%0 Journal Article %A Domínguez López, Alejandro %A Angulo Vinuesa, Xabier %A López Gil, Alexia Inés %A Martín López, Sonia %A González Herráez, Miguel %T Unexpected non-local effects in dual-probe-sideband BOTDA %D 2015 %@ 0277-786X %U http://hdl.handle.net/10017/27548 %X Until now, non-local effects in dual-probe-sideband Brillouin Optical Time Domain Analysis (BOTDA) systems have been considered negligible if the probe power is below the Stimulated Brillouin Scattering (SBS) threshold. In this paper, we show the appearance of non-local effects even below the SBS threshold. The pump pulse experiences a frequencydependent spectral deformation that affects the readout process differently in the gain and loss configurations. The main conclusion of our study is that the measurements in gain configuration are more robust to this non-local effect than the loss configuration. These results are of particular interest for manufacturers of long-range BOTDA systems. %K Brillouin scattering %K Fiber optics sensors %K Nonlinear optics %K Ciencias tecnológicas %K Electrónica %K Technology %K Electronics %~ Biblioteca Universidad de Alcala