Pulse shapes effects on backscattering Brillouin gain for distributed fiber sensing

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URI: http://hdl.handle.net/10902/2355
ISSN: 1996-756X
ISSN: 0277-786X
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Autoría
Galíndez Jamioy, Carlos Augusto; Lázaro Urrutia, José Miguel; García Allende, Pilar Beatriz; Madruga Saavedra, Francisco JavierAutoridad Unican; López Higuera, José MiguelAutoridad Unican
Fecha
2007-07-02
Derechos
© 2007 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, 2007, vol. 6619, 66193A
Third European Workshop on Optical Fibre Sensors, Nápoles, 2007
Editorial
SPIE Society of Photo-Optical Instrumentation Engineers
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Palabras clave
Brillouin gain scattering
Pump pulse shape
Pump probe interaction
Continuous wave
Resumen/Abstract
Distributed fiber sensing based on Brillouin gain scattering (BGS) principle is a useful way to develop devices capable to measure temperature and/or strain in optical fibers. In these distributed sensors, spatial resolution is a topic of special interest in the distributed fiber sensing field. The influence of the probe-pulse shape in the interaction between the pulsed light and the continuous wave laser in a pump-probe system. This study has the purpose of improving the spatial resolution of the measurement without losing stability in the BGS is presented. Also it is showed how the backscattering Brillouin gain is affected by inducing variations on the final value of the BGS intensity. Theoretical analysis of the probe pulse in the Brillouin shift and intensity values using triangular, sinusoidal and saw tooth shapes around the phonon lifetime (~10ns) are presented; and also considerations and conclusions are explained.
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