Dr. Francisco Javier Madruga Saavedra Profile

Dr. Francisco Javier Madruga Saavedra

Professor TEISA Dept at Univ de Cantabria

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Author

Publications (34)

Proceedings Article | 28 July 2017 Paper

Automated skin lesion segmentation with kernel density estimation

A. Pardo, E. Real, G. Fernandez-Barreras, F. Madruga, J. López-Higuera, O. Conde

Proceedings Volume 10411, 104110P (2017) https://doi.org/10.1117/12.2283038

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Proceedings Article | 24 August 2015 Paper

Interference of speckle patterns projected by multimode fibers

M. Lomer, L. Rodriguez-Cobo, F. Madruga, J. M. Lopez-Higuera

Proceedings Volume 9660, 96601S (2015) https://doi.org/10.1117/12.2196283

KEYWORDS: Speckle pattern, Multimode fibers, Speckle, Optical fibers, Polarization, Polymethylmethacrylate, Michelson interferometers, Interferometers, Refractive index, Silica

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Proceedings Article | 2 June 2014 Paper

Speckle POF sensor for detecting vital signs of patients

M. Lomer, L. Rodriguez-Cobo, P. Revilla, G. Herrero, F. Madruga, J. Lopez-Higuera

Proceedings Volume 9157, 91572I (2014) https://doi.org/10.1117/12.2059747

KEYWORDS: Speckle pattern, Sensors, Heart, Speckle, Phase only filters, Vital signs, Transducers, Beam propagation method, Chest, Optical fibers

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Proceedings Article | 9 November 2010 Paper

Fiber optics in structural health monitoring

J. M. López-Higuera, L. Rodriguez, A. Quintela, A. Cobo, F. Madruga, Olga Conde, M. Lomer, M. A. Quintela, J. Mirapeix

Proceedings Volume 7853, 78530D (2010) https://doi.org/10.1117/12.876192

KEYWORDS: Structural health monitoring, Sensors, Transducers, Fiber optics sensors, Fiber Bragg gratings, Fiber optics, Optical fibers, Structured optical fibers, Sensing systems, Composites

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Proceedings Article | 14 October 2010 Paper

High resolution method for measuring Brillouin spectrum scattering in special optical fibers

Carlos Galindez, Francisco Madruga, Jose Lopez-Higuera

Proceedings Volume 7839, 783916 (2010) https://doi.org/10.1117/12.867077

KEYWORDS: Scattering, Optical fibers, Signal processing, Polarization, Resonators, Photonic crystal fibers, Structured optical fibers, Fiber lasers, Light scattering, Signal attenuation

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Proceedings Article | 5 October 2009 Paper

Multi-zone temperature sensor using a multi-wavelength Brillouin fiber ring laser

Carlos Galindez, Francisco Madruga, Angel Ullan, Manuel Lopez-Amo, Jose Lopez-Higuera

Proceedings Volume 7503, 75030J (2009) https://doi.org/10.1117/12.835138

KEYWORDS: Fiber lasers, Temperature metrology, Sensing systems, Sensors, Optical fibers, Heterodyning, Temperature sensors, Laser scattering, Scattering, Optical amplifiers

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Proceedings Article | 22 April 2009 Paper

Enhanced contrast detection of subsurface defects by pulsed infrared thermography based on the fourth order statistic moment, kurtosis

Francisco Madruga, Clemente Ibarra-Castanedo, Olga Conde, Xavier Maldague, José López-Higuera

Proceedings Volume 7299, 72990U (2009) https://doi.org/10.1117/12.818684

KEYWORDS: Thermography, Defect detection, Statistical analysis, Image processing, Inspection, Infrared cameras, Data processing, Image compression, Nondestructive evaluation, Image enhancement

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Proceedings Article | 16 May 2008 Paper

Effect of humidity on optical fiber distributed sensor based on Brillouin scattering

Carlos Galindez, Francisco Madruga, M. Lomer, A. Cobo, Jose Lopez-Higuera

Proceedings Volume 7004, 70044W (2008) https://doi.org/10.1117/12.786159

KEYWORDS: Humidity, Optical fibers, Scattering, Sensors, Single mode fibers, Temperature metrology, Light scattering, Optical amplifiers, Climatology, Wavelength division multiplexing

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Proceedings Article | 11 April 2008 Paper

Infrared imaging spectroscopic system based on a PGP spectrograph and a monochrome infrared camera

Pilar Beatriz Garcia-Allende, Francisco Anabitarte, Olga Conde, Francisco Madruga, Mauro Lomer, Jose Lopez-Higuera

Proceedings Volume 6941, 694118 (2008) https://doi.org/10.1117/12.770290

KEYWORDS: Imaging systems, Calibration, Imaging spectroscopy, Spectrographs, Cameras, Spectroscopy, Hyperspectral imaging, Reflectivity, Near infrared, Light sources

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Proceedings Article | 11 April 2008 Paper

Support vector machines in hyperspectral imaging spectroscopy with application to material identification

P. Beatriz Garcia-Allende, Francisco Anabitarte, Olga Conde, Jesus Mirapeix, Francisco Madruga, Jose Lopez-Higuera

Proceedings Volume 6966, 69661V (2008) https://doi.org/10.1117/12.770306

KEYWORDS: Hyperspectral imaging, Near infrared, Principal component analysis, Imaging spectroscopy, Image classification, Spectrographs, Imaging systems, Sensors, Calibration, Spectroscopy

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Proceedings Article | 17 March 2008 Paper

Industrial defect discrimination applying infrared imaging spectroscopy and artificial neural networks

Pilar Beatriz Garcia-Allende, Olga Conde, Francisco Madruga, Ana Cubillas, Jose Lopez-Higuera

Proceedings Volume 6939, 69390H (2008) https://doi.org/10.1117/12.770279

KEYWORDS: Hyperspectral imaging, Near infrared, Raw materials, Principal component analysis, Imaging spectroscopy, Cameras, Spectrographs, Artificial neural networks, Data compression, Calibration

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Proceedings Article | 2 July 2007 Paper

Effects of temperature on high concentration erbium-doped fiber intrinsic parameters

Francisco Madruga, M. Ángeles Quintela, Carlos Galíndez, Mauro Lomer, José López-Higuera

Proceedings Volume 6619, 66190W (2007) https://doi.org/10.1117/12.738365

KEYWORDS: Erbium, Absorption, Temperature metrology, Optical amplifiers, Lanthanum, Fiber amplifiers, Climatology, Fiber characterization, Tunable lasers, Telecommunications

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Proceedings Article | 2 July 2007 Paper

Comparison between a symmetric bidirectional-pumping and a unidrectional-pumping configurations in an erbium fiber ring laser

M. A. Quintela, C. Quintela, M. Lomer, F. Madruga, O. Conde, J. Lopez-Higuera

Proceedings Volume 6619, 66192O (2007) https://doi.org/10.1117/12.738538

KEYWORDS: Fiber lasers, Erbium, L band, Erbium lasers, Optical isolators, Wavelength division multiplexing, Tunable filters, Wavelength tuning, Signal to noise ratio, Absorption

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Proceedings Article | 2 July 2007 Paper

Pulse shapes effects on backscattering Brillouin gain for distributed fiber sensing

C. Galíndez, J. Lázaro, P. B. García-Allende, F. Madruga, J. López-Higuera

Proceedings Volume 6619, 66193A (2007) https://doi.org/10.1117/12.738669

KEYWORDS: Light scattering, Spatial resolution, Backscatter, Scattering, Optical fibers, Sensors, Teeth, Phonons, Modulation

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Proceedings Article | 7 May 2007 Paper

Pulse shape effects on the measurement of temperature using a Brillouin-based optical fiber sensor

Carlos Galindez, Francisco-Javier Madruga, Adolfo Cobo, Olga Conde, Jose-Miguel Lopez-Higuera

Proceedings Volume 6572, 65720S (2007) https://doi.org/10.1117/12.719432

KEYWORDS: Modulation, Optical fibers, Spatial resolution, Temperature metrology, Scattering, Teeth, Phonons, Light scattering, Shape analysis

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Proceedings Article | 9 April 2007 Paper

Arc-welding process control based on back face thermography: application to the manufacturing of nuclear steam generators

A. Cobo, J. Mirapeix, O. Conde, P. García-Allende, F. Madruga, J. López-Higuera

Proceedings Volume 6541, 65410F (2007) https://doi.org/10.1117/12.718949

KEYWORDS: Cameras, Temperature metrology, Thermography, Infrared radiation, Visible radiation, CCD cameras, Infrared imaging, Image analysis, Morphological analysis, Image processing

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Proceedings Article | 9 April 2007 Paper

Field test of infrared thermography applied to biogas controlling in landfill sites

Francisco Madruga, Jaime Muñoz, Daniel González, Juan Tejero, Adolfo Cobo, José Gil, Olga Conde, Jose López-Higuera

Proceedings Volume 6541, 65411B (2007) https://doi.org/10.1117/12.719366

KEYWORDS: Biogases, Thermography, Infrared radiation, Infrared imaging, Atrial fibrillation, Silver, Solids, Methane, Absorption, Temperature metrology

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Proceedings Article | 18 April 2006 Paper

Quality control on radiant heaters manufacture

Daniel González, Francisco Madruga, Clemente Ibarra-Castanedo, Olga Conde, Jose López-Higuera

Proceedings Volume 6205, 62051O (2006) https://doi.org/10.1117/12.665490

KEYWORDS: Infrared cameras, Radon transform, Inspection, Image processing, Manufacturing, Platinum, Control systems, Thermography, Algorithm development, Defect detection

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Proceedings Article | 18 April 2006 Paper

Analysis of pulsed thermographic sequences based on radon transform

Daniel González, Clemente Ibarra-Castanedo, Francisco Madruga, Xavier Maldague

Proceedings Volume 6205, 62051N (2006) https://doi.org/10.1117/12.665461

KEYWORDS: Radon transform, Algorithm development, Thermography, Inspection, Machine vision, Computer vision technology, Defect detection, Thermal modeling, Diffusion, Radon

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Proceedings Article | 12 October 2005 Paper

Quality control of radiant heaters

Daniel González, Francisco Madruga, María Quintela, José López-Higuera

Proceedings Volume 5948, 594823 (2005) https://doi.org/10.1117/12.621847

KEYWORDS: Infrared cameras, Inspection, Thermography, Manufacturing, Nondestructive evaluation, Defect detection, Process control, Image classification, Machine vision, Computer vision technology

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Proceedings Article | 24 September 2005 Paper

Visibility degradation in interferometric fiber-optic sensors incorporating EDFA's

M. A. Quintela, C. Jauregui, A. M. Cubillas, F. Madruga, J. López-Higuera

Proceedings Volume 5952, 59520B (2005) https://doi.org/10.1117/12.623172

KEYWORDS: Picosecond phenomena, Optical amplifiers, Visibility, Polarization, Interferometry, Interferometers, Poincaré sphere, Fiber optics sensors, Sensors, Birefringence

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Proceedings Article | 9 June 2004 Paper

Pump tuning of an erbium-doped-fiber LPG

Mariangeles Quintela, Daniel Gonzalez, Francisco Madruga, Mauro Lomer, Jose Lopez-Higuera

Proceedings Volume 5502, (2004) https://doi.org/10.1117/12.566694

KEYWORDS: Refractive index, Signal attenuation, Erbium, Optical fibers, Cladding, Absorption, Fiber optic components, Tunable filters, Calcium, Fiber optics sensors

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Proceedings Article | 9 June 2004 Paper

Torsion-induced effects on UV long-period fiber gratings

Daniel Gonzalez, Cesar Jauregui, Antonio Quintela, Francisco Madruga, P. Marquez, Jose Lopez-Higuera

Proceedings Volume 5502, (2004) https://doi.org/10.1117/12.566619

KEYWORDS: Cladding, Birefringence, Polarization, Sensors, Ultraviolet radiation, Fabrication, Signal attenuation, Telecommunications, Fiber optics sensors, Optical fibers

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Proceedings Article | 8 March 2004 Paper

Strain and temperature remote sensing of concrete structures using photonic sensors

Antonio Quintela, Cesar Jauregui, Francisco Madruga, Mariangeles Quintela, Jose Miguel Lopez-Higuera

Proceedings Volume 5272, (2004) https://doi.org/10.1117/12.517211

KEYWORDS: Remote sensing, Photodetectors, Sensors, Sensing systems, Transducers, Fiber Bragg gratings, Temperature metrology, Internet

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Proceedings Article | 18 February 2004 Paper

Analysis and design tool for optical multipass systems modeled with parametric surfaces

Olga Conde, Adolfo Cobo, Francisco Madruga, M. Quintela, Jose Lopez-Higuera

Proceedings Volume 5249, (2004) https://doi.org/10.1117/12.513291

KEYWORDS: Mirrors, Reflection, Optical design, Systems modeling, Spherical lenses, Solid modeling, Optics manufacturing, Manufacturing, Light sources, Gases

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Proceedings Article | 13 March 2003 Paper

Embedded fiber Bragg grating transducer for concrete structures

Antonio Quintela, Cesar Jauregui, Juan Echevarria, Olga Conde, Francisco Madruga, Jose Miguel Lopez-Higuera

Proceedings Volume 4763, (2003) https://doi.org/10.1117/12.508740

KEYWORDS: Transducers, Fiber Bragg gratings, Temperature metrology, Civil engineering, Photonics, Multiplexing, Medicine, Electromagnetism, Dielectrics, Signal attenuation

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Proceedings Article | 27 June 2002 Paper

Optical fiber transducer for monitoring the cooling profile of iron-steel bars

Francisco Madruga, Victor Alvarez, Daniel Gonzalez, Juan Echevarria, Jose Miguel Lopez-Higuera

Proceedings Volume 4694, (2002) https://doi.org/10.1117/12.472630

KEYWORDS: Transducers, Temperature metrology, Optical fibers, Calibration, Ceramics, Fiber optics, Fiber optics sensors, Sensors, Black bodies, Photonics

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Proceedings Article | 27 June 2002 Paper

Fiber Bragg grating first- and second-order diffraction-wavelength-based transducer-optimized design

Juan Echevarria, Francisco Madruga, Mauro Lomer, Jose Miguel Lopez-Higuera

Proceedings Volume 4694, (2002) https://doi.org/10.1117/12.472615

KEYWORDS: Transducers, Fiber Bragg gratings, Optical fibers, Temperature metrology, Diffraction, Condition numbers, Optical design, Head, Error analysis, Fiber optics

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Proceedings Article | 14 February 2002 Paper

New optical cell design for pollutant detection

Olga Conde, Sergio Garcia, Jesus Mirapeix, Juan Echevarria, Francisco Madruga Saavedra, Jose Miguel Lopez-Higuera

Proceedings Volume 4578, (2002) https://doi.org/10.1117/12.456083

KEYWORDS: Mirrors, Transducers, Optics manufacturing, Reflectivity, Chemical elements, Optical components, Reflection, Fiber optics sensors, Absorption, Modulation

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Proceedings Article | 6 August 2001 Paper

High-temperature optical fiber transducer for a smart structure on iron-steel production industry

Jose Miguel Lopez-Higuera, Francisco Madruga Saavedra, Daniel Gonzalez Fernandez, Victor Alvarez Ortego, Javier Hierro

Proceedings Volume 4328, (2001) https://doi.org/10.1117/12.435541

KEYWORDS: Transducers, Temperature metrology, Black bodies, Spherical lenses, Optical fibers, Sensors, Smart structures, Infrared radiation, Convection, Photodetectors

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Proceedings Article | 6 August 2001 Paper

Temperature, displacement, and acceleration fiber optic sensor for large machinery monitoring

Jose Miguel Lopez-Higuera, Adolfo Cobo, Juan Echevarria, Olga Conde, Francisco Madruga Saavedra

Proceedings Volume 4328, (2001) https://doi.org/10.1117/12.435540

KEYWORDS: Fiber Bragg gratings, Transducers, Sensors, Temperature metrology, Fiber optics sensors, Multimode fibers, Channel projecting optics, Optical fibers, Photodiodes, Fiber couplers

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Proceedings Article | 29 December 1999 Paper

Phenomenological approach to the analysis of the polarization effects in fiber optic interferometers

Jorge Arce-Diego, Miguel Morante Rabago, Francisco Madruga Saavedra, Jose Miguel Lopez-Higuera

Proceedings Volume 4016, (1999) https://doi.org/10.1117/12.373628

KEYWORDS: Polarization, Interferometers, Scattering, Birefringence, Optical fibers, Mach-Zehnder interferometers, Michelson interferometers, Fiber optics, Visibility, Sagnac interferometers

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Proceedings Article | 18 June 1998 Paper

Analog optical U-shaped fibre transducer based on index modulation for quasi-distributed sensing

Jorge Arce-Diego, Juan Echevarria, Miguel Morante Rabago, Adolfo Cobo, Francisco Madruga Saavedra, Mauro Lomer, Jose Miguel Lopez-Higuera

Proceedings Volume 3483, (1998) https://doi.org/10.1117/12.309636

KEYWORDS: Transducers, Optical fibers, Retroreflectors, Analog electronics, Sensors, Refractive index, Modulation, Cladding, Silicon, Reflectivity

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Proceedings Article | 18 June 1998 Paper

Optical fiber and integrated optics accelerometers for real-time vibration monitoring in harsh environments: in-lab and in-field characterization

Jose Miguel Lopez-Higuera, Patrick Mottier, Adolfo Cobo, Eric Ollier, Miguel Morante Rabago, C. Chabrol, Francisco Madruga Saavedra, P. Philippe

Proceedings Volume 3483, (1998) https://doi.org/10.1117/12.309678

KEYWORDS: Integrated optics, Optical fibers, Sensors, Transducers, Head, Environmental monitoring, Signal detection, Reliability, Environmental sensing, Optical sensors

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Showing 5 of 34 publications

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