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Proceedings Paper

Modulation instability-induced visibility fading in phase-sensitive OTDR
Author(s): Hugo F. Martins; Sonia Martin-Lopez; Pedro Corredera; Pedro Salgado; Orlando Frazão; Miguel González-Herráez
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Paper Abstract

Phase-sensitive optical time domain reflectometry (ΦOTDR) is a simple and effective tool that allows the distributed monitoring of vibrations along single-mode fibers. In this letter we study the effects of modulation instability (MI) in long-range ΦOTDR over conventional optical fibers. We demonstrate both theoretically and experimentally that MI can induce a position-dependent signal fading which leads to a nearly complete visibility loss in the interference signal recorded at certain positions and therefore to a sensitivity loss at these positions. While this effect is detrimental in the context of distributed vibration analysis using ΦOTDR, we also believe that the technique provides a clear and insightful way to evidence the Fermi-Pasta-Ulam (FPU) recurrence associated to the MI process.

Paper Details

Date Published: 20 May 2013
PDF: 4 pages
Proc. SPIE 8794, Fifth European Workshop on Optical Fibre Sensors, 87943E (20 May 2013); doi: 10.1117/12.2026062
Show Author Affiliations
Hugo F. Martins, INESC Porto (Portugal)
Univ. do Porto (Portugal)
Sonia Martin-Lopez, Univ. de Alcalá (Spain)
Pedro Corredera, Consejo Superior de Investigaciones Científicas (Spain)
Pedro Salgado, Consejo Superior de Investigaciones Científicas (Spain)
Orlando Frazão, INESC Porto (Portugal)
Miguel González-Herráez, Univ. de Alcalá (Spain)

Published in SPIE Proceedings Vol. 8794:
Fifth European Workshop on Optical Fibre Sensors
Leszek R. Jaroszewicz, Editor(s)

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