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 °C at the front end and increased to less than 13 °C at 50 km with Raman pulse amplification.
© 2003 Optical Society of America
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(190.5650) Nonlinear optics : Raman effect
(290.1350) Scattering : Backscattering
(290.5830) Scattering : Scattering, Brillouin
Y. T. Cho, M. Alahbabi, M. J. Gunning, and T. P. Newson, "50-km single-ended spontaneous-Brillouin-based distributed-temperature sensor exploiting pulsed Raman amplification," Opt. Lett. 28, 1651-1653 (2003)