 April 2017 Paper

Combined microfiber knot resonator and focused ion beam-milled Mach-Zehnder interferometer for refractive index measurement

André Gomes, Ricardo André, Stephen Warren-Smith, Jan Dellith, Martin Becker, Manfred Rothhardt, Orlando Frazão

Proceedings Volume 10323, 1032340 (2017) https://doi.org/10.1117/12.2265387

KEYWORDS: Scanning electron microscopy, Resonators, Refractive index, Sensors, Mach-Zehnder interferometers, Ion beams, Ions, Visible radiation, Modulation, Temperature metrology

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Proceedings Article | 23 April 2017 Paper

Analysis of signal saturation in a fiber ring resonator integrating an intensity sensor

Regina Magalhães, Susana Silva, Orlando Frazão

Proceedings Volume 10323, 103234S (2017) https://doi.org/10.1117/12.2265877

KEYWORDS: Sensors, Resonators, Signal analyzers, Optical fibers, Pulsed laser operation, Oscilloscopes, Photodetectors, Signal attenuation, Fiber characterization, Fiber lasers

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Proceedings Article | 23 April 2017 Paper

Fiber Bragg grating sensor based on cantilever structure embedded in polymer 3D printed material

Rita Lima, R. Tavares, S. Silva, P. Abreu, Maria Restivo, O. Frazão

Proceedings Volume 10323, 1032331 (2017) https://doi.org/10.1117/12.2264600

KEYWORDS: Sensors, Fiber Bragg gratings, Polymeric sensors, Polymers, 3D printing, Coating, Vibrometry, Printing, Optical components, Temperature metrology

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Proceedings Article | 23 April 2017 Paper

Embedded Fabry-Perot based sensor using three-dimensional printing technology

Catarina Monteiro, Bruno Santos, Susana Silva, Paulo Abreu, Maria Restivo, Orlando Frazão

Proceedings Volume 10323, 1032362 (2017) https://doi.org/10.1117/12.2263274

KEYWORDS: Sensors, 3D printing, Printing, Fabry–Perot interferometers, Interferometry, Single mode fibers, Environmental sensing, 3D surface sensing, Reflection, Prototyping

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Proceedings Article | 23 April 2017 Paper

Refractive index sensing using a multimode interference-based fiber sensor in a cavity ring-down system

Susana Silva, Orlando Frazão

Proceedings Volume 10323, 103232M (2017) https://doi.org/10.1117/12.2263437

KEYWORDS: Sensing systems, Fiber optics sensors, Refractive index, Multimode fibers, Water, Head, Brain-machine interfaces, Single mode fibers, Modulation, Laser sources

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Proceedings Article | 23 April 2017 Paper

Fabry-Perot sensor based on two coupled microspheres for strain measurement

Catarina Monteiro, Jens Kobelke, Kay Schuster, Jörg Bierlich, Orlando Frazão

Proceedings Volume 10323, 103232F (2017) https://doi.org/10.1117/12.2263332

KEYWORDS: Sensors, Fabry–Perot interferometers, Fabrication, Fusion splicing, Environmental sensing, Single mode fibers, Silica, Fiber optics sensors, Temperature metrology, Optical fibers

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Proceedings Article | 15 September 2016 Presentation + Paper

Tapered optical fiber tip probes based on focused ion beam-milled Fabry-Perot microcavities

Ricardo André, Stephen Warren-Smith, Martin Becker, Jan Dellith, Manfred Rothhardt, M. Zibaii, H. Latifi, Manuel B. Marques, Hartmut Bartelt, Orlando Frazão

Proceedings Volume 9927, 99270R (2016) https://doi.org/10.1117/12.2236321

KEYWORDS: Refractive index, Tapered optical fibers, Optical microcavities, Ion beams, Fabry–Perot interferometers, Wet etching, Silica, Water, Ions, Solids

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Proceedings Article | 30 May 2016 Paper

Temperature-independent strain sensor based on a tapered Bragg fibre fabricated using a CO2 laser

T. J. Martins, M. Marques, P. Roy, R. Jamier, S. Février, O. Frazão

Proceedings Volume 9916, 99161O (2016) https://doi.org/10.1117/12.2235239

KEYWORDS: Sensors, Interferometry, Fiber lasers, Fiber optics sensors, Optical fibers, Interferometers, Temperature metrology, Electromagnetism, Polarimetry, Gas lasers, Cladding, Carbon dioxide lasers, Structured optical fibers, Dispersion, Modulation, Light sources

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Proceedings Article | 30 May 2016 Paper

Curvature sensor based on a Fabry-Perot interferometer

Catarina Monteiro, Marta Ferreira, Jens Kobelke, Kay Schuster, Jörg Bierlich, Orlando Frazão

Proceedings Volume 9916, 991603 (2016) https://doi.org/10.1117/12.2235215

KEYWORDS: Fabry–Perot interferometry, Sensors, Capillaries, Silica, Fusion splicing, Single mode fibers, Fabry–Perot interferometers, Head, Mechanical sensors, Optical fibers, Visibility

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Proceedings Article | 30 May 2016 Paper

Cavity ring-down technique for remote sensing: a proof-of-concept for displacement measurement

Susana Silva, M. Marques, O. Frazão

Proceedings Volume 9916, 991615 (2016) https://doi.org/10.1117/12.2236003

KEYWORDS: Remote sensing, Optical testing, Fiber optics sensors, Fiber couplers, Optical fibers, Sensors, Light sources, Signal attenuation, Fiber Bragg gratings

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Proceedings Article | 30 May 2016 Paper

Fiber probe microcavities for refractive index and temperature discrimination

Ricardo André, Stephen Warren-Smith, Martin Becker, Jan Dellith, Manfred Rothhardt, M. Zibaii, H. Latifi, Manuel Marques, Hartmut Bartelt, Orlando Frazão

Proceedings Volume 9916, 991616 (2016) https://doi.org/10.1117/12.2236009

KEYWORDS: Optical microcavities, Refractive index, Ion beams, Structured optical fibers, Fabry–Perot interferometry, Fiber optics sensors, Laser beam diagnostics, Electronic filtering, Fourier transforms, Bandpass filters, Sensors, Water, Ions, Silica

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Proceedings Article | 28 September 2015 Paper

Bragg grating fabrication on tapered fiber tips based on focused ion beam milling

Ricardo André, Martin Becker, Jan Dellith, Manfred Rothhardt, M. Zibaii, H. Latifi, Manuel Marques, Hartmut Bartelt, Orlando Frazão

Proceedings Volume 9634, 96343I (2015) https://doi.org/10.1117/12.2194978

KEYWORDS: Fiber Bragg gratings, Ion beams, Refractive index, Bioalcohols, Sensors, Structured optical fibers, Scanning electron microscopy, Modulation, Silica, Temperature metrology

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Proceedings Article | 28 September 2015 Paper

Acetone evaporation monitoring using a caterpillar-like microstructured fiber

A. Gomes, M. Ferreira, J. Moura, R. André, S. Silva, J. Kobelke, J. Bierlich, K. Wondraczek, K. Schuster, O. Frazão

Proceedings Volume 9634, 96342R (2015) https://doi.org/10.1117/12.2194932

KEYWORDS: Sensors, Head, Liquids, Microfluidics, Micro optical fluidics, Signal processing, Single mode fibers, Structured optical fibers, Ion beams, Signal detection

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Proceedings Article | 28 September 2015 Paper

Measuring strain at extreme temperatures with a Fabry-Perot optical fiber sensor

Marta Ferreira, Paulo Roriz, Jörg Bierlich, Jens Kobelke, Katrin Wondraczek, Claudia Aichele, Kay Schuster, José Santos, Orlando Frazão

Proceedings Volume 9634, 96343P (2015) https://doi.org/10.1117/12.2194513

KEYWORDS: Temperature metrology, Silica, Sensors, Fabry–Perot interferometers, Single mode fibers, Annealing, Fiber optics sensors, Head, Cladding, Optical fibers

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Proceedings Article | 28 September 2015 Paper

In-fiber Michelson interferometer inclinometer

C. da Silveira, P. Jorge, J. Costa, M. Giraldi, J. Santos, O. Frazão

Proceedings Volume 9634, 96341W (2015) https://doi.org/10.1117/12.2195392

KEYWORDS: Visibility, Michelson interferometers, Sensors, Fringe analysis, Cladding, Refractive index, Interferometers, Head, Capillaries, Temperature metrology

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Proceedings Article | 28 September 2015 Paper

A fiber optic buckle transducer for measurement of in vitro tendon strain

Paulo Roriz, António Ramos, Manuel Marques, José Simões, Orlando Frazão

Proceedings Volume 9634, 96342Q (2015) https://doi.org/10.1117/12.2195249

KEYWORDS: Fiber Bragg gratings, Transducers, Fiber optics tests, Fiber optics, Finite element methods, Sensors, Seaborgium, In vitro testing, Prototyping, Bone

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Proceedings Article | 28 September 2015 Paper

Fiber optic sensing system for temperature and gas monitoring in coal waste pile combustion environments

D. Viveiros, J. Ribeiro, J. Ferreira, A. Lopez-Albada, A. Pinto, R. Perez-Herrera, S. Diaz, A. Lopez-Gil, A. Dominguez-Lopez, O. Esteban, S. Martin-Lopez, J.-L. Auguste, R. Jamier, S. Rougier, S. Silva, O. Frazão, J. Santos, D. Flores, P. Roy, M. Gonzalez-Herraez, M. Lopez-Amo, J. Baptista

Proceedings Volume 9634, 96343Y (2015) https://doi.org/10.1117/12.2195088

KEYWORDS: Temperature metrology, Combustion, Sensing systems, Fiber optics sensors, Optical fibers, Data modeling, Environmental sensing, Prototyping, Environmental monitoring, Methane

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Proceedings Article | 28 September 2015 Paper

Curvature sensing using an added-signal in a fiber optic cavity ring-down system

Susana Silva, P. Biswas, S. Bandyopadhyay, P. Jorge, M. Marques, O. Frazão

Proceedings Volume 9634, 96341G (2015) https://doi.org/10.1117/12.2194785

KEYWORDS: Fiber optics, Signal processing, Sensing systems, Carbon dioxide lasers, Optical fibers, Signal attenuation, Sensors, Reflectometry, Modulation, Fiber couplers

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Proceedings Article | 28 September 2015 Paper

Centre of mass determination based on an optical weighing machine using fiber Bragg gratings

Rui Oliveira, Paulo Roriz, Manuel Marques, Orlando Frazão

Proceedings Volume 9634, 96347H (2015) https://doi.org/10.1117/12.2195151

KEYWORDS: Fiber Bragg gratings, Calibration, Sensors, Bone, Cameras, Signal processing, LabVIEW, Astronomical imaging, Physics, Astronomy

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Proceedings Article | 22 August 2014 Paper

Remote curvature fiber sensors using core mismatch structures and OTDR based interrogation

Cindy Fernandes, Maria Thereza Rocco Giraldi, Carlos Gouveia, Marco de Sousa, João C. W. A. Costa, Orlando Frazão, Pedro Jorge

Proceedings Volume 9286, 928646 (2014) https://doi.org/10.1117/12.2063008

KEYWORDS: Sensors, Signal attenuation, Remote sensing, Fiber optics sensors, Single mode fibers, Structured optical fibers, Code division multiplexing, Temperature metrology, Multimode fibers, Optical sensors

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Proceedings Article | 22 August 2014 Paper

Fluid evaporation monitoring with suspended-core fibers

J. Moura, H. Baierl, J.-L. Auguste, R. Jamier, P. Roy, J. Santos, O. Frazão

Proceedings Volume 9286, 92863Y (2014) https://doi.org/10.1117/12.2063835

KEYWORDS: Optical fibers, Sensors, Head, Single mode fibers, Liquids, Cladding, Photonics, Signal processing, Bioalcohols, Spectrum analysis

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Proceedings Article | 22 August 2014 Paper

Gas sensing using wavelength modulation spectroscopy

D. Viveiros, J. Ribeiro, D. Flores, J. Ferreira, O. Frazao, J. Santos, J. Baptista

Proceedings Volume 9286, 92863U (2014) https://doi.org/10.1117/12.2063811

KEYWORDS: Modulation, Geometrical optics, Absorption, Head, Carbon dioxide lasers, Carbon dioxide, Spectroscopy, Sensors, Methane, Optical amplifiers

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SPIE Journal Paper | 19 August 2014

Detection of evaporation process of acetone with a microstructured fiber in a reflective configuration

Susana Silva, Jean-Louis Auguste, Raphael Jamier, Sébastien Rougier, Jose Baptista, Jose Santos, Philippe Roy, Orlando Frazão

OE, Vol. 53, Issue 08, 080501, (August 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.8.080501

KEYWORDS: Silica, Sensors, Liquids, Refractive index, Single mode fibers, Micro optical fluidics, Head, Interferometers, Reflectivity, Structured optical fibers

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Proceedings Article | 2 June 2014 Paper

Simultaneous strain and temperature measure based on a single suspended core photonic crystal fiber

S. Rota-Rodrigo, M. López-Amo, J. Kobelke, K. Schuster, J. Santos, O. Frazão

Proceedings Volume 9157, 915721 (2014) https://doi.org/10.1117/12.2059019

KEYWORDS: Sensors, Temperature metrology, Single mode fibers, Head, Photonic crystal fibers, Optical filters, Linear filtering, Fiber optics sensors, Fringe analysis, Temperature sensors

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Proceedings Article | 2 June 2014 Paper

Cavity ring-down with OTDR for remote sensing

D. Passos, S. Silva, M. Marques, O. Frazão

Proceedings Volume 9157, 91570G (2014) https://doi.org/10.1117/12.2057971

KEYWORDS: Remote sensing, Sensors, Optical fibers, Refractive index, Oscilloscopes, Chemical analysis, Biosensing, Optical gas detection, Liquids, Biological detection systems

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Proceedings Article | 2 June 2014 Paper

Control of the strain sensitivity using a suspended core photonic crystal fiber sensing head

S. Rota-Rodrigo, M. Lopez-Amo, J. Kobelke, K. Schuster, J. Santos, O. Frazão

Proceedings Volume 9157, 91571Y (2014) https://doi.org/10.1117/12.2055081

KEYWORDS: Sensors, Head, Single mode fibers, Photonic crystal fibers, Fiber optics sensors, Silica, Optical fibers, Neodymium, Photonic crystal devices, Photonic crystals

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Proceedings Article | 2 June 2014 Paper

Fiber taper combined with magnetic fluid for magnetic field

A. Layeghi, H. Latifi, O. Frazão

Proceedings Volume 9157, 91570Z (2014) https://doi.org/10.1117/12.2059070

KEYWORDS: Magnetism, Magnetic sensors, Sensors, Nanoparticles, Cladding, Optical fibers, Tapered optical fibers, Particles, Fiber Bragg gratings, Transmission electron microscopy

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Proceedings Article | 2 June 2014 Paper

Multiparameter measurement using a double-Y-shaped suspended-core fiber in a fiber loop configuration

S. Silva, H. Baierl, J.-L. Auguste, R. Jamier, P. Roy, J. Baptista, J. Santos, O. Frazão

Proceedings Volume 9157, 915710 (2014) https://doi.org/10.1117/12.2059115

KEYWORDS: Sensors, Fiber optics sensors, Birefringence, Mirrors, Optical fibers, Head, Structured optical fibers, Polarization, Photonics, Interferometers

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Proceedings Article | 2 June 2014 Paper

Optical fiber Fabry-Pérot sensor fabrication based on focused ion beam post-processing

Ricardo Andre, Simon Pevec, Martin Becker, Jan Dellith, Manfred Rothhardt, Manuel Marques, Denis Donlagic, Hartmut Bartelt, Orlando Frazão

Proceedings Volume 9157, 91577T (2014) https://doi.org/10.1117/12.2059175

KEYWORDS: Sensors, Ion beams, Etching, Optical fibers, Structured optical fibers, Silica, Scanning electron microscopy, Glasses, Wet etching, Fiber optics sensors

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Proceedings Article | 2 June 2014 Paper

Interrogation system for fiber loop mirror sensors using OTDR

Maria Thereza Rocco Giraldi, Cindy Fernandes, Marta Ferreira, João C. Costa, José Santos, Orlando Frazão

Proceedings Volume 9157, 915760 (2014) https://doi.org/10.1117/12.2059191

KEYWORDS: Sensors, Mirrors, Multiplexing, Signal attenuation, Fiber optics sensors, Remote sensing, Optical fibers, Fiber Bragg gratings, Single mode fibers, Reflectometry

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Proceedings Article | 2 June 2014 Paper

In-line Mach-Zehnder interferometer based on a dissimilar-doping dual-core fiber for high sensitivity strain and temperature sensing

H, Martins, J. Bierlich, K. Wondraczek, S. Unger, J. Kobelke, K. Schuster, M. Marques, M. Gonzalez-Herraez, O. Frazão

Proceedings Volume 9157, 91572C (2014) https://doi.org/10.1117/12.2059555

KEYWORDS: Interferometers, Temperature metrology, Mach-Zehnder interferometers, Germanium, Refractive index, Sensors, Phosphorus, Single mode fibers, Fiber optics sensors, Temperature sensors

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Proceedings Article | 2 June 2014 Paper

New silica microspheres array sensor

Marta Ferreira, José Santos, Orlando Frazão

Proceedings Volume 9157, 91571P (2014) https://doi.org/10.1117/12.2059619

KEYWORDS: Sensors, Head, Silica, Single mode fibers, Refractive index, Fiber optics sensors, Visibility, Carbon dioxide lasers, Microscopes, Photography

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Proceedings Article | 2 June 2014 Paper

Fabry-Perot cavity hydrostatic pressure sensors

L. Carvalho, P. Roriz, J. Simões, J. Santos, O. Frazão

Proceedings Volume 9157, 91571U (2014) https://doi.org/10.1117/12.2059703

KEYWORDS: Sensors, Silicon, Optical resonators, Fabry–Perot interferometers, Optical fibers, Adhesives, Fiber optics sensors, Polymers, Single mode fibers, Biomedical optics

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Proceedings Article | 2 June 2014 Paper

Intradiscal pressure variation under spontaneous ventilation

Paulo Roriz, J. Ferreira, J. Potes, M. Oliveira, J. Santos, J. Simões, O. Frazão

Proceedings Volume 9157, 91575D (2014) https://doi.org/10.1117/12.2059759

KEYWORDS: Sensors, Spine, In vivo imaging, Fiber optics sensors, Calibration, Heart, Dielectrophoresis, Fiber optics, Head, Optical fibers

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Proceedings Article | 2 June 2014 Paper

Characterization of a hybrid Fabry-Perot Cavity based on a four-bridge double-Y-shape-core microstructured fiber

A. M. Pinto, A. Lopez-Aldaba, M. Lopez-Amo, O. Frazão, J. Santos, J. Baptista, H. Baierl, J.-L. Auguste, R. Jamier, P. Roy

Proceedings Volume 9157, 91577O (2014) https://doi.org/10.1117/12.2059072

KEYWORDS: Fabry–Perot interferometers, Micro optical fluidics, Fabry–Perot interferometry, Polarization, Sensors, Temperature metrology, Single mode fibers, L band, Structured optical fibers, Fiber optics sensors

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Proceedings Article | 2 June 2014 Paper

Comparison of the use of first and second-order Raman amplification to assist a phase-sensitive optical time domain reflectometer in distributed vibration sensing over 125 km

H. Martins, S. Martin-Lopez, M. Filograno, P. Corredera, O. Frazão, M. Gonzalez-Herraez

Proceedings Volume 9157, 91576K (2014) https://doi.org/10.1117/12.2059483

KEYWORDS: Raman spectroscopy, Sensors, Reflectometry, Signal to noise ratio, Vibrometry, Fiber Bragg gratings, Visibility, Optical amplifiers, Tunable filters, Photodetectors

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SPIE Journal Paper | 31 March 2014 Open Access

In vivo measurement of the pressure signal in the intervertebral disc of an anesthetized sheep

João Ferreira, Jose Potes, Maria Oliveira, Orlando Frazão, José Luís Campos Oliveira Santos, Jose Simoes, Paulo Roriz

JBO, Vol. 19, Issue 03, 037006, (March 2014) https://doi.org/10.1117/12.10.1117/1.JBO.19.3.037006

KEYWORDS: Sensors, In vivo imaging, Calibration, Fiber optics sensors, Spine, Sensor calibration, Atrial fibrillation, Data modeling, Fiber optics, Head

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SPIE Journal Paper | 19 December 2013

Design and characterization of a wearable macrobending fiber optic sensor for human joint angle determination

Ana Silva, Andre Catarino, Miguel Correia, Orlando Frazão

OE, Vol. 52, Issue 12, 126106, (December 2013) https://doi.org/10.1117/12.10.1117/1.OE.52.12.126106

KEYWORDS: Sensors, Fiber optics sensors, Optical fibers, Head, Optical engineering, Standards development, Signal attenuation, Single mode fibers, Optical testing, Optical design

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Proceedings Article | 18 November 2013 Paper

Monitoring of non-homogeneous strains in wood glued joints with embedded FBG optical sensors in mode I delamination tests

R. Maciel, O. Frazão, J. J. Morais, J. R. Fernandes

Proceedings Volume 8785, 8785FQ (2013) https://doi.org/10.1117/12.2031893

KEYWORDS: Fiber Bragg gratings, Sensors, Refractive index, Optical sensors, Epoxies, Data modeling, Adhesives, Electro optical modeling, Fiber optics sensors, Reflectivity

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Proceedings Article | 18 November 2013 Paper

Figure-of-eight cavity fiber laser based torsion sensor

M. Ferreira, J. Santos, P. Mergo, O. Frazão

Proceedings Volume 8785, 8785FB (2013) https://doi.org/10.1117/12.2027506

KEYWORDS: Fiber lasers, Optical filters, Sensors, Interferometry, Photonic crystal fibers, Polarization, Head, Active sensors, Mirrors, Laser optics

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SPIE Journal Paper | 8 July 2013

High birefringence triangular optical nanowire in suspended-core fiber for temperature sensing

Ricardo Andre, Martin Becker, Kay Schuster, Manfred Rothhardt, Hartmut Bartelt, Manuel Marques, Orlando Frazão

JNP, Vol. 7, Issue 01, 073088, (July 2013) https://doi.org/10.1117/12.10.1117/1.JNP.7.073088

KEYWORDS: Birefringence, Sagnac interferometers, Optical fibers, Sensors, Polarization, Silica, Structured optical fibers, Single mode fibers, Cladding, Nanowires

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SPIE Journal Paper | 30 May 2013 Open Access

Review of fiber-optic pressure sensors for biomedical and biomechanical applications

Paulo Roriz, Orlando Frazão, Antonio Lobo-Ribeiro, José Santos, Jose Simoes

JBO, Vol. 18, Issue 05, 050903, (May 2013) https://doi.org/10.1117/12.10.1117/1.JBO.18.5.050903

KEYWORDS: Sensors, Fiber optics sensors, Fiber Bragg gratings, Biomedical optics, Fiber optics, In vivo imaging, Free space optics, Transducers, Temperature metrology, Silicon

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Proceedings Article | 20 May 2013 Paper

Optical inclinometer based on phase-shifted Bragg grating in a taper configuration

João Moura, S. Silva, M. Becker, M. Rothardt, H. Bartelt, O. Frazão

Proceedings Volume 8794, 87940D (2013) https://doi.org/10.1117/12.2026706

KEYWORDS: Fiber Bragg gratings, Head, Fabrication, Phase shifts, Deep ultraviolet, Femtosecond phenomena, Sensors, Optical fibers, Optical filters, Semiconductor lasers

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Proceedings Article | 20 May 2013 Paper

Pressure sensor based on an all-fiber Fabry-Pérot interferometer for different gaseous environments

Susana Silva, L. Coelho, O. Frazão

Proceedings Volume 8794, 87940H (2013) https://doi.org/10.1117/12.2025394

KEYWORDS: Single mode fibers, Sensors, Silica, Interferometers, Oxygen, Environmental sensing, Refractive index, Head, Optical fibers, Nitrogen

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Proceedings Article | 20 May 2013 Paper

HiBi triangular optical nanowire in suspended-core fiber for sensing applications

Ricardo Andre, Martin Becker, Kay Schuster, Manfred Rothhardt, Hartmut Bartelt, Manuel Marques, Orlando Frazão

Proceedings Volume 8794, 87940I (2013) https://doi.org/10.1117/12.2025404

KEYWORDS: Birefringence, Mirrors, Polarization, Interferometers, Spectrum analysis, Nanolithography, Optical fibers, Reflectivity, Temperature metrology, Nanowires

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Proceedings Article | 20 May 2013 Paper

Modulation instability-induced visibility fading in phase-sensitive OTDR

Hugo Martins, Sonia Martin-Lopez, Pedro Corredera, Pedro Salgado, Orlando Frazão, Miguel González-Herráez

Proceedings Volume 8794, 87943E (2013) https://doi.org/10.1117/12.2026062

KEYWORDS: Visibility, Modulation, Phase shift keying, Signal attenuation, Optical fibers, Scattering, Signal to noise ratio, Sensors, Visualization, Dispersion

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Proceedings Article | 20 May 2013 Paper

High visibility phase-sensitive optical time domain reflectometer for distributed sensing of ultrasonic waves

Hugo Martins, Sonia Martin-Lopez, Pedro Corredera, Massimo Filograno, Orlando Frazão, Miguel González-Herráez

Proceedings Volume 8794, 87943F (2013) https://doi.org/10.1117/12.2026081

KEYWORDS: Ultrasonics, Sensors, Vibrometry, Visibility, Reflectometry, Wave sensors, Signal attenuation, Signal to noise ratio, Sensing systems, Fiber optics sensors

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Proceedings Article | 20 May 2013 Paper

Parallel Fabry-Pérot interferometer in suspended twin-core fiber

Ricardo André, Jens Kobelke, Kay Schuster, Hartmut Bartelt, Manuel Marques, Orlando Frazão

Proceedings Volume 8794, 87940Z (2013) https://doi.org/10.1117/12.2026778

KEYWORDS: Head, Single mode fibers, Interferometers, Visibility, Sensors, Bridges, Fiber optics sensors, Temperature sensors, Photonic crystal fibers, Neodymium

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Proceedings Article | 20 May 2013 Paper

Microcavity tip temperature sensor based on post-processing

Marta Ferreira, Jörg Bierlich, Kay Schuster, José Santos, Orlando Frazão

Proceedings Volume 8794, 87942E (2013) https://doi.org/10.1117/12.2026105

KEYWORDS: Optical fibers, Cladding, Optical microcavities, Head, Silica, Etching, Sensors, Temperature sensors, Wet etching, Temperature metrology

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Proceedings Article | 20 May 2013 Paper

Simplified sensor design for temperature-strain discrimination using fiber Bragg gratings embedded in laminated composites

L. Rodriguez-Cobo, A. Marques, J.M. Lopez-Higuera, J. Santos, O. Frazão

Proceedings Volume 8794, 87942W (2013) https://doi.org/10.1117/12.2026524

KEYWORDS: Fiber Bragg gratings, Composites, Sensors, Carbon, Optical design, Structured optical fibers, Manufacturing, Optics manufacturing, Temperature metrology, Finite element methods

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SPIE Journal Paper | 21 January 2013 Open Access

Large range linear torsion sensor based on a suspended-core fiber loop mirror

Ricardo Andre, Manuel Marques, Orlando Frazão, Pawel Mergo

OE, Vol. 52, Issue 2, 020501, (January 2013) https://doi.org/10.1117/12.10.1117/1.OE.52.2.020501

KEYWORDS: Birefringence, Sensors, Mirrors, Temperature metrology, Polarization, Optics manufacturing, Single mode fibers, Fiber optics sensors, Optical sensing, Visibility

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Proceedings Article | 7 November 2012 Paper

Sensing characteristics of tapered high-birefringent optical fiber

A. Layeghi, M. Zibaii, J. Sadeghi, O. Frazao, P. A. Jorge, H. Latifi

Proceedings Volume 8421, 84217O (2012) https://doi.org/10.1117/12.968581

KEYWORDS: Birefringence, Temperature metrology, Sensors, Optical fibers, Carbon dioxide lasers, Refractive index, Mirrors, Interferometers, Polarization, Fiber optics sensors

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Proceedings Article | 7 November 2012 Paper

Simultaneous measurement of strain and temperature based on clover microstructured fiber loop mirror

R. Perez-Herrera, R. André, S. Silva, M. Becker, K. Schuster, J. Kobelke, M. Lopez-Amo, J. Santos, O. Frazão

Proceedings Volume 8421, 84216W (2012) https://doi.org/10.1117/12.968585

KEYWORDS: Mirrors, Temperature metrology, Sensors, Structured optical fibers, Polarization, Birefringence, Silica, Head, Fiber optics sensors, Interferometers

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Proceedings Article | 17 October 2012 Paper

Temperature-independent pressure sensor using triangular-shape of suspended-core fiber

M. Zibaii, S. Nouri, J. Sadeghi, H. Latifi, P. A. Jorge, K. Schuster, Jens Kobelke, O. Frazao

Proceedings Volume 8421, 84210Z (2012) https://doi.org/10.1117/12.966321

KEYWORDS: Sensors, Head, Single mode fibers, Temperature metrology, Structured optical fibers, Cladding, Fiber optics sensors, Micro optical fluidics, Transducers, Fiber Bragg gratings

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Proceedings Article | 17 October 2012 Paper

Multimode interference in tapered single mode-multimode-single mode fiber structures for strain sensing applications

Ricardo André, Claudecir Biazoli, Susana Silva, Manuel Marques, Cristiano M. Cordeiro, Orlando Frazão

Proceedings Volume 8421, 84213B (2012) https://doi.org/10.1117/12.975167

KEYWORDS: Structured optical fibers, Single mode fibers, Multimode fibers, Brain-machine interfaces, Structural sensing, Temperature metrology, Head, Fiber optics sensors, Optical fibers, Beam propagation method

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Proceedings Article | 17 October 2012 Paper

Interrogation system based on "figure-of-eight" fiber loop mirror

Ricardo Silva, A. Layeghi, M. Zibaii, H. Latifi, J. Santos, A. B. Lobo Ribeiro, O. Frazão

Proceedings Volume 8421, 84212X (2012) https://doi.org/10.1117/12.970475

KEYWORDS: Sensors, Mirrors, Fiber couplers, Modulation, Fiber optics sensors, Interferometers, Phase measurement, Polarization, Beam splitters, Birefringence

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Proceedings Article | 17 October 2012 Paper

Magnetic field sensor with Terfenol-D thin-film coated FBG

Ricardo Silva, G. Chesini, C. Gouveia, A. Lobo Ribeiro, O. Frazão, C. M. Cordeiro, P. A. Jorge

Proceedings Volume 8421, 84213C (2012) https://doi.org/10.1117/12.975169

KEYWORDS: Fiber Bragg gratings, Magnetism, Magnetic sensors, Sensors, Thin films, Temperature metrology, Laser systems engineering, Fiber optics sensors, Head, Optical scanning systems

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Proceedings Article | 17 October 2012 Paper

Simultaneous measurement of partial pressure of O2 and CO2 using hybrid interferometer

Paula Tafulo, L. Coelho, P. Jorge, J. Santos, Kay Schuster, Jens Kobelke, O. Frazão

Proceedings Volume 8421, 84212W (2012) https://doi.org/10.1117/12.970474

KEYWORDS: Interferometers, Carbon dioxide, Head, Sensors, Oxygen, Silica, Single mode fibers, Fabry–Perot interferometers, Refractive index, Carbon monoxide

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Proceedings Article | 17 October 2012 Paper

New spatial optical filters for gas refractometry

Susana Silva, L. Coelho, R. André, O. Frazão

Proceedings Volume 8421, 842137 (2012) https://doi.org/10.1117/12.974991

KEYWORDS: Optical filters, Bandpass filters, Head, Optical fibers, Structured optical fibers, Refractive index, Refractometry, Silica, Cladding, Nitrogen

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Proceedings Article | 9 May 2012 Paper

A novel highly birefringent fiber loop mirror sensor based on a 3×3 coupler

R. M. Silva, A. B. Lobo Ribeiro, J. Santos, O. Frazão

Proceedings Volume 8439, 84390L (2012) https://doi.org/10.1117/12.922827

KEYWORDS: Sensors, Head, Polarization, Mirrors, Fiber couplers, Fiber optics sensors, Optical sensing, Fiber optics, Temperature metrology, Remote sensing

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Proceedings Article | 9 May 2012 Paper

DFB laser based electrical dynamic interrogation for optical fiber sensors

J. Carvalho, O. Frazão, J. Baptista, J. Santos, A. Barbero

Proceedings Volume 8439, 84390K (2012) https://doi.org/10.1117/12.922691

KEYWORDS: Modulation, Refractive index, Multiplexing, Fiber optics sensors, Photodetectors, Fiber lasers, Sensors, Signal detection, Head, Cladding

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Proceedings Article | 5 May 2012 Paper

Multimode interference as a tool for fiber sensing

J. Santos, Susana Silva, L. Ferreira, F. Araújo, O. Frazão

Proceedings Volume 8370, 83700B (2012) https://doi.org/10.1117/12.919974

KEYWORDS: Interferometers, Refractive index, Cladding, Interferometry, Structured optical fibers, Sensors, Fiber optics sensors, Mach-Zehnder interferometers, Optical fibers, Phase shifts

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Proceedings Article | 26 April 2012 Paper

Intensity curvature sensor based on photonic crystal fiber with three coupled cores

H. Martins, Manuel Marques, Pedro Jorge, Cristiano Cordeiro, Orlando Frazão

Proceedings Volume 8426, 84260F (2012) https://doi.org/10.1117/12.922784

KEYWORDS: Sensors, Photonic crystal fibers, Head, Single mode fibers, Light, Fiber optics sensors, Fabrication, Control systems, Optical properties, Dispersion

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Proceedings Article | 26 April 2012 Paper

Strain characterization of suspended-core fiber tapers

Ricardo André, Susana Silva, Martin Becker, Kay Schuster, M. Rothhardt, H. Bartelt, Manuel Marques, Orlando Frazão

Proceedings Volume 8426, 84260G (2012) https://doi.org/10.1117/12.922812

KEYWORDS: Sensors, Cladding, Structured optical fibers, Fiber characterization, Refractive index, Single mode fibers, Head, Multimode fibers, Interferometers, Liquids

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SPIE Journal Paper | 1 October 2011

Optical refractometer based on multimode interference in a pure silica tube

Luís Coelho, Orlando Frazão, Jens Kobelke, Kay Schuster, José Santos

OE, Vol. 50, Issue 10, 100504, (October 2011) https://doi.org/10.1117/12.10.1117/1.3646393

KEYWORDS: Silica, Refractive index, Head, Single mode fibers, Multimode fibers, Liquids, Waveguides, Sensors, Fusion splicing, Temperature metrology

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Proceedings Article | 26 July 2011 Paper

Torsion sensor based on a high-birefringent Sagnac loop interferometer

M. S. Ferreira, R. M. Silva, O. Frazão

Proceedings Volume 8001, 80013T (2011) https://doi.org/10.1117/12.890514

KEYWORDS: Head, Sensors, Interferometers, Polarization, Temperature metrology, Single mode fibers, Sagnac interferometers, Mechanical engineering, Fiber couplers, Fringe analysis

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Proceedings Article | 26 July 2011 Paper

Interferometric optical fiber inclinometer with dynamic FBG based interrogation

C. R. da Silveira, J. P. Carvalho, P. Jorge, J. W. A. Costa, M. T. R. Giraldi, J. L. Santos, E. L. Carvalho Júnior, D. O. Figueiredo, O. Frazão

Proceedings Volume 8001, 800145 (2011) https://doi.org/10.1117/12.892186

KEYWORDS: Fiber Bragg gratings, Sensors, Visibility, Michelson interferometers, Modulation, Interferometry, Optical fibers, Signal detection, Interferometers, Fusion splicing

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Proceedings Article | 26 July 2011 Paper

Optical fibre hydrogen sensors based on palladium coatings

L. Coelho, S. F. O. Silva, Paula Tafulo, J. Santos, O. Frazão, F. Malcata

Proceedings Volume 8001, 80013Z (2011) https://doi.org/10.1117/12.892014

KEYWORDS: Hydrogen, Palladium, Sensors, Head, Fiber Bragg gratings, Optical fibers, Fabry–Perot interferometers, Cladding, Interferometers, Fiber optics sensors

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Proceedings Article | 26 July 2011 Paper

Optical fibre pressure sensors for small scale studies of groundwater flow

L. Coelho, N. Freitas, J. Baptista, O. Frazão, J. Santos, T. Restivo, J. Marques

Proceedings Volume 8001, 80013V (2011) https://doi.org/10.1117/12.891913

KEYWORDS: Sensors, Mirrors, Optical fibers, Prototyping, Head, Reflectivity, GRIN lenses, Multiplexing, Soil science, Reflectometry

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Proceedings Article | 26 July 2011 Paper

A simple interrogation technique for refractive index measurement using multimode interference structure

Susana Silva, O. Frazão, J. L. Santos, F. X. Malcata

Proceedings Volume 8001, 80011I (2011) https://doi.org/10.1117/12.890150

KEYWORDS: Refractive index, Fiber Bragg gratings, Structured optical fibers, Single mode fibers, Multimode fibers, Reflection, Photodetectors, Sensors, Signal detection, Wavelength division multiplexing

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Proceedings Article | 26 July 2011 Paper

Controlling the sensitivity of a non-adiabatic tapered optical fiber for measuring the refractive index using all fiber Sagnac loop interferometer

M. Zibaii, P. A. S. Jorge, O. Frazão, H. Latifi

Proceedings Volume 8001, 800144 (2011) https://doi.org/10.1117/12.892102

KEYWORDS: Sensors, Interferometers, Refractive index, Cladding, Polarization, Fiber optics sensors, Tapered optical fibers, Environmental sensing, Interferometry, Optical fibers

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Proceedings Article | 26 July 2011 Paper

Modal interferometric sensor based in a birefringent boron-doped microstructured fiber

G. Statkiewicz-Barabach, J. Carvalho, O. Frazão, J. Olszewski, P. Mergo, J. Santos, W. Urbanczyk

Proceedings Volume 8001, 80011K (2011) https://doi.org/10.1117/12.892472

KEYWORDS: Sensors, Interferometers, Temperature metrology, Modulation, Visibility, Interferometry, Micro optical fluidics, Measurement devices, Carbon dioxide lasers, Fiber optics sensors

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Proceedings Article | 26 July 2011 Paper

Brillouin Stokes comb generated in a distributed fiber Raman amplifier

Hugo Martins, Manuel Marques, Orlando Frazão

Proceedings Volume 8001, 80013X (2011) https://doi.org/10.1117/12.891935

KEYWORDS: Raman spectroscopy, Laser scattering, Fiber amplifiers, Signal to noise ratio, Mirrors, Rayleigh scattering, Quantum cascade lasers, Laser damage threshold, Geometrical optics, Optical amplifiers

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Proceedings Article | 26 July 2011 Paper

Fabry-Pérot cavities based on chemical etching for high temperature and strain sensing

Paula Tafulo, P. A. S. Jorge, J. L. Santos, O. Frazão

Proceedings Volume 8001, 800141 (2011) https://doi.org/10.1117/12.892090

KEYWORDS: Sensors, Fiber optics sensors, Wet etching, Silica, Multimode fibers, Germanium, Single mode fibers, Etching, Graded index fibers, Cladding

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Proceedings Article | 26 July 2011 Paper

Simultaneous measurement of strain and temperature using the FBG cladding modes based on a core misaligned splice

C. Gouveia, P. A. S. Jorge, J. M. Baptista, O. Frazão

Proceedings Volume 8001, 80013U (2011) https://doi.org/10.1117/12.891422

KEYWORDS: Cladding, Fiber Bragg gratings, Temperature metrology, Sensors, Head, Fiber optics, Fiber optics sensors, Fiber optics tests, Refractive index, Multiplexing

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Proceedings Article | 26 July 2011 Paper

Chirped Bragg grating Fabry-Perot interferometer for nanostrain measurement

R. M. Silva, M. S. Ferreira, O. Frazão

Proceedings Volume 8001, 800149 (2011) https://doi.org/10.1117/12.892520

KEYWORDS: Fiber Bragg gratings, Head, Interferometers, Fringe analysis, Laser optics, Fabry–Perot interferometry, Sensors, Photodetectors, Single mode fibers, Silver

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Proceedings Article | 19 May 2011 Paper

High-birefringent fiber loop mirror with an output port probe for sensing applications

Orlando Frazão, Ricardo Silva, José Santos

Proceedings Volume 7753, 77539T (2011) https://doi.org/10.1117/12.882697

KEYWORDS: Mirrors, Refractive index, Sensors, Liquids, Remote sensing, Head, Fiber optics sensors, Polarization, Temperature metrology, Visibility

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Proceedings Article | 18 May 2011 Paper

Cladding modes FBG curvature sensor based on a core misaligned splice

C. Jesus, P. A. Jorge, J. Baptista, O. Frazão

Proceedings Volume 7753, 77538U (2011) https://doi.org/10.1117/12.886029

KEYWORDS: Fiber Bragg gratings, Cladding, Sensors, Head, Temperature metrology, Fiber optics sensors, Single mode fibers, Fiber optics, Reflectivity, Photodetectors

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Proceedings Article | 18 May 2011 Paper

Temperature-independent strain sensor based on four-wave mixing using Raman FBG laser sensor with cooperative Rayleigh scattering

Hugo Martins, Manuel Marques, Orlando Frazão

Proceedings Volume 7753, 77537A (2011) https://doi.org/10.1117/12.885219

KEYWORDS: Fiber Bragg gratings, Sensors, Raman spectroscopy, Rayleigh scattering, Laser scattering, Fiber lasers, Four wave mixing, Fiber optics sensors, Head, Temperature metrology

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Proceedings Article | 18 May 2011 Paper

Highly birefringent photonic bandgap Bragg fiber loop mirror for sensing applications

M. Ferreira, J. Baptista, P. Roy, R. Jamier, S. Février, O. Frazão

Proceedings Volume 7753, 77537L (2011) https://doi.org/10.1117/12.884953

KEYWORDS: Mirrors, Birefringence, Temperature metrology, Fiber optics sensors, Head, Sensors, Polarization, Interferometers, Optical sensing, Light

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Proceedings Article | 17 May 2011 Paper

Multimodal interference based on large-core air-clad photonic crystal fibres for simultaneous measurement of multiparameters

Susana Silva, J. Santos, F. X. Malcata, Jens Kobelke, Kay Schuster, O. Frazão

Proceedings Volume 7753, 77534A (2011) https://doi.org/10.1117/12.885999

KEYWORDS: Refractive index, Structural sensing, Head, Water, Photonic crystal fibers, Single mode fibers, Temperature metrology, Structured optical fibers, Sensors, Silica

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Proceedings Article | 17 May 2011 Paper

Sensing characteristics of birefringent microstructured polymer optical fiber

Marcin Szczurowski, Orlando Frazão, J. Baptista, Kristian Nielsen, Ole Bang, Wacław Urbańczyk

Proceedings Volume 7753, 77533Z (2011) https://doi.org/10.1117/12.885833

KEYWORDS: Birefringence, Polymer optical fibers, Polarimetry, Temperature metrology, Cladding, Polarization, Visible radiation, Phase shifts, Polymers, Fiber optics sensors

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SPIE Journal Paper | 1 March 2011 Open Access

Simultaneous measurement of three parameters using an all-fiber Mach-Zehnder interferometer based on suspended twin-core fibers

Susana Oliveira Silva, Orlando Frazão, José Santos, Jens Kobelke, Kay Schuster

OE, Vol. 50, Issue 03, 030501, (March 2011) https://doi.org/10.1117/12.10.1117/1.3553482

KEYWORDS: Optical fibers, Head, Polarization, Interferometry, Interferometers, Birefringence, Temperature metrology, Light wave propagation, Mach-Zehnder interferometers

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Proceedings Article | 14 October 2010 Paper

Multiwavelength Raman fiber laser based on a highly birefringent photonic crystal fiber loop mirror

Ana M. R. Pinto, O. Frazão, J. L. Santos, M. Lopez-Amo

Proceedings Volume 7839, 78391A (2010) https://doi.org/10.1117/12.866943

KEYWORDS: Raman spectroscopy, Fiber lasers, Mirrors, Photonic crystal fibers, Rayleigh scattering, Temperature metrology, Laser resonators, Dispersion, Environmental sensing, Optical filters

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Proceedings Article | 14 October 2010 Paper

All fibre Mach-Zehnder interferometer based on suspended twin-core fibre for simultaneous measurement of three parameters

O. Frazão, S. F. O. Silva, J. L. Santos, J. Kobelke, K. Schuster

Proceedings Volume 7839, 78391M (2010) https://doi.org/10.1117/12.867645

KEYWORDS: Mach-Zehnder interferometers, Head, Interferometry, Interferometers, Polarization, Birefringence, Optical fibers, Sensors, Light wave propagation, Temperature metrology

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Proceedings Article | 14 October 2010 Paper

Fibre optic modal interferometry for sensing applications

J. L. Santos, L. Ferreira, F. Araújo, O. Frazão

Proceedings Volume 7839, 78390Y (2010) https://doi.org/10.1117/12.868138

KEYWORDS: Interferometry, Optical fibers, Interferometers, Fiber optics, Radio propagation, Cladding, Sensors, Polarization, Photonic crystal fibers, Environmental sensing

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Proceedings Article | 14 October 2010 Paper

Simultaneous measurement of strain and temperature using modal interferometry in Bragg fibers

O. Frazão, L. M. N. Amaral, J. L. Santos, P. Roy, R. Jamier, S. Février

Proceedings Volume 7839, 783913 (2010) https://doi.org/10.1117/12.867447

KEYWORDS: Optical fibers, Interferometers, Temperature metrology, Interferometry, Head, Cladding, Refractive index, Sensors, Light wave propagation, Phase measurement

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