TY - GEN
T1 - Recent progress towards centimetric spatial resolution in distributed fibre sensing
AU - Thévenaz, Luc
AU - Foaleng-Mafang, Stella
AU - Song, Kwang Yong
AU - Chin, Sanghoon
AU - Beugnot, Jean Charles
AU - Primerov, Nikolay
AU - Tur, Moshe
PY - 2010
Y1 - 2010
N2 - 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.
AB - 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.
KW - Distributed fibre sensor
KW - Fibre optics
KW - Nonlinear optics
KW - Optical fibre sensor
KW - Stimulated Brillouin scattering
UR - http://www.scopus.com/inward/record.url?scp=77957840339&partnerID=8YFLogxK
U2 - 10.1117/12.868432
DO - 10.1117/12.868432
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AN - SCOPUS:77957840339
SN - 9780819480835
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Fourth European Workshop on Optical Fibre Sensors
Y2 - 8 September 2010 through 10 September 2010
ER -