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Proceedings Paper

Phasorial DPP-BOTDA sensor tolerant to non-local effects
Author(s): Javier Urricelqui; Jon Mariñelarena; Mikel Sagues; Alayn Loayssa
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Paper Abstract

We introduce a modification of the differential pulse-width pair technique in a BOTDA sensor based on a phase-modulated probe wave and RF demodulation. This provides a differential Brillouin phasorial signal with high spatial and spectral resolution in both components (magnitude and phase-shift). Moreover, the use of a phase-modulated probe wave provides RF phase-shift measurements tolerant to the emergence of non-local effects. The combination of both techniques can lead to the development of long-range BOTDA sensors. Proof-of-concept experiments demonstrate RF phase-shift measurements with 1m spatial resolution over 50km and an uncertainty of 1.3ºC at the worst contrast position.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91575U (2 June 2014); doi: 10.1117/12.2059068
Show Author Affiliations
Javier Urricelqui, Univ. Pública de Navarra (Spain)
Jon Mariñelarena, Univ. Pública de Navarra (Spain)
Mikel Sagues, Univ. Pública de Navarra (Spain)
Alayn Loayssa, Univ. Pública de Navarra (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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