Recent progress towards centimetric spatial resolution in distributed fibre sensing

Luc Thévenaz; Stella Foaleng-Mafang; Kwang-Yong Song; Sanghoon Chin; Jean-Charles Beugnot; Nikolay Primerov; Moshe Tur

doi:10.1117/12.868432

8 September 2010 Recent progress towards centimetric spatial resolution in distributed fibre sensing

Luc Thévenaz, Stella Foaleng-Mafang, Kwang-Yong Song, Sanghoon Chin, Jean-Charles Beugnot, Nikolay Primerov, Moshe Tur

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.

Citation Download Citation

Luc Thévenaz, Stella Foaleng-Mafang, Kwang-Yong Song, Sanghoon Chin, Jean-Charles Beugnot, Nikolay Primerov, and 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); https://doi.org/10.1117/12.868432

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