Modulation instability-induced visibility fading in phase-sensitive OTDR

Hugo F. Martins; Sonia Martin-Lopez; Pedro Corredera; Pedro Salgado; Orlando Frazão; Miguel González-Herráez

doi:10.1117/12.2026062

20 May 2013 Modulation instability-induced visibility fading in phase-sensitive OTDR

Hugo F. Martins, Sonia Martin-Lopez, Pedro Corredera, Pedro Salgado, Orlando Frazão, Miguel González-Herráez

Proceedings Volume 8794, Fifth European Workshop on Optical Fibre Sensors; 87943E (2013) https://doi.org/10.1117/12.2026062
Event: Fifth European Workshop on Optical Fibre Sensors, 2013, Krakow, Poland

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.

Citation Download Citation

Hugo F. Martins, Sonia Martin-Lopez, Pedro Corredera, Pedro Salgado, Orlando Frazão, and Miguel González-Herráez "Modulation instability-induced visibility fading in phase-sensitive OTDR", Proc. SPIE 8794, Fifth European Workshop on Optical Fibre Sensors, 87943E (20 May 2013); https://doi.org/10.1117/12.2026062

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