Prof. José Luís Campos Oliveira Santos Profile

Prof. José Luís Campos Oliveira Santos

Professor at Univ do Porto

SPIE Involvement:

Author | Editor | Student Chapter Advisor

Publications (134)

Proceedings Article | 3 October 2019 Paper

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 | 22 August 2017 Paper

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 | 16 May 2017 Paper

Paper

Low temperature oxidation in air of iron thin films monitored with long period fiber gratings

L. Coelho, J. L. Santos, P. A. S. Jorge, J. M. M. de Almeida

Proceedings Volume 10231, 102310Y (2017) https://doi.org/10.1117/12.2266324

KEYWORDS: Iron, Corrosion, Signal attenuation, Metals, Fiber optics sensors, Cladding, Oxides, Agriculture, Mining, Contamination, Oxidation, Thin films, Scanning electron microscopy, Electron microscopes, Sensors

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Proceedings Article | 23 April 2017 Paper

Paper

Study of corrosion using long period fiber gratings coated with iron exposed to salty water

L. Coelho, J. Santos, P. A. S. Jorge, J. M. M. de Almeida

Proceedings Volume 10323, 103234Z (2017) https://doi.org/10.1117/12.2266400

KEYWORDS: Iron, Corrosion, Sensors, Oxidation, Signal attenuation, Metals, Fiber coatings, Oxides, Sodium, Water

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Proceedings Article | 29 April 2016 Paper

Paper

Zinc oxide coated optical fiber long period gratings for sensing of volatile organic compounds

L. Coelho, D. Viegas, J. Santos, José Manuel Marques Martins de Almeida

Proceedings Volume 9899, 989918 (2016) https://doi.org/10.1117/12.2219630

KEYWORDS: Zinc oxide, Sensors, Bioalcohols, Thin films, Zinc, Fiber optics sensors, Gas sensors, Gases, Metals, Oxides, Signal attenuation, Silicon, X-ray diffraction, Glasses, Coating

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Proceedings Article | 28 September 2015 Paper

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

Paper

Phase interrogated plasmonic optical fiber optrode with bimetallic layers

H. Moayyed, I. Leite, L. Coelho, J. L. Santos, D. Viegas

Proceedings Volume 9634, 96346B (2015) https://doi.org/10.1117/12.2195090

KEYWORDS: Refractive index, Optical fibers, Plasmonics, Silver, Gold, Reflection, Sensors, Biological and chemical sensing, Sensing systems, Structural sensing

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Proceedings Article | 28 September 2015 Paper

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

Paper

Real time monitoring oxidation of transition metals with long period fiber gratings

L. Coelho, D. Viegas, J. Santos, J. de Almeida

Proceedings Volume 9634, 96340N (2015) https://doi.org/10.1117/12.2195199

KEYWORDS: Signal attenuation, Metals, Oxides, Transition metals, Coating, Copper, Nickel, Titanium, Zinc, Oxidation

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Proceedings Article | 28 September 2015 Paper

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 | 5 May 2015 Paper

Paper

Monitoring of high refractive index edible oils using coated long period fiber grating sensors

Luis Coelho, Diana Viegas, José Luís Campos Oliveira Santos, Jose Manuel de Almeida

Proceedings Volume 9506, 95061A (2015) https://doi.org/10.1117/12.2178811

KEYWORDS: Refractive index, Sensors, Cladding, Fiber optics sensors, Fiber coatings, Thin films, Coating, Spectrum analysis, Titanium dioxide, Oxidation

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Proceedings Article | 22 August 2014 Paper

Paper

Analysis of phase interrogated SPR fiber optic sensors with different bimetallic combinations

H. Moayyed, I. Leite, L. Coelho, J. Santos, A. Guerreiro, D. Viegas

Proceedings Volume 9286, 92864A (2014) https://doi.org/10.1117/12.2064315

KEYWORDS: Refractive index, Fiber optics sensors, Sensors, Metals, Silver, Gold, Plasmonics, Copper, Structural sensing, Aluminum

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Proceedings Article | 22 August 2014 Paper

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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Proceedings Article | 22 August 2014 Paper

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 | 2 June 2014 Paper

Paper

All-fiber sensor based on a metallic coated hybrid LPG-FBG structure for thermal characterization of materials

G. Silva, P. Caldas, J. Santos

Proceedings Volume 9157, 91571R (2014) https://doi.org/10.1117/12.2059655

KEYWORDS: Fiber Bragg gratings, Thin films, Temperature metrology, Sensors, Cladding, Titanium, Metals, Thermography, Optical fibers, Chromium

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Proceedings Article | 2 June 2014 Paper

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

Paper

Analysis of phase interrogation of SPR fiber optic sensors with characteristics tailored by the application of different metal-dielectric overlays

H. Moayyed, I. Leite, L. Coelho, J. Santos, A. Guerreiro, D. Viegas

Proceedings Volume 9157, 91575E (2014) https://doi.org/10.1117/12.2059768

KEYWORDS: Fiber optics sensors, Sensors, Refractive index, Oxides, Plasmonics, Silver, Optical fibers, Structural sensing, Fiber optics, Titanium dioxide

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Proceedings Article | 2 June 2014 Paper

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

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

Paper

Optical fiber refractive index sensor with reduced thermal sensitivity based on Superimposed Long-Period Gratings

G. Silva, P. Caldas, J. Santos

Proceedings Volume 9157, 91571S (2014) https://doi.org/10.1117/12.2059661

KEYWORDS: Sensors, Refractive index, Optical fibers, Cladding, Temperature metrology, Fiber optics sensors, Standards development, Fiber Bragg gratings, Temperature sensors, Modulation

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Proceedings Article | 2 June 2014 Paper

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

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

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

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

Paper

Reflection-based phase-shifted long-period fiber grating for cryogenic temperature measurements

R. Martins, J. Monteiro, P. Caldas, J. Santos, G. Rego

Proceedings Volume 9157, 91571K (2014) https://doi.org/10.1117/12.2059529

KEYWORDS: Fiber Bragg gratings, Cryogenics, Sensors, Temperature metrology, Signal attenuation, Cladding, Head, Structured optical fibers, Glasses, Polishing

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Proceedings Article | 2 June 2014 Paper

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

Paper

Fiber optic sensing system for monitoring of coal waste piles in combustion

D. Viveiros, J. Ribeiro, J. Carvalho, J. Ferreira, A. M. Pinto, R. Perez-Herrera, S. Diaz, A. Lopez-Gil, A. Dominguez-Lopez, O. Esteban, H. Martins, S. Martin-Lopez, H. Baierl, J.-L. Auguste, R. Jamier, S. Rougier, J. Santos, D. Flores, P. Roy, M. González-Herráez, M. López-Amo, J. Baptista

Proceedings Volume 9157, 91573O (2014) https://doi.org/10.1117/12.2059640

KEYWORDS: Combustion, Temperature metrology, Fiber optics sensors, Optical fibers, Mining, Gases, Methane, Pollution control, Sensing systems, Environmental sensing

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SPIE Journal Paper | 31 March 2014 Open Access

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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Proceedings Article | 3 March 2014 Paper

Paper

DNA-Aptamer optical biosensors based on a LPG-SPR optical fiber platform for point-of-care diagnostic

L. Coelho, R. Queirós, J. Santos, M. Cristina Martins, D. Viegas, P. A. Jorge

Proceedings Volume 8957, 89570K (2014) https://doi.org/10.1117/12.2040892

KEYWORDS: Sensors, Coating, Refractive index, Optical fibers, Cladding, Biosensors, Diagnostics, Proteins, Sodium, Titanium dioxide

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Proceedings Article | 18 November 2013 Paper

Paper

SPR sensing with bimetallic layers in optical fibers and phase interrogation

H. Moayyed, I. Leite, L. Coelho, J. Santos, D. Viegas

Proceedings Volume 8785, 8785FK (2013) https://doi.org/10.1117/12.2027614

KEYWORDS: Optical fibers, Sensors, Refractive index, Geometrical optics, Tapered optical fibers, Gold, Surface plasmons, Metals, Head, Interfaces

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Proceedings Article | 18 November 2013 Paper

Paper

Remote fiber sensors and optical amplification

M. Pontes, Thiago V. Coelho, Joel Carvalho, J. Santos, A. Guerreiro

Proceedings Volume 8785, 8785BZ (2013) https://doi.org/10.1117/12.2026191

KEYWORDS: Sensors, Remote sensing, Raman spectroscopy, Fiber Bragg gratings, Sensing systems, Refractive index, Head, Numerical modeling, Diffraction gratings, Signal attenuation

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Proceedings Article | 18 November 2013 Paper

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 | 30 May 2013 Open Access

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

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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Proceedings Article | 20 May 2013 Paper

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

Paper

Sensing structure based on surface plasmonic resonance in single mode optical fibers chemically etched

L. Coelho, J. Almeida, J. Santos, R. Ferreira, P. André, D. Viegas

Proceedings Volume 8794, 87940E (2013) https://doi.org/10.1117/12.2026809

KEYWORDS: Sensors, Refractive index, Dielectrics, Cladding, Gold, Biological and chemical sensing, Optical fibers, Single mode fibers, Plasmonics, Surface plasmons

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Proceedings Article | 20 May 2013 Paper

Paper

Analysis of phase interrogation in SPR-based sensing supported by tapered optical fibres

H. Moayyed, I. Leite, L. Coelho, J. Santos, D. Viegas

Proceedings Volume 8794, 879426 (2013) https://doi.org/10.1117/12.2026824

KEYWORDS: Sensors, Plasmonics, Optical fibers, Plasmons, Refractive index, Tapered optical fibers, Head, Metals, Near field optics, Gold

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Proceedings Article | 7 November 2012 Paper

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

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

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 | 9 May 2012 Paper

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

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 | 9 May 2012 Paper

Paper

Remote optical fiber sensor based on an LPG sensor head with Raman amplification optimized by numerical methods

Thiago Nogueira Coelho, Joel Carvalho, M. J. Pontes, J. Santos, A. Guerreiro

Proceedings Volume 8439, 84392A (2012) https://doi.org/10.1117/12.923002

KEYWORDS: Raman spectroscopy, Sensors, Fiber optics sensors, Fiber Bragg gratings, Optical fibers, Optical amplifiers, Head, Temperature metrology, Signal processing, Fiber amplifiers

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Proceedings Article | 9 May 2012 Paper

Paper

Optical time-domain reflectometer based multiplexed sensing scheme for environmental sensing

J. Carvalho, C. Gouveia, J. Santos, P. A. Jorge, J. Baptista

Proceedings Volume 8439, 84390B (2012) https://doi.org/10.1117/12.922975

KEYWORDS: Refractive index, Multiplexing, Temperature metrology, Environmental sensing, Reflectometry, Remote sensing, Head, Cladding, Signal detection, Fiber optics sensors

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Proceedings Article | 5 May 2012 Paper

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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SPIE Journal Paper | 1 December 2011

Development of an integrated narrowband tunable filter for LIDAR applications

Dionisio Alves Pereira, José Santos, Manuel Marques, Francisco Araújo, Luís Ferreira, Joao Carmo

OE, Vol. 50, Issue 12, 124403, (December 2011) https://doi.org/10.1117/12.10.1117/1.3656751

KEYWORDS: Fiber Bragg gratings, Ferroelectric materials, Optical filters, Aluminum, Actuators, LIDAR, Tunable filters, Absorption, Optical engineering, Absorption filters

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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

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

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

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

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

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

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 | 19 May 2011 Paper

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

Paper

Miniature fiber Bragg grating strain rosette based on lossless tapers

D. Viegas, M. Navarrete, N. Díaz-Herrera, A. González-Cano, J. Santos, F. Araújo

Proceedings Volume 7753, 775386 (2011) https://doi.org/10.1117/12.886073

KEYWORDS: Fiber Bragg gratings, Sensors, Fiber optics sensors, Image quality standards, Environmental sensing, Head, Manufacturing, Fiber optics, Electromagnetic interference, Civil engineering

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Proceedings Article | 17 May 2011 Paper

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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SPIE Journal Paper | 1 March 2011 Open Access

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

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

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

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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Proceedings Article | 14 October 2010 Paper

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 | 9 September 2010 Paper

Paper

Fibre laser sensor based on a phase-shifted chirped grating for acoustic sensing of partial discharges in power transformers

S. E. U. Lima, O. Frazão, R. Farias, F. Araújo, L. Ferreira, V. Miranda, J. Santos

Proceedings Volume 7653, 765335 (2010) https://doi.org/10.1117/12.865733

KEYWORDS: Sensors, Acoustics, Transformers, Fiber lasers, Head, Signal attenuation, Dielectrics, Acoustic emission, Transducers, Palladium

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Proceedings Article | 9 September 2010 Paper

Paper

Interrogation of microresonators using multimode fibers

P. Caldas, P. A. S. Jorge, F. Araújo, L. Ferreira, G. Rego, J. Santos, S. Berneschi, F. Cosi, S. Soria, S. Pelli, G. Nunzi Conti

Proceedings Volume 7653, 76532P (2010) https://doi.org/10.1117/12.866355

KEYWORDS: Multimode fibers, Scattering, Microresonators, Silica, Resonators, Light scattering, Optical fibers, Optical spheres, Sensing systems, Signal detection

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Proceedings Article | 9 September 2010 Paper

Paper

Fibre optic hot-wire flowmeter based on a metallic coated hybrid LPG-FBG structure

P. Caldas, P. A. S. Jorge, G. Rego, O. Frazão, J. L. Santos, L. A. Ferreira, F. Araújo

Proceedings Volume 7653, 76530B (2010) https://doi.org/10.1117/12.866463

KEYWORDS: Fiber Bragg gratings, Cladding, Semiconductor lasers, Sensors, Silver, Head, Absorption, Fiber optics, Optical fibers, Thin films

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Proceedings Article | 9 September 2010 Paper

Paper

Fibre optic remote sensing based on long period gratings with in situ optical source

D. Viegas, J. Carvalho, L. Coelho, J. Santos, L. Ferreira, F. Araújo, O. Frazão

Proceedings Volume 7653, 76532F (2010) https://doi.org/10.1117/12.866445

KEYWORDS: Sensors, Fiber Bragg gratings, Remote sensing, Head, Geometrical optics, Optical fibers, Sensing systems, Erbium, Fiber optics, In situ remote sensing

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Proceedings Article | 9 September 2010 Paper

Paper

Temperature- and strain-independent curvature sensor based on multimode interference

Susana Silva, O. Frazão, L. A. Ferreira, F. M. Araújo, F. X. Malcata, J. L. Santos

Proceedings Volume 7653, 76532A (2010) https://doi.org/10.1117/12.865028

KEYWORDS: Sensors, Structured optical fibers, Brain-machine interfaces, Temperature metrology, Multimode fibers, Structural sensing, Refractive index, Single mode fibers, Fiber optics, Optical sensing

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Proceedings Article | 9 September 2010 Paper

Paper

Acoustic source location of partial discharges in transformers

S. E. U. Lima, O. Frazão, R. Farias, F. Araújo, L. Ferreira, V. Miranda, J. Santos

Proceedings Volume 7653, 76532N (2010) https://doi.org/10.1117/12.866489

KEYWORDS: Sensors, Acoustics, Transformers, Particles, Global Positioning System, Particle swarm optimization, Acoustic emission, Signal detection, Algorithm development, Wave propagation

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Proceedings Article | 9 September 2010 Paper

Paper

All-fibre interferometric configurations based on suspended-core fibres for pressure measurement

S. H. Aref, M. I. Zibaii, M. Kheiri, H. Porbeyram, H. Latifi, O. Frazão, F. M. Araújo, L. A. Ferreira, J. L. Santos, Jens Kobelke, Kay Schuster

Proceedings Volume 7653, 76532G (2010) https://doi.org/10.1117/12.865817

KEYWORDS: Interferometry, Head, Sagnac interferometers, Sensors, Structured optical fibers, Birefringence, Temperature metrology, Fiber optics sensors, Interferometers, Silica

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Proceedings Article | 9 September 2010 Paper

Paper

Investigation of long term stability of arc-induced gratings heat treated at high temperatures

Gaspar Rego, Paulo Caldas, Oleg Ivanov, José Luís Santos

Proceedings Volume 7653, 76530G (2010) https://doi.org/10.1117/12.866359

KEYWORDS: Heat treatments, Cladding, Refractive index, Crystals, Diffusion, Annealing, Glasses, Fiber optics sensors, Temperature sensors, Silica

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Proceedings Article | 9 September 2010 Paper

Paper

Surface-plasmon-resonance sensor based on H-shaped optical fibre

Diana Viegas, Markus Hautakorpi, Ariel Guerreiro, José Luís Santos, Hanne Ludvigsen

Proceedings Volume 7653, 76532J (2010) https://doi.org/10.1117/12.866421

KEYWORDS: Sensors, Dielectrics, Optical fibers, Metals, Electromagnetism, Refractive index, Surface plasmons, Structured optical fibers, Fiber optics sensors, Titanium dioxide

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Proceedings Article | 9 September 2010 Paper

Paper

Optical inclinometer based on fibre-taper-modal Michelson interferometer

L. M. N. Amaral, O. Frazão, J. L. Santos, A. Lobo Ribeiro

Proceedings Volume 7653, 76530J (2010) https://doi.org/10.1117/12.866083

KEYWORDS: Interferometry, Interferometers, Michelson interferometers, Sensors, Fiber Bragg gratings, Phase interferometry, Cladding, Interfaces, Head, Fiber optics sensors

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Proceedings Article | 9 September 2010 Paper

Paper

Dynamic interrogation of long period gratings with modulated fibre Bragg gratings

J. Carvalho, L. Coelho, L. Correia, O. Frazão, P. A. S. Jorge, J. Baptista, I. Dias, J. Santos, J. Weyl, M. Pontes, M. Martinez, A. Barbero, R. Ribeiro, A. J. G. Abelém, M. T. R. Giraldi

Proceedings Volume 7653, 76532C (2010) https://doi.org/10.1117/12.866444

KEYWORDS: Fiber Bragg gratings, Modulation, Refractive index, Erbium, Head, Optical amplifiers, Raman spectroscopy, Fiber amplifiers, Electronics, Sensors

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Proceedings Article | 9 September 2010 Paper

Paper

Suspended-core Fabry-Perot temperature sensor interrogation through a dual wavelength Raman fiber laser

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

Proceedings Volume 7653, 765339 (2010) https://doi.org/10.1117/12.863540

KEYWORDS: Raman spectroscopy, Fabry–Perot interferometers, Fiber lasers, Fiber Bragg gratings, Temperature metrology, Interferometry, Mirrors, Micro optical fluidics, Single mode fibers, Fiber optics sensors

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Proceedings Article | 9 September 2010 Paper

Paper

Moving the wavelength detection range in surface plasmon resonance sensors based on tapered optical fibers

Natalia Díaz-Herrera, Agustin González-Cano, Diana Viegas, José Luis Santos, María-Cruz Navarrete, Óscar Esteban

Proceedings Volume 7653, 76531F (2010) https://doi.org/10.1117/12.866156

KEYWORDS: Sensors, Plasmons, Dielectrics, Indium nitride, Transducers, Aluminum, Refractive index, Fiber optics sensors, Tapered optical fibers, Titanium dioxide

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Proceedings Article | 14 May 2010 Paper

Paper

Sagnac interferometer based on a suspended twin-core fibre

O. Frazão, J. Baptista, J. Santos, Jens Kobelke, Kay Schuster

Proceedings Volume 7714, 77140V (2010) https://doi.org/10.1117/12.854285

KEYWORDS: Sagnac interferometers, Head, Refractive index, Temperature metrology, Birefringence, Sensors, Cladding, Polarization, Gyroscopes, Fiber Bragg gratings

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Proceedings Article | 14 May 2010 Paper

Paper

Sensing characteristics of long period gratings and rocking filters based on highly birefringent boron-doped photonic crystal fiber and fabricated by a CO2 laser

J. Carvalho, G. Statkiewicz-Barabach, A. Anuszkiewicz, J. Baptista, O. Frazão, J. Wojcik, J. Santos, W. Urbanczyk

Proceedings Volume 7714, 771403 (2010) https://doi.org/10.1117/12.854805

KEYWORDS: Optical filters, Carbon dioxide lasers, Photonic crystal fibers, Temperature metrology, Cladding, Boron, Refractive index, Signal attenuation, Polarization, Polarizers

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Proceedings Article | 14 May 2010 Paper

Paper

Bragg fibre for sensing applications

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

Proceedings Volume 7714, 771402 (2010) https://doi.org/10.1117/12.854391

KEYWORDS: Sensors, Interferometers, Refractive index, Optical sensing, Silica, Fiber optics sensors, Fringe analysis, Dispersion, Optical fibers, Fiber characterization

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Proceedings Article | 5 October 2009 Paper

Paper

Effect of fiber tapering in LPG-based Mach-Zehnder modal interferometers for refractive-index sensing

P. Caldas, P. A. Jorge, F. Araújo, L. Ferreira, G. Rego, J. Santos

Proceedings Volume 7503, 750349 (2009) https://doi.org/10.1117/12.834951

KEYWORDS: Refractive index, Interferometers, Mach-Zehnder interferometers, Cladding, Sensors, Optical fibers, Biosensing, Structured optical fibers, Structural sensing, Remote sensing

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Proceedings Article | 5 October 2009 Paper

Paper

Ultra-narrow band transmission filter using a phase-shift chirped fiber Bragg grating concatenated with a broadband rejection filter

D. Pereira, F. Araújo, L. Ferreira, M. Marques, J. Santos, J. Carmo

Proceedings Volume 7503, 75034A (2009) https://doi.org/10.1117/12.835432

KEYWORDS: Optical filters, Filtering (signal processing), Fiber Bragg gratings, Absorption, Manufacturing, Optical fabrication, LIDAR, Absorption filters, Carbon dioxide, Signal processing

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Proceedings Article | 5 October 2009 Paper

Paper

Non-terminal miniature fiber Bragg grating temperature probe based in U-shape lossless taper

D. Viegas, S. Abad, J. Santos, L. Ferreira, F. Araújo

Proceedings Volume 7503, 75033F (2009) https://doi.org/10.1117/12.835327

KEYWORDS: Fiber Bragg gratings, Sensors, Multiplexing, Manufacturing, Lead, Head, Fiber optics sensors, Temperature metrology, Temperature sensors, Silica

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Proceedings Article | 5 October 2009 Paper

Paper

Self-referencing model for electro-optical WDM fiber-optic intensity-based sensor network

D. Montero, C. Vázquez, J. Baptista, J. Santos

Proceedings Volume 7503, 75031R (2009) https://doi.org/10.1117/12.834232

KEYWORDS: Sensors, Fiber optics sensors, Remote sensing, Fiber optics, Modulation, Electro optics, Phase shifts, Electro optical modeling, Fiber Bragg gratings, Sensor networks

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Proceedings Article | 5 October 2009 Paper

Paper

Strain and temperature characterization of interferometric sensors based on ARROW fibers

S. Aref, O. Frazão, P. Caldas, L. Ferreira, F. Araújo, J. Santos, H. Latifi, J. Ballato, T. Her, F. Farahi

Proceedings Volume 7503, 75032Y (2009) https://doi.org/10.1117/12.834580

KEYWORDS: Optical fibers, Interferometry, Sensors, Head, Temperature metrology, Interferometers, Waveguides, Refractive index, Glasses, Cladding

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Proceedings Article | 5 October 2009 Paper

Paper

Fabry-Perot cavity sensing structure based on a suspended-core fibre

O. Frazão, J. Baptista, J. Santos, J. Kobelke, K. Schuster

Proceedings Volume 7503, 75032A (2009) https://doi.org/10.1117/12.834636

KEYWORDS: Refractive index, Sensors, Fabry–Perot interferometers, Structured optical fibers, Structural sensing, Head, Visibility, Single mode fibers, Temperature metrology, Water

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Proceedings Article | 5 October 2009 Paper

Paper

Sensing characteristics of hollow-core photonic crystal fibre modal interferometers

S. Aref, R. Amezcua-Correa, J. Carvalho, O. Frazão, P. Caldas, J. Santos, F. Araújo, H. Latifi, F. Farahi, L. Ferreira, J. Knight

Proceedings Volume 7503, 750339 (2009) https://doi.org/10.1117/12.834485

KEYWORDS: Interferometers, Photonic crystal fibers, Interferometry, Sensors, Head, Structured optical fibers, Fusion splicing, Structural sensing, Fermium, Frequency modulation

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Proceedings Article | 5 October 2009 Paper

Paper

Temperature independent torsion sensor based on modal interferometry in ultra high-birefringent photonic crystal fiber

Orlando Frazão, C. Jesus, José Baptista, José Santos, Philippe Roy

Proceedings Volume 7503, 75033K (2009) https://doi.org/10.1117/12.834745

KEYWORDS: Sensors, Interferometers, Photonic crystal fibers, Polarization, Head, Interferometry, Structured optical fibers, Temperature metrology, Fourier transforms, Fiber optics sensors

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Proceedings Article | 5 October 2009 Paper

Paper

Fibre Bragg gratings as interrogation elements for surface plasmon resonance sensors

N. Díaz-Herrera, D. Viegas, P. A. Jorge, M. Navarrete, L. Ferreira, F. Araújo, J. Santos, A. González-Cano

Proceedings Volume 7503, 75031B (2009) https://doi.org/10.1117/12.835100

KEYWORDS: Fiber Bragg gratings, Sensors, Refractive index, Chemical elements, Surface plasmons, Transmittance, Plasmons, Fiber optics sensors, Spectroscopy, Multiplexing

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Proceedings Article | 5 August 2009 Paper

Paper

Temperature and strain characterization of Bragg gratings impressed with femtosecond laser radiation in suspended-silica-core fibers

Luís Fernandes, Martin Becker, Orlando Frazão, Manfred Rothhardt, Sven Brückner, Kay Schuster, Jens Kobelke, José Santos, Paulo V. S. Marques

Proceedings Volume 7386, 73861N (2009) https://doi.org/10.1117/12.839641

KEYWORDS: Optical fibers, Fiber Bragg gratings, Femtosecond phenomena, Silica, Temperature metrology, Refractive index, Cladding, Germanium, Pulsed laser operation, Bridges

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SPIE Journal Paper | 1 February 2009

Extrinsic and intrinsic fiber optic interferometric sensors for acoustic detection in high-voltage environments

Sanderson Lima, Orlando Frazão, F. M. Araujo, L. A. Ferreira, Vladimiro Miranda, José Santos

OE, Vol. 48, Issue 02, 024401, (February 2009) https://doi.org/10.1117/12.10.1117/1.3080752

KEYWORDS: Sensors, Acoustics, Fiber optics sensors, Transformers, Interferometry, Fiber Bragg gratings, Head, Fiber optics, Optical engineering, Sensing systems

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Proceedings Article | 16 May 2008 Paper

Paper

Modal LPG-based Mach-Zehnder interferometer with controlled sensitivity for refractive index measurement

P. Caldas, P. A. Jorge, F. Araújo, L. Ferreira, G. Rego, J. Santos

Proceedings Volume 7004, 700448 (2008) https://doi.org/10.1117/12.786093

KEYWORDS: Refractive index, Interferometers, Cladding, Mach-Zehnder interferometers, Phase shifts, Optical fibers, Interferometry, Sensors, Structural sensing, Waveguides

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Proceedings Article | 16 May 2008 Paper

Paper

Curvature sensor based on a fibre loop mirror using a highly birefringent photonic crystal fibre with two asymmetric hole regions

O. Frazão, J. Baptista, J. Santos, P. Roy

Proceedings Volume 7004, 700447 (2008) https://doi.org/10.1117/12.786090

KEYWORDS: Sensors, Mirrors, Birefringence, Photonic crystal fibers, Optical fibers, Fiber Bragg gratings, Silica, Fiber optics sensors, Polarization, Interferometers

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Proceedings Article | 16 May 2008 Paper

Paper

Fibre Fabry-Perot sensor for acoustic detection

S. E. Lima, O. Frazão, F. Araújo, L. Ferreira, V. Miranda, J. Santos

Proceedings Volume 7004, 700441 (2008) https://doi.org/10.1117/12.786071

KEYWORDS: Acoustics, Sensors, Fiber Bragg gratings, Transformers, Fiber optics sensors, Interferometers, Head, Interferometry, Fabry–Perot interferometers, Homodyne detection

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Proceedings Article | 16 May 2008 Paper

Paper

Experimental results of antigliadin antibodies detection using long period fiber grating

J. Corres, I. Matias, J. Goicoechea, F. Arregui, D. Viegas, F. Araújo, J. Santos

Proceedings Volume 7004, 700442 (2008) https://doi.org/10.1117/12.786076

KEYWORDS: Sensors, Molecules, Refractive index, Biosensors, Silica, Refraction, Transducers, Fiber coatings, Fiber optics, Proteins

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Proceedings Article | 16 May 2008 Paper

Paper

Humidity sensor based on a long-period fiber grating coated with a SiO2-nanosphere film

D. Viegas, J. Goicoechea, J. Corres, J. Santos, L. Ferreira, F. Araújo, I. Matias

Proceedings Volume 7004, 70044O (2008) https://doi.org/10.1117/12.786059

KEYWORDS: Humidity, Sensors, Refractive index, Coating, Fiber coatings, Polymers, Silica, Water, Optical properties, Optical fibers

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Proceedings Article | 16 May 2008 Paper

Paper

Frequency modulated continuous wave technique for referencing and multiplexing intensity based fibre optic sensors

R. Perez-Herrera, D. Pereira, O. Frazão, J. Castro Ferreira, J. Santos, F. Araújo, L. Ferreira, J. Baptista, M. Lopez-Amo

Proceedings Volume 7004, 70044P (2008) https://doi.org/10.1117/12.786121

KEYWORDS: Sensors, Fiber Bragg gratings, Modulation, Multiplexing, Optical sensors, Fiber optics sensors, Optical fibers, Modulators, Single mode fibers, Signal generators

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Proceedings Article | 16 May 2008 Paper

Paper

Fibre refractometer based on a Fabry-Pérot interferometer

S. F. Silva, O. Frazão, P. Caldas, J. Santos, F. Araújo, L. Ferreira

Proceedings Volume 7004, 700446 (2008) https://doi.org/10.1117/12.786080

KEYWORDS: Refractive index, Liquids, Visibility, Interferometers, Fiber Bragg gratings, Water, Head, Interferometry, Fabry–Perot interferometry, Sensors

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SPIE Journal Paper | 1 May 2008

Optical fiber refractometer based on a Fabry-Pérot interferometer

Susana Silva, Orlando Frazão, Paulo Caldas, José Santos, F. M. Araujo, Luís Ferreira

OE, Vol. 47, Issue 05, 054403, (May 2008) https://doi.org/10.1117/12.10.1117/1.2931527

KEYWORDS: Refractive index, Interferometers, Liquids, Visibility, Fiber Bragg gratings, Optical fibers, Heterodyning, Interferometry, Water, Sensors

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SPIE Journal Paper | 1 April 2008

Fiber modal Michelson interferometers with coherence addressing and heterodyne interrogation

Paulo Caldas, Pedro Jorge, F. M. Araujo, Luís Ferreira, M. Marques, Gaspar Rego, José Santos

OE, Vol. 47, Issue 04, 044401, (April 2008) https://doi.org/10.1117/12.10.1117/1.2903089

KEYWORDS: Refractive index, Cladding, Interferometers, Michelson interferometers, Interferometry, Liquids, Sensing systems, Heterodyning, Single mode fibers, Head

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Proceedings Article | 2 July 2007 Paper

Paper

Study of LPG-assisted fibre modal Michelson interferometers with coherence addressing and heterodyne interrogation

P. Caldas, F. Araújo, L. Ferreira, G. Rego, M. Marques, J. Santos

Proceedings Volume 6619, 66192F (2007) https://doi.org/10.1117/12.738577

KEYWORDS: Cladding, Refractive index, Interferometers, Liquids, Silica, Phase shifts, Heterodyning, Sensing systems, Head, Michelson interferometers

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Proceedings Article | 2 July 2007 Paper

Paper

In-fibre Mach-Zehnder configuration based on fibre multimode interference structure combined with a long period grating

O. Frazão, J. Viegas, P. Caldas, F. Araújo, L. Ferreira, J. Santos, F. Farahi

Proceedings Volume 6619, 66192H (2007) https://doi.org/10.1117/12.738610

KEYWORDS: Structured optical fibers, Cladding, Interferometers, Multimode fibers, Mach-Zehnder interferometers, Sensors, Single mode fibers, Geometrical optics, Interferometry, Refractive index

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Proceedings Article | 2 July 2007 Paper

Paper

Temperature independent strain/load sensor using a highly birefringent photonic crystal fibre loop mirror

O. Frazão, L. Marques, J. Marques, J. Baptista, J. Santos

Proceedings Volume 6619, 66190Y (2007) https://doi.org/10.1117/12.738368

KEYWORDS: Sensors, Mirrors, Photonic crystal fibers, Polarization, Head, Optical fibers, Interferometers, Optical filters, Birefringence, Optical communications

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Proceedings Article | 2 July 2007 Paper

Paper

Simultaneous determination of oxygen and temperature using quantum dots and a ruthenium complex

P. A. S. Jorge, A. Silva, R. Benrashid, J. Santos, F. Farahi

Proceedings Volume 6619, 66191Y (2007) https://doi.org/10.1117/12.738432

KEYWORDS: Oxygen, Luminescence, Temperature metrology, Ruthenium, Sensors, Sol-gels, Quantum dots, Signal processing, Optical fibers, Sensor calibration

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Proceedings Article | 2 July 2007 Paper

Paper

Design and optimization of slotted multimode interference devices for chemical and biochemical sensing

M. Mayeh, J. Viegas, P. Marques, J. Santos, F. Farahi

Proceedings Volume 6619, 66191O (2007) https://doi.org/10.1117/12.738611

KEYWORDS: Refractive index, Brain-machine interfaces, Multimode interference devices, Sensors, Optical sensors, Biosensing, Biological and chemical sensing, Manufacturing, Molecules, Sol-gels

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Proceedings Article | 2 July 2007 Paper

Paper

Evaluation of coupling losses in hollow-core photonic crystal fibres

J. Carvalho, F. Magalhães, O. Ivanov, O. Frazão, F. Araújo, L. Ferreira, J. Santos

Proceedings Volume 6619, 66191V (2007) https://doi.org/10.1117/12.738662

KEYWORDS: Single mode fibers, Photonic crystal fibers, Cladding, Diffusion, Physics, Sensing systems, Optical fibers, Structured optical fibers, Solids, Sensors

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Proceedings Article | 2 July 2007 Paper

Paper

Modal interferometer based on a single non-adiabatic fibre taper

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

Proceedings Volume 6619, 66192G (2007) https://doi.org/10.1117/12.738582

KEYWORDS: Interferometers, Interferometry, Cladding, Structured optical fibers, Sensors, Phase interferometry, Michelson interferometers, Fiber optics, Optical fibers, Refractive index

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Proceedings Article | 16 May 2007 Paper

Paper

Fabrication and test of an integrated optical sensor with high sensitivity and high dynamic range based on a Mach-Zehnder interferometric configuration

D. Alexandre, J. Viegas, L. Fernandes, P. Moreira, A.M.P. Leite, J. Santos, P.V.S. Marques

Proceedings Volume 6585, 65850L (2007) https://doi.org/10.1117/12.722764

KEYWORDS: Waveguides, Refractive index, Fiber Bragg gratings, Interferometry, Water, Channel waveguides, Cladding, Ultraviolet radiation, Absorption, Sensors

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SPIE Journal Paper | 1 January 2007 Open Access

Open Access

Fiber ring laser sensor for strain-temperature discrimination based on four-wave mixing effect

Orlando Frazão, R. Morais, Jose Baptista, José Santos

OE, Vol. 46, Issue 01, 010502, (January 2007) https://doi.org/10.1117/12.10.1117/1.2406065

KEYWORDS: Sensors, Fiber lasers, Fiber Bragg gratings, Head, Fiber optics sensors, Four wave mixing, Condition numbers, Optical fibers, Temperature metrology, Nonlinear optics

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SPIE Journal Paper | 1 November 2005 Open Access

Open Access

Optical bend sensor based on a long-period fiber grating monitored by an optical time-domain reflectometer

Orlando Frazão, Rosane Falate, Jose Baptista, Jose Fabris, Jose Santos

OE, Vol. 44, Issue 11, 110502, (November 2005) https://doi.org/10.1117/12.10.1117/1.2123267

KEYWORDS: Sensors, Reflectometry, Temperature metrology, Multiplexing, Signal attenuation, Backscatter, Reflectivity, Structured optical fibers, Cladding, Spectrum analysis

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Proceedings Article | 23 May 2005 Paper

Paper

Strain and temperature discrimination using a Hi-Bi grating partially exposed to chemical etching

O. Frazao, D. Pereira, J. Santos, Francisco Araujo, L. Ferreira

Proceedings Volume 5855, (2005) https://doi.org/10.1117/12.623589

KEYWORDS: Fiber Bragg gratings, Head, Optical fibers, Cladding, Polarization, Wet etching, Etching, Temperature metrology, Birefringence, Structured optical fibers

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Proceedings Article | 23 May 2005 Paper

Paper

Self-referenced intensity based optical fiber temperature probes for luminescent chemical sensors using quantum dots

P. Jorge, M. Mayeh, R. Benrashid, P. Caldas, J. Santos, F. Farahi

Proceedings Volume 5855, (2005) https://doi.org/10.1117/12.623392

KEYWORDS: Temperature metrology, Luminescence, Optical fibers, Light emitting diodes, Sensors, Quantum dots, Optical filters, Chemical fiber sensors, Multiplexing, Thin films

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Proceedings Article | 23 May 2005 Paper

Paper

Short in-fibre Bragg grating structure for simultaneous measurement of strain and temperature

Orlando Frazao, M. Melo, R. Romero, P. Marques, Francisco Araujo, L. Ferreira, J. Santos

Proceedings Volume 5855, (2005) https://doi.org/10.1117/12.624282

KEYWORDS: Fiber Bragg gratings, Temperature metrology, Head, Reflectivity, Sensors, Optical fibers, Calibration, Erbium, Diffraction gratings, Diffraction

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Proceedings Article | 23 May 2005 Paper

Paper

Simultaneous temperature and strain measurement based on arc-induced long-period fiber gratings

G. Rego, R, Falate, Hypolito Kalinowski, J. Fabris, Paulo Marques, H. Salgado, J Santos

Proceedings Volume 5855, (2005) https://doi.org/10.1117/12.623387

KEYWORDS: Temperature metrology, Sensors, Head, Signal attenuation, Calibration, Fabrication, Sensor performance, Optical testing, Fiber optics sensors, Epoxies

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Proceedings Article | 23 May 2005 Paper

Paper

Intensity based luminescent optical fiber oxygen sensor using quantum dots

Pedro Jorge, M. Mayeh, R. Benrashid, P. Caldas, J. Santos, Faramarz Farahi

Proceedings Volume 5855, (2005) https://doi.org/10.1117/12.623643

KEYWORDS: Oxygen, Ruthenium, Light emitting diodes, Luminescence, Sensors, Nanocrystals, Quantum dots, Optical fibers, Sol-gels, Blue light emitting diodes

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Proceedings Article | 8 December 2004 Paper

Paper

Applications of nanoparticles in optical chemical and biological sensors

Faramarz Farahi, Pedro Jorge, Mona Mayeh, Ramazan Benrashid, Paulo Caldas, Jose Santos

Proceedings Volume 5590, (2004) https://doi.org/10.1117/12.580742

KEYWORDS: Luminescence, Light emitting diodes, Sensors, Oxygen, Ruthenium, Nanocrystals, Temperature metrology, Semiconductors, Nanoparticles, Quantum dots

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Proceedings Article | 9 June 2004 Paper

Paper

Optical temperature measurement configuration for fluorescence-based oxygen sensors

P. Jorge, P. Caldas, Carla Rosa, A. Oliva, M. Marques, Jose Santos

Proceedings Volume 5502, (2004) https://doi.org/10.1117/12.566591

KEYWORDS: Oxygen, Temperature metrology, Luminescence, Sensors, Ruthenium, Optical filters, Absorption filters, Signal detection, Optical testing, Environmental sensing

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Proceedings Article | 9 June 2004 Paper

Paper

Simultaneous measurement of temperature and strain using a step spectrum profile fibre Bragg grating arrangement

Orlando Frazao, R. Romero, Francisco Araujo, Luis Ferreira, Jose Santos

Proceedings Volume 5502, (2004) https://doi.org/10.1117/12.566546

KEYWORDS: Temperature metrology, Fiber Bragg gratings, Head, Sensors, Reflectivity, Computing systems, Data acquisition, Superposition, Radon, Lithium

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Proceedings Article | 9 June 2004 Paper

Paper

High-resolution absolute-distance measurements using multiple-tunable fiber Bragg gratings

E. Luquin, Orlando Frazao, Luis Ferreira, Francisco Araujo, Manuel Lopez-Amo, Jose Santos

Proceedings Volume 5502, (2004) https://doi.org/10.1117/12.566783

KEYWORDS: Fiber Bragg gratings, Interferometry, Distance measurement, Phase interferometry, Interferometers, Composites, Photodetectors, Metrology, Modulation, Optical fibers

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Proceedings Article | 9 June 2004 Paper

Paper

Simultaneous measurement of strain and temperature based on polarization loss properties of arc-induced long-period gratings

Orlando Frazao, Gasper Rego, Francisco Araujo, Luis Ferreira, Henrique Salgado, Jose Santos

Proceedings Volume 5502, (2004) https://doi.org/10.1117/12.566629

KEYWORDS: Temperature metrology, Polarization, Head, Fiber Bragg gratings, Fabrication, Sensors, Computing systems, Data acquisition, Thermal sensing, Modulation

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Proceedings Article | 9 June 2004 Paper

Paper

Evaluation of long-period fiber grating temperature sensors in nuclear environments

Alberto Fernandez Fernandez, Gasper Rego, Andrei Gusarov, Benoit Brichard, Jose Santos, Henrique Salgado, Francis Berghmans

Proceedings Volume 5502, (2004) https://doi.org/10.1117/12.566600

KEYWORDS: Gamma radiation, Temperature sensors, Radiation effects, Fiber optics sensors, Environmental sensing, Silicon, Information operations, Capillaries, Optical fibers, Sensors

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Proceedings Article | 9 June 2004 Paper

Paper

Measurement of the temperature of an optical fiber submitted to an electric arc discharge

Gasper Rego, Paulo Marques, Henrique Salgado, Jose Santos

Proceedings Volume 5502, (2004) https://doi.org/10.1117/12.566737

KEYWORDS: Temperature metrology, Spectroscopy, Black bodies, Refractive index, Optical fibers, Fiber Bragg gratings, Silica, Multimode fibers, Signal detection, Optical sensors

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SPIE Journal Paper | 1 March 2004

Wavelength multiplexing of frequency-based self-referenced fiber optic intensity sensors

Jose Baptista, Silvia Abad, Gaspar Rego, Luis Ferreira, Francisco Araújo, Jose Santos, Armindo Lage

OE, Vol. 43, Issue 03, (March 2004) https://doi.org/10.1117/12.10.1117/1.1646177

KEYWORDS: Sensors, Multiplexing, Fiber optics sensors, Fiber Bragg gratings, Wavelength division multiplexing, Signal attenuation, Fiber optics, Modulation, Attenuators, Sensor networks

SPIE Journal Paper | 1 February 2004

Fiber Bragg grating sensing system for simultaneous measurement of salinity and temperature

D. Pereira, Orlando Frazao, Jose Santos

OE, Vol. 43, Issue 02, (February 2004) https://doi.org/10.1117/12.10.1117/1.1637903

KEYWORDS: Fiber Bragg gratings, Refractive index, Water, Temperature metrology, Etching, Sensing systems, Reflectivity, Wet etching, Sensors, Head

SPIE Journal Paper | 1 August 2000

Simultaneous measurement of strain and temperature using interferometrically interrogated fiber Bragg grating sensors

Luis Ferreira, Francisco Araujo, Jose Santos, Faramarz Farahi

OE, Vol. 39, Issue 08, (August 2000) https://doi.org/10.1117/12.10.1117/1.1305493

KEYWORDS: Fiber Bragg gratings, Temperature metrology, Sensors, Hydrogen, Interferometry, Birefringence, Thermal optics, Polarization, Ultraviolet radiation, Phase shifts

SPIE Journal Paper | 1 June 2000

Mach-Zehnder and Michelson topologies for self-referencing fiber optic intensity sensors

Jose Baptista, Jose Santos, Armindo Lage

OE, Vol. 39, Issue 06, (June 2000) https://doi.org/10.1117/12.10.1117/1.602540

KEYWORDS: Sensors, Modulation, Structured optical fibers, Signal attenuation, Fiber optics sensors, Structural sensing, Geometrical optics, Interferometers, Head, Constructive interference

SPIE Journal Paper | 1 May 2000

Analysis of the flyback effects on the serrodyne interferometric demodulation of fiber optic Bragg grating sensors

P. Jorge, Luis Ferreira, Jose Santos

OE, Vol. 39, Issue 05, (May 2000) https://doi.org/10.1117/12.10.1117/1.602510

KEYWORDS: Interferometers, Modulation, Phase interferometry, Phase shift keying, Interferometry, Fiber Bragg gratings, Fiber optics sensors, Sensors, Demodulation, Ferroelectric materials

Proceedings Article | 3 February 1999 Paper

Paper

Active WDM demodulation scheme for fiber Bragg grating sensors

Francisco Araujo, Luis Ferreira, Jose Santos, Faramarz Farahi

Proceedings Volume 3541, (1999) https://doi.org/10.1117/12.339109

KEYWORDS: Wavelength division multiplexing, Fiber Bragg gratings, Sensors, Ferroelectric materials, Demodulation, Signal detection, Wavelength tuning, Amplifiers, Signal to noise ratio, Feedback loops

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Proceedings Article | 13 August 1998 Paper

Paper

Comparison study of the Mach-Zehnder and Michelson topologies for resonant fiber optic intensity sensors

Jose Baptista, Jose Santos, Armindo Lage

Proceedings Volume 3555, (1998) https://doi.org/10.1117/12.318198

KEYWORDS: Sensors, Fiber optics sensors, Resonators, Modulation, Signal attenuation, Fiber optics, Structured optical fibers, Mirrors, Geometrical optics, Signal processing

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Proceedings Article | 18 June 1998 Paper

Paper

Simultaneous strain and temperature sensing using an interferometrically interrogated fibre Bragg grating written in bowtie fibre

Luis Ferreira, Francisco Araujo, Jose Santos, Faramarz Farahi

Proceedings Volume 3483, (1998) https://doi.org/10.1117/12.309638

KEYWORDS: Fiber Bragg gratings, Temperature metrology, Interferometry, Sensors, Polarization, Interferometers, Signal detection, Fabry–Perot interferometers, Demodulation, Phase measurement

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Proceedings Article | 18 June 1998 Paper

Paper

Extended-range interrogation scheme for fibre Bragg grating sensors using a multimode laser diode

P. Moreira, Luis Ferreira, Jose Santos, Faramarz Farahi

Proceedings Volume 3483, (1998) https://doi.org/10.1117/12.309691

KEYWORDS: Sensors, Semiconductor lasers, Fiber Bragg gratings, Demodulation, Polarization, Optical filters, Tunable filters, Modes of laser operation, Signal processing, Servomechanisms

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Proceedings Article | 14 September 1994 Paper

Paper

Polarization-induced noise in a fibre optic Michelson interferometer: influence of the coupler

Luis Ferreira, Jose Santos, Faramarz Farahi

Proceedings Volume 2360, (1994) https://doi.org/10.1117/12.185072

KEYWORDS: Polarization, Michelson interferometers, Birefringence, Interferometry, Sensors, Interferometers, Fiber optics, Lead, Signal detection, Mirrors

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Proceedings Article | 1 January 1992 Paper

Paper

Time-division multiplexing exploiting low-coherence interferometry with a multimode laser diode source

Jose Santos, David Jackson

Proceedings Volume 1586, (1992) https://doi.org/10.1117/12.56518

KEYWORDS: Sensors, Fiber optics sensors, Multiplexing, Interferometers, Semiconductor lasers, Electronics, Optical isolators, Coherence (optics), Modulation, Fiber optics

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Proceedings Article | 1 August 1991 Paper

Paper

Multiplexing of remote all-fiber Michelson interferometers with lead insensitivity

Jose Santos, Faramarz Farahi, Trevor Newson, Antonio Leite, David Jackson

Proceedings Volume 1511, (1991) https://doi.org/10.1117/12.45991

KEYWORDS: Interferometers, Sensors, Signal detection, Lead, Interference (communication), Fiber optics sensors, Ferroelectric materials, Michelson interferometers, Multiplexing, Fiber amplifiers

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Proceedings Article | 1 August 1991 Paper

Paper

Time-addressing of coherence-tuned optical fibre sensors based on a multimode laser diode

Jose Santos, David Jackson

Proceedings Volume 1572, (1991) https://doi.org/10.1117/12.50026

KEYWORDS: Sensors, Semiconductor lasers, Modulation, Visibility, Optical isolators, Interferometers, Multiplexing, Optical fibers, Temperature metrology, Coherence (optics)

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Proceedings Article | 1 August 1990 Paper

Paper

Electronic speckle-pattern interferometry compensated for environmentally induced phase noise

Trevor Newson, Jose Santos, David Jackson

Proceedings Volume 1267, (1990) https://doi.org/10.1117/12.20303

KEYWORDS: Speckle pattern, Interferometry, Speckle, Visibility, Servomechanisms, Optical fibers, Cameras, Modulators, Michelson interferometers, Fiber optics sensors

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Proceedings Article | 1 August 1990 Paper

Paper

Time-division multiplexing with sampled modulation of laser diode

Jose Santos, Faramarz Farahi, Trevor Newson, David Jackson

Proceedings Volume 1267, (1990) https://doi.org/10.1117/12.20307

KEYWORDS: Interferometers, Sensors, Signal detection, Modulation, Semiconductor lasers, Multiplexing, Time division multiplexing, Fiber optics sensors, Mach-Zehnder interferometers, Optical fibers

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Showing 5 of 134 publications

Proceedings Volume Editor (2)

SPIE Conference Volume | 22 May 2014

23rd International Conference on Optical Fibre Sensors

SPIE Conference Volume | 8 September 2010

Fourth European Workshop on Optical Fibre Sensors

Conference Committee Involvement (8)

29th International Conference on Optical Fiber Sensors

25 May 2025 | Porto, Portugal

OFS2014 23rd International Conference on Optical Fiber Sensors

2 June 2014 | Santander, Spain

OFS2014 23rd International Conference on Optical Fiber Sensors

2 June 2014 | Santander, Spain

OFS2012 22nd International Conference on Optical Fiber Sensor: Post-Deadline Papers

14 October 2012 | Beijing, China

Advanced Sensor Systems and Applications IV

18 October 2010 | Beijing, China

Showing 5 of 8 Conference Committees

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