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Speckle Analysis Method for Distributed Detection of Temperature Gradients with ΦOTDR
A method to extend the operation of traditional single-frequency phase-sensitive optical time-domain reflectometry (ΦOTDR) to the monitoring of distributed temperature gradients along an optical fiber is proposed and experimentally validated. The measurement principle is derived from the perturbation response of a single-wavelength ΦOTDR signal, which is analyzed as a unidimensional speckle pattern. The method could be implemented in parallel to standard ΦOTDR systems used for distributed vibration sensing with a close to zero cost and without affecting its operation, as it only requires a low computational cost post-processing of the traces which are already acquired. Frequency scanning of the laser, heterodyning or additional hardware are not required. The distributed detection of a temperature gradient of 2.5 °C over 10 min is demonstrated. ; European Commission ; Ministerio de Economía y Competitividad ; Comunidad de Madrid
Speckle Analysis Method for Distributed Detection of Temperature Gradients with ΦOTDR
A method to extend the operation of traditional single-frequency phase-sensitive optical time-domain reflectometry (ΦOTDR) to the monitoring of distributed temperature gradients along an optical fiber is proposed and experimentally validated. The measurement principle is derived from the perturbation response of a single-wavelength ΦOTDR signal, which is analyzed as a unidimensional speckle pattern. The method could be implemented in parallel to standard ΦOTDR systems used for distributed vibration sensing with a close to zero cost and without affecting its operation, as it only requires a low computational cost post-processing of the traces which are already acquired. Frequency scanning of the laser, heterodyning or additional hardware are not required. The distributed detection of a temperature gradient of 2.5 °C over 10 min is demonstrated. ; European Commission ; Ministerio de Economía y Competitividad ; Comunidad de Madrid
Speckle Analysis Method for Distributed Detection of Temperature Gradients with ΦOTDR
García Ruiz, Andrés (Autor:in) / Pastor Graells, Juan (Autor:in) / Fidalgo Martins, Hugo (Autor:in) / Martín López, Sonia (Autor:in) / González Herráez, Miguel (Autor:in) / Ingeniería Fotónica / Universidad de Alcalá. Departamento de Electrónica
15.09.2016
doi:10.1109/LPT.2016.2578043
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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