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 $2.2°\text{C}/44\mu \epsilon$, respectively.

© 2010 Optical Society of America

Long-range simplex-coded BOTDA sensor over 120km distance employing optical preamplification

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High-resolution DPP-BOTDA over 50 km LEAF using return-to-zero coded pulses

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Optimization of a DPP-BOTDA sensor with 25 cm spatial resolution over 60 km standard single-mode fiber using Simplex codes and optical pre-amplification

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Analysis of pulse modulation format in coded BOTDA sensors

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Cyclic pulse coding for fast BOTDA fiber sensors

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