Recent progress towards centimetric spatial resolution in distributed fibre sensing
- Authors
- Thévenaz, Luc; Foaleng-Mafang, Stella; Song, Kwang-Yong; Chin, Sanghoon; Beugnot, Jean-Charles; Primerov, Nikolay; Tur, Moshe
- Issue Date
- 2010
- Keywords
- Distributed fibre sensor; Fibre optics; Nonlinear optics; Optical fibre sensor; Stimulated Brillouin scattering
- Citation
- Proceedings of SPIE - The International Society for Optical Engineering, v.7653
- Journal Title
- Proceedings of SPIE - The International Society for Optical Engineering
- Volume
- 7653
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/49467
- DOI
- 10.1117/12.868432
- ISSN
- 0277-786X
- 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. © 2010 SPIE.
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Collections - College of Natural Sciences > Department of Physics > 1. Journal Articles
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