Gain dependence of measured spectra in coherent Brillouin optical time-domain analysis sensors
Fecha
2016Versión
Acceso abierto / Sarbide irekia
Tipo
Contribución a congreso / Biltzarrerako ekarpena
Versión
Versión aceptada / Onetsi den bertsioa
Impacto
|
10.1117/12.2236931
Resumen
We report on the effects of large pump pulse powers on Brillouin optical time-domain analysis (BOTDA) sensors based on phase-modulated probe wave and coherent detection. It is found that the large Brillouin gain that comes from the use of high power pulses induces a narrowing of the RF phase-shift spectrum that is measured in these sensors. This narrowing leads to a Brillouin frequency shift meas ...
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We report on the effects of large pump pulse powers on Brillouin optical time-domain analysis (BOTDA) sensors based on phase-modulated probe wave and coherent detection. It is found that the large Brillouin gain that comes from the use of high power pulses induces a narrowing of the RF phase-shift spectrum that is measured in these sensors. This narrowing leads to a Brillouin frequency shift measurement error when the sensor is configured for dynamic measurements. However, the effect has been found to be less significant than that observed in dynamic slope-assisted BOTDA sensors based on amplitude. [--]
Materias
Brillouin scattering,
Brillouin optical time-domain analysis,
Coherent sensors,
Dynamic sensing
Editor
SPIE
Publicado en
Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 991636 (May 30, 2016)
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 Economía y Competitividad
through the project TEC2013-47264-C2-2-R, FEDER funds and Universidad Pública de Navarra.