Mr. Juan Pastor-Graells Profile

Juan Pastor-Graells

Professor at Univ de Alcalá

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Author

Publications (9)

Proceedings Article | 23 April 2017 Paper

Chirped-pulse phase-sensitive reflectometry: hearing behind the walls with high fidelity

M. Gonzalez-Herraez, J. Pastor-Graells, A. García-Ruiz, M. R. Fernández-Ruiz, H. Martins, S. Martin-Lopez

Proceedings Volume 10323, 1032302 (2017) https://doi.org/10.1117/12.2272461

KEYWORDS: Optical fibers, Reflectometry, Temperature metrology, Sensors, Absorption, Modulation, Signal to noise ratio, Refractive index, Fiber optics sensors, Ferroelectric materials

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Proceedings Article | 23 April 2017 Paper

Distributed photothermal measurements of gas presence along holey optical fibers

Andres Garcia-Ruiz, Juan Pastor-Graells, Hugo Martins, Kenny Hey Tow, Luc Thévenaz, Sonia Martin-Lopez, Miguel Gonzalez-Herraez

Proceedings Volume 10323, 1032361 (2017) https://doi.org/10.1117/12.2263210

KEYWORDS: Chemical fiber sensors, Absorption, Temperature metrology, Photothermal effect, Optical fibers, Modulation, Spatial resolution, Spectroscopy, Chemical analysis, Reflectometry

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Proceedings Article | 23 April 2017 Paper

Impact of the laser phase noise on chirped-pulse phase-sensitive OTDR

Juan Pastor-Graells, María Fernández-Ruiz, Hugo Martins, Andres Garcia-Ruiz, Sonia Martin-Lopez, Miguel Gonzalez-Herraez

Proceedings Volume 10323, 103238T (2017) https://doi.org/10.1117/12.2266870

KEYWORDS: Sensors, Fiber optics sensors, Acoustics, Interference (communication), Signal to noise ratio, Pulsed laser operation, Refractive index, Signal detection, Temperature metrology, Optical amplifiers

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Proceedings Article | 23 April 2017 Paper

20 dB SNR enhancement in phase-sensitive OTDR using pulse stretching and recompression

Juan Pastor-Graells, Luis Romero Cortés, Hugo Martins, María Fernández-Ruiz, José Azaña, Sonia Martin-Lopez, Miguel Gonzalez-Herraez

Proceedings Volume 10323, 103230R (2017) https://doi.org/10.1117/12.2265605

KEYWORDS: Signal to noise ratio, Sensors, Reflectometry, Spatial resolution, Connectors, Picosecond phenomena, Pulsed laser operation, Modulation, Optical amplifiers, Optical filters

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Proceedings Article | 23 April 2017 Paper

Impact of the probe pulse shape on the performance of phase-sensitive optical time-domain reflectometry sensors

María R. Fernández-Ruiz, Hugo Martins, Juan Pastor-Graells, Sonia Martin-Lopez, Miguel Gonzalez-Herraez

Proceedings Volume 10323, 103236P (2017) https://doi.org/10.1117/12.2263848

KEYWORDS: Sensors, Reflectometry, Modulation, Spatial resolution, Signal to noise ratio, Visibility, Shape analysis, Rectangular pulse, Computer simulations, Optical amplifiers

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Proceedings Article | 23 April 2017 Paper

Towards detection of pipeline integrity threats using a smart fiber optic surveillance system: PIT-STOP project blind field test results

J. Tejedor, J. Macias-Guarasa, H. Martins, D. Piote, J. Pastor-Graells, S. Martin-Lopez, P. Corredera, G. De Pauw, F. De Smet, W. Postvoll, C. H. Ahlen, M. Gonzalez-Herraez

Proceedings Volume 10323, 103231K (2017) https://doi.org/10.1117/12.2263357

KEYWORDS: Sensors, Surveillance systems, Fiber optics tests, Fiber optics, Acoustics, System integration, Classification systems, Sensing systems, Fiber optics sensors, Feature extraction

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Proceedings Article | 30 May 2016 Paper

Distributed detection of temperature gradients with single-wavelength phase-sensitive OTDR and speckle analysis methods

Andres Garcia-Ruiz, Juan Pastor-Graells, Hugo Martins, Sonia Martin-Lopez, Miguel Gonzalez-Herraez

Proceedings Volume 9916, 99162R (2016) https://doi.org/10.1117/12.2236206

KEYWORDS: Speckle analysis, Speckle, Signal processing, Optical fibers, Reflectometry, Speckle pattern, Fiber optics sensors, Temperature metrology, Signal detection, Optical amplifiers, Scattering, Refractive index, Optical filters

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Proceedings Article | 30 May 2016 Paper

Dynamic distributed measurement of temperature changes using phase-sensitive OTDR with chirped pulses

Juan Pastor-Graells, Hugo Martins, Andres Garcia-Ruiz, Sonia Martin-Lopez, Miguel Gonzalez-Herraez

Proceedings Volume 9916, 99162Q (2016) https://doi.org/10.1117/12.2236192

KEYWORDS: Fiber optics sensors, Temperature metrology, Rayleigh scattering, Scattering, Mechanical sensors, Sensors, Spatial resolution, Time metrology, Refractive index, Raman spectroscopy, Optical fibers, Beam controllers

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Proceedings Article | 28 September 2015 Paper

Early detection of pipeline integrity threats using a smart fiber optic surveillance system: the PIT-STOP project

H. Martins, D. Piote, J. Tejedor, J. Macias-Guarasa, J. Pastor-Graells, S. Martin-Lopez, P. Corredera, F. De Smet, W. Postvoll, C. H. Ahlen, M. Gonzalez-Herraez

Proceedings Volume 9634, 96347X (2015) https://doi.org/10.1117/12.2192075

KEYWORDS: Acoustics, Surveillance systems, Sensors, Fiber optics, Optical fibers, Neodymium, Optical pattern recognition, Interference (communication), Pattern recognition, Ions

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Showing 5 of 9 publications

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