Concepedia

Simplex-coded BOTDA fiber sensor with 1 m spatial resolution over a 50 km range

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

Optics Letters · 2010 · 241 citations · 6 references

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Abstract

In this Letter, we propose the use of optical pulse coding techniques for long-range distributed sensors based on Brillouin optical time-domain analysis (BOTDA). Compared to conventional BOTDA sensors, optical coding provides a significant sensing-range enhancement, allowing for temperature and strain measurements with 1 m spatial resolution over 50 km of standard single-mode fiber, with an accuracy of 2.2 degrees C/44 muepsilon, respectively.

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