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Proceedings Paper

Enhancing the measurement range of a Brillouin-based fiber optic distributed-temperature sensor by improving receiver sensitivity through optical preamplification
Author(s): Keith P. De Souza; Trevor P. Newson
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Paper Abstract

We report on the use of a cost-effective erbium-doped based optical preamplifier in a single-ended distributed fiber-optic sensor to improve receiver sensitivity and hence measurement range. The improved accuracy of spontaneous Brillouin measurements was demonstrated in a 23km sensor and was limited by amplified spontaneous emission from the preamplifier, which was verified theoretically. Reduction of amplified spontaneous emission was achieved with a 0.37nm in-fiber Bragg grating. A signal-to-noise improvement of 17dB was achieved and supported by theory, which translates to approximately 40km range improvement for a single-mode sensing fiber having losses of 0.2dB/km at 1550nm.

Paper Details

Date Published: 14 December 2004
PDF: 12 pages
Proc. SPIE 5589, Fiber Optic Sensor Technology and Applications III, (14 December 2004); doi: 10.1117/12.573259
Show Author Affiliations
Keith P. De Souza, Univ. of the West Indies (Trinidad)
Trevor P. Newson, Univ. of Southampton (United Kingdom)

Published in SPIE Proceedings Vol. 5589:
Fiber Optic Sensor Technology and Applications III
Michael A. Marcus; Brian Culshaw; John P. Dakin, Editor(s)

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