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

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URI: http://hdl.handle.net/10902/9634
ISSN: 0277-786X
ISSN: 1996-756X
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Autoría
Urricelqui Polvorinos, Javier; Ruiz Lombera, RubénAutoridad Unican; Sagues García, Miguel; Mirapeix Serrano, Jesús MaríaAutoridad Unican; López Higuera, José MiguelAutoridad Unican; Loayssa Lara, Alayn
Fecha
2015
Derechos
© 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.
Publicado en
Proceedings of SPIE 9634, 963487
24th International Conference on Optical Fibre Sensors, Curitiba, Brasil, 2015
Editorial
SPIE Society of Photo-Optical Instrumentation Engineers
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Palabras clave
Brillouin distributed sensors
Brillouin optical time domain analysis
Brillouin threshold
Resumen/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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