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Proceedings Paper

Distributed detection of temperature gradients with single-wavelength phase-sensitive OTDR and speckle analysis methods
Author(s): Andres Garcia-Ruiz; Juan Pastor-Graells; Hugo F. Martins; Sonia Martin-Lopez; Miguel Gonzalez-Herraez
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Paper Abstract

A method to evaluate distributed temperature gradients along an optical fiber using phase-sensitive optical time domain reflectometry (ΦOTDR) with direct detection is proposed and experimentally validated. The measurement principle derives from the perturbation response of a single-wavelength ΦOTDR signal, which is analyzed as a unidimensional speckle pattern. Our method can be implemented in real-time, relies solely on a low-cost post-processing of the standard ΦOTDR traces and requires no scanning of the laser frequency. This post-processing method can be implemented over a conventional ΦOTDR system used for distributed intrusion detection, without affecting its operation or requiring any additional hardware.

Paper Details

Date Published: 30 May 2016
PDF: 4 pages
Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 99162R (30 May 2016); doi: 10.1117/12.2236206
Show Author Affiliations
Andres Garcia-Ruiz, Univ. de Alcalá (Spain)
Juan Pastor-Graells, Univ. de Alcalá (Spain)
Hugo F. Martins, FOCUS S. L. (Spain)
Sonia Martin-Lopez, Univ. de Alcalá (Spain)
Miguel Gonzalez-Herraez, Univ. de Alcalá (Spain)


Published in SPIE Proceedings Vol. 9916:
Sixth European Workshop on Optical Fibre Sensors
Elfed Lewis, Editor(s)

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