Dynamic BOTDA measurements based on Brillouin phase-shift and RF demodulation
Fecha
2012Versión
Acceso abierto / Sarbide irekia
Tipo
Artículo / Artikulua
Versión
Versión publicada / Argitaratu den bertsioa
Impacto
|
10.1364/OE.20.026942
Resumen
We demonstrate a novel dynamic BOTDA sensor based, for the first time to our knowledge, on the use of the Brillouin phase shift in addition to 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 leads to an enhanced precision or measuremen ...
[++]
We demonstrate a novel dynamic BOTDA sensor based, for the first time to our knowledge, on the use of the Brillouin phase shift in addition to 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 leads 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. Moreover, a measurement range of 2560 µε with a precision of 20 µε is successfully proved. [--]
Materias
Stimulated Brillouin scattering,
Fiber optics sensors,
Heterodyne,
Brillouin distributed sensors,
Brillouin optical time domain analysis
Editor
Optical Society of America
Publicado en
Optics Express, Vol. 20, Issue 24, pp. 26942-26949 (2012)
Departamento
Universidad Pública de Navarra. Departamento de Ingeniería Eléctrica y Electrónica /
Nafarroako Unibertsitate Publikoa. Ingeniaritza Elektrikoa eta Elektronikoa Saila
Versión del editor
Entidades Financiadoras
The authors wish to acknowledge the financial support from the Spanish Ministerio de
Educación y Ciencia through the project TEC2010-20224-C02-01 and from the Universidad
Pública de Navarra.