Overcoming non-local effects and Brillouin threshold limitations in Brillouin distributed sensors

Javier Urricelqui; Rubén Ruiz-Lombera; Mikel Sagues; Jesús Mirapeix; José M. López-Higuera; Alayn Loayssa

doi:10.1117/12.2205448

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28 September 2015 Overcoming non-local effects and Brillouin threshold limitations in Brillouin distributed sensors

Javier Urricelqui, Rubén Ruiz-Lombera, Mikel Sagues, Jesús Mirapeix, José M. López-Higuera, Alayn Loayssa

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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.

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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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