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50-km single-ended spontaneous-Brillouin-based distributed-temperature sensor exploiting pulsed Raman amplification
Y T Cho1, M Alahbabi, M J Gunning
1Optoelectronics Research Centre, University of Southampton, Southampton, SO17 1BJ, United Kingdom. ytc@orc.soton.ac.uk
Optics Letters
|September 19, 2003
Abstract:
We demonstrate enhanced performance of a single-ended spontaneous-Brillouin-intensity-based distributed-temperature sensor with a sensing length of 50 km and a spatial resolution of 15 m by use of Raman amplification of the probe pulse within the sensing fiber. The Raman amplification was achieved with a copropagating pump pulse at 1450 nm. The standard deviation error of the temperature resolution was 1 degree C at the front end and increased to less than 13 degrees C at 50 km with Raman pulse amplification.