Applications of distributed Brillouin fiber sensing

Luc Thevenaz; Marc Nikles; Alexandre Fellay; Massimo Facchini; Philippe A. Robert

doi:10.1117/12.323342

29 September 1998 Applications of distributed Brillouin fiber sensing

Luc Thevenaz, Marc Nikles, Alexandre Fellay, Massimo Facchini, Philippe A. Robert

Proceedings Volume 3407, International Conference on Applied Optical Metrology; (1998) https://doi.org/10.1117/12.323342
Event: International Conference on Applied Optical Metrology, 1998, Balatonfured, Hungary

Abstract

Long-range distributed strain and temperature measurements along an optical fiber is presented, using a novel optical sensor based on stimulated Brillouin scattering. The optical effect only depends on the fiber material, so that the bare fiber itself acts as sensing element without any special fiber processing or preparation. The sensor accuracy is plus or minus 1 degree Celsius for temperature and plus or minus 20 (mu) (epsilon) for deformation. The spatial resolution is 1 meter and the sensor range is more than 20 km. Successful monitoring of a concrete dam element has been performed using an embedded standard cabled fiber. The temperature dynamics of lake waters have been also observed by simply laying a cable over the lake bed.

Citation Download Citation

Luc Thevenaz, Marc Nikles, Alexandre Fellay, Massimo Facchini, and Philippe A. Robert "Applications of distributed Brillouin fiber sensing", Proc. SPIE 3407, International Conference on Applied Optical Metrology, (29 September 1998); https://doi.org/10.1117/12.323342

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