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Simplified distributed temperature sensor using stimulated Brillouin scattering

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Abstract

A new scheme for distributed fiber sensing of temperature profiles is presented. The realized sensor is based on the generation of stimulated Brillouin scattering by a multiple-frequency Nd:YLF laser, having a mode difference frequency close to the Brillouin frequency shift. The resulting low- frequency Brillouin beat signal allows the realization of a simplified detection scheme, employing a low-cost detector and conventional signal processing techniques.

© 1996 IEICE

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