Urricelqui Polvorinos, JavierZornoza Indart, AnderSagüés García, MikelLoayssa Lara, Alayn2016-11-152016-11-1520121094-408710.1364/OE.20.026942https://academica-e.unavarra.es/handle/2454/22698We demonstrate a novel dynamic BOTDA sensor based, for the first time to our knowledge, on the use of the Brillouin phase shift in addition to the conventional Brillouin gain. This provides the advantage of measurements that are largely immune to variations in fiber attenuation or changes in pump pulse power. Furthermore, the optical detection deployed leads to an enhanced precision or measurement time and to the broadening of the measurement range. Proof of concept experiments demonstrate 1.66 kHz measurement rate with 1 m resolution over a 160 m sensing fiber length. Moreover, a measurement range of 2560 µε with a precision of 20 µε is successfully proved.application/pdfeng© 2012 Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.Stimulated Brillouin scatteringFiber optics sensorsHeterodyneBrillouin distributed sensorsBrillouin optical time domain analysisinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccess