Loayssa Lara, AlaynUrricelqui Polvorinos, JavierIribas Pardo, HaritzMariñelarena Ollacarizqueta, JonMompó Roselló, Juan José2019-04-252019-04-252019Alayn Loayssa, Javier Urricelqui, Haritz Iribas, Jon Mariñelarena, and Juan José Mompó "Latest research on long-range Brillouin distributed sensing", Proc. SPIE 10934, Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology, 109340K (1 March 2019); doi: 10.1117/12.2515598; https://doi.org/10.1117/12.2515598.10.1117/12.2515598https://academica-e.unavarra.es/handle/2454/32949We review the latest developments in long-range Brillouin optical time-domain analysis sensors. The factors that impair the performance of these sensors, particularly in terms of their distance range, are discussed together with the latest methods to overcome them. We focus on our recent contributions based on the application of the probe dithering method, which is based on introducing a wavelength modulation to the probe wave. This technique is shown to effectively compensate nonlocal effects originated in the depletion of the pump pulse as well as of its pedestal. In addition, it can provide amplification to the pump wave with a slight modification of the setup. Furthermore, this method can be combined with pump pulse coding and a new technique for coding linearization that we have devised to further extend the sensing length into the hundreds of kilometers range.12 p.application/pdfeng© (2019) Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this publication for a fee or for commercial purposes, or modification of the contents of the publication are prohibited.Brillouin distributed sensorsBrillouin optical time domain analysisFiber optics sensorsContribución a congreso / Biltzarrerako ekarpenaAcceso abierto / Sarbide irekiainfo:eu-repo/semantics/openAccess