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28 September 2015 Overcoming non-local effects and Brillouin threshold limitations in Brillouin distributed sensors
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Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 963487 (2015) https://doi.org/10.1117/12.2205448
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil
Abstract
We 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.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Javier Urricelqui, Rubén Ruiz-Lombera, Mikel Sagues, Jesús Mirapeix, José M. López-Higuera, and Alayn Loayssa "Overcoming non-local effects and Brillouin threshold limitations in Brillouin distributed sensors", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 963487 (28 September 2015); https://doi.org/10.1117/12.2205448
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