Dynamic BOTDA measurements using Brillouin phase-shift

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Date
2012Version
Acceso abierto / Sarbide irekia
Type
Contribución a congreso / Biltzarrerako ekarpena
Version
Versión aceptada / Onetsi den bertsioa
Impact
|
10.1117/12.975011
Abstract
We demonstrate a novel dynamic BOTDA sensor based, for the first time to our knowledge, on the use of the Brillouin phase-shift instead of the conventional Brillouin gain. This provides the advantage of measurements that are largely immune to variations in fiber attenuation or changes in pump pulse power. Furthermore, the optical detection deployed can lead to an enhanced precision or measurement ...
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We demonstrate a novel dynamic BOTDA sensor based, for the first time to our knowledge, on the use of the Brillouin phase-shift instead of the conventional Brillouin gain. This provides the advantage of measurements that are largely immune to variations in fiber attenuation or changes in pump pulse power. Furthermore, the optical detection deployed can lead to an enhanced precision or measurement time and to the broadening of the measurement range. Proof of concept experiments demonstrate 1.66 kHz measurement rate with 1 m resolution over a 160 m sensing fiber length. [--]
Subject
Dynamic distributed measurements,
Brillouin phase shift,
BOTDA,
Strain measurements,
Distributed fiber sensor
Publisher
SPIE
Published in
Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 842125 (October 4, 2012)
Departament
Universidad Pública de Navarra. Departamento de Ingeniería Eléctrica y Electrónica /
Nafarroako Unibertsitate Publikoa. Ingeniaritza Elektrikoa eta Elektronikoa Saila
Publisher version
Sponsorship
The authors wish to acknowledge financial support from the Spanish Ministerio de Educación y Ciencia through the
project TEC2010-20224-C02-01 and from the Universidad Pública de Navarra.