Urricelqui Polvorinos, JavierRuiz Lombera, RubénSagüés García, MikelMirapeix, JesúsLópez Higuera, José MiguelLoayssa Lara, Alayn2016-11-152016-11-152015Javier Urricelqui ; Rubén Ruiz-Lombera ; Mikel Sagues ; Jesús Mirapeix ; José M. López-Higuera, et al. "Overcoming non-local effects and Brillouin threshold limitations in Brillouin distributed sensors", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 963487 (September 28, 2015)0277-786X (Print)1996-756X (Electronic)10.1117/12.2205448https://academica-e.unavarra.es/handle/2454/22705We demonstrate, for the first time to our knowledge, a Brillouin optical time domain analysis sensor that is able to operate with a probe power larger than the Brillouin threshold of the deployed sensing fiber and that is free from detrimental non-local effects. The technique is based on a dual-probe-sideband setup in which a frequency modulation of the probes waves along the fiber is introduced. This makes the frequency of maximum interaction between pump and probes to vary along the fiber, thus mitigating the pump pulse depletion and making it possible to use very large probe power, which brings an improved signal-to-noise ratio in detection.application/pdfengCopyright 2015 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.Brillouin distributed sensorsBrillouin optical time domain analysisBrillouin thresholdinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/openAccess