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Proceedings Paper

Simple method for the elimination of polarization noise in BOTDA using balanced detection of orthogonally polarized Stokes and anti-Stokes probe sidebands
Author(s): Alexia López-Gil; Alejandro Domínguez-López; Sonia Martín-López; Miguel González-Herráez
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Paper Abstract

Given the strong polarization sensitivity of Stimulated Brillouin Scattering (SBS), in Brillouin Optical Time Domain Analysis (BOTDA) it turns out to be indispensable to perform some kind of polarization scrambling, either in the pump pulse, or the probe signal (or both). This is usually accomplished using polarization scrambling/switching systems, which, being mechanical, tend to be not as robust as it would be desirable. In this paper we propose a completely passive system, with no moving parts, to perform the polarization scrambling in a BOTDA. It is based on the use of balanced detection among the orthogonally polarized Stokes and anti-Stokes bands of the probe signal. The setup requires no alignment and provides a performance similar to a conventional BOTDA sensor.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91573U (2 June 2014); doi: 10.1117/12.2059522
Show Author Affiliations
Alexia López-Gil, Univ. de Alcalá (Spain)
Alejandro Domínguez-López, Univ. de Alcalá (Spain)
Sonia Martín-López, Univ. de Alcalá (Spain)
Miguel González-Herráez, Univ. de Alcalá (Spain)

Published in SPIE Proceedings Vol. 9157:
23rd International Conference on Optical Fibre Sensors
José M. López-Higuera; Julian D. C. Jones; Manuel López-Amo; José Luis Santos, Editor(s)

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