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20 dB SNR enhancement in phase-sensitive OTDR using pulse stretching and recompression
Author(s): Juan Pastor-Graells; Luis Romero Cortés; Hugo F. Martins; María R. Fernández-Ruiz; José Azaña; Sonia Martin-Lopez; Miguel Gonzalez-Herraez
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Paper Abstract

This work shows the possibility of using chirped pulse amplification concepts in order to increase the signal-to-noise ratio (SNR) of phase sensitive optical time domain reflectometry (ΦOTDR) sensors. This method allows to increase the SNR of a ΦOTDR sensor without sacrificing spatial resolution. Here, we report a ΦOTDR sensor with a spatial resolution of 3 mm (limited only by the available detection equipment) and an SNR increase of 20 dB over the traditional architecture. To our knowledge, this is the highest-resolution ΦOTDR sensor reported to date.

Paper Details

Date Published: 23 April 2017
PDF: 4 pages
Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103230R (23 April 2017); doi: 10.1117/12.2265605
Show Author Affiliations
Juan Pastor-Graells, Univ. de Alcalá (Spain)
Luis Romero Cortés, INRS-EMT (Canada)
Hugo F. Martins, FOCUS S.L. (Spain)
María R. Fernández-Ruiz, Univ. de Alcalá (Spain)
José Azaña, INRS-EMT (Canada)
Sonia Martin-Lopez, Univ. de Alcalá (Spain)
Miguel Gonzalez-Herraez, Univ. de Alcalá (Spain)


Published in SPIE Proceedings Vol. 10323:
25th International Conference on Optical Fiber Sensors
Youngjoo Chung; Wei Jin; Byoungho Lee; John Canning; Kentaro Nakamura; Libo Yuan, Editor(s)

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