8 September 2010 Recent progress towards centimetric spatial resolution in distributed fibre sensing
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Proceedings Volume 7653, Fourth European Workshop on Optical Fibre Sensors; 765309 (2010) https://doi.org/10.1117/12.868432
Event: (EWOFS'10) Fourth European Workshop on Optical Fibre Sensors, 2010, Porto, Portugal
Abstract
Optical fibre sensors based on stimulated Brillouin scattering have now clearly demonstrated their excellent capability for long-range distributed strain and temperature measurements. The fibre is used as sensing element and a value for temperature and/or strain can be obtained from any point along the fibre. While classical configurations have practically a spatial resolution limited by the phonon lifetime to 1 meter, novel approaches have been demonstrated these past years that can overcome this limit. This can be achieved either by the prior activation of the acoustic wave by a long lasting pre-pumping signal, leading to the optimized configuration using Brillouin echoes, or by probing a classically generated steady acoustic wave using a ultra-short pulse propagating in the orthogonal polarization of a highly birefringent fibre. These novel configurations can offer spatial resolutions in the centimetre range, while preserving the full accuracy on the determination of temperature and strain.
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Luc Thévenaz, Luc Thévenaz, Stella Foaleng-Mafang, Stella Foaleng-Mafang, Kwang-Yong Song, Kwang-Yong Song, Sanghoon Chin, Sanghoon Chin, Jean-Charles Beugnot, Jean-Charles Beugnot, Nikolay Primerov, Nikolay Primerov, Moshe Tur, Moshe Tur, } "Recent progress towards centimetric spatial resolution in distributed fibre sensing", Proc. SPIE 7653, Fourth European Workshop on Optical Fibre Sensors, 765309 (8 September 2010); doi: 10.1117/12.868432; https://doi.org/10.1117/12.868432
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