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Proceedings Paper

Gain dependence of measured spectra in coherent Brillouin optical time-domain analysis sensors
Author(s): Jon Mariñelarena; Javier Urricelqui; Alayn Loayssa
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Paper Abstract

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.

Paper Details

Date Published: 30 May 2016
PDF: 4 pages
Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 991636 (30 May 2016); doi: 10.1117/12.2236931
Show Author Affiliations
Jon Mariñelarena, Univ. Pública de Navarra (Spain)
Javier Urricelqui, Univ. Pública de Navarra (Spain)
Alayn Loayssa, Univ. Pública de Navarra (Spain)

Published in SPIE Proceedings Vol. 9916:
Sixth European Workshop on Optical Fibre Sensors
Elfed Lewis, Editor(s)

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