Enhancing the measurement range of a Brillouin-based fiber optic distributed-temperature sensor by improving receiver sensitivity through optical preamplification

Keith P. De Souza; Trevor P. Newson

doi:10.1117/12.573259

14 December 2004 Enhancing the measurement range of a Brillouin-based fiber optic distributed-temperature sensor by improving receiver sensitivity through optical preamplification

Keith P. De Souza, Trevor P. Newson

Author Affiliations +

Proceedings Volume 5589, Fiber Optic Sensor Technology and Applications III; (2004) https://doi.org/10.1117/12.573259
Event: Optics East, 2004, Philadelphia, Pennsylvania, United States

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.

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Keith P. De Souza and Trevor P. Newson "Enhancing the measurement range of a Brillouin-based fiber optic distributed-temperature sensor by improving receiver sensitivity through optical preamplification", Proc. SPIE 5589, Fiber Optic Sensor Technology and Applications III, (14 December 2004); https://doi.org/10.1117/12.573259

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