Distributed strain and temperature sensing over 50 km of SMF with 1 m spatial resolution employing BOTDA and optical pulse coding

Marcelo A. Soto; Gabriele Bolognini; Fabrizio Di Pasquale; Luc Thévenaz

doi:10.1117/12.848791

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14 October 2009 Distributed strain and temperature sensing over 50 km of SMF with 1 m spatial resolution employing BOTDA and optical pulse coding

Marcelo A. Soto, Gabriele Bolognini, Fabrizio Di Pasquale, Luc Thévenaz

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Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 750383 (2009) https://doi.org/10.1117/12.848791
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

Abstract

In this paper we demonstrate a long-range distributed strain and temperature optical fiber sensor using Brillouin optical time-domain analysis in conjunction with optical pulse coding. Compared to standard BOTDA, pulse coding provides higher signal-to-noise ratio at the same pump peak power, overcoming the limitations induced by pump depletion and modulation instability, and allowing to achieve a record of 1 meter spatial resolution over 50 km of standard single mode fiber with temperature and strain resolution of 2.2 °C and 44 με respectively.

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Marcelo A. Soto, Gabriele Bolognini, Fabrizio Di Pasquale, and Luc Thévenaz "Distributed strain and temperature sensing over 50 km of SMF with 1 m spatial resolution employing BOTDA and optical pulse coding", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 750383 (14 October 2009); https://doi.org/10.1117/12.848791

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