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  • 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference
  • OSA Technical Digest (Optica Publishing Group, 2019),
  • paper ch_13_5

Phase-Coded Brillouin Optical Correlation Domain Analysis for Extreme Temperature Sensing

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Abstract

Nowadays predictive maintenance is considered a key feature for industrial applications, so that unscheduled shutdowns of plants and machinery can be avoided and their lifetime extended. In this framework there is an increasing demand for sensing systems able to provide a detailed mapping of temperature/strain with high accuracy (±1°C) and high spatial resolution (in the order of a few centimeters) on relatively short lengths around 100 meters. As an example, for the monitoring of industrial boilers and steam headers, running at constant operating temperatures of 400-600 °C, no commercial sensors are able to provide distributed real-time temperature information with the desired spatial resolution. In this frame, Phase-Coded Brillouin Optical Correlation Domain Analysis (phase-BOCDA) [1] technique can prove to be a promising solution. The present work aims at demonstrating the ability of a fiber-optic phase-BOCDA sensor, described in [2], to reliably reconstruct temperature profiles up to 600°C with a 2-cm spatial resolution.

© 2019 IEEE

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