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Proceedings Paper

Simultaneous temperature and strain measurement with bandwidth and peak of the Brillouin spectrum in LEAF fiber
Author(s): Xuan Liu; Xiaoyi Bao
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Paper Abstract

Leaf fiber's Brillouin gain spectrum characteristics such as peak power and line-width are studied under different strain and temperature conditions. We compared these results with those of SMF and explained the similarities and differences. They are attributed to the dependence of refractive index, density, acoustic velocity, effective length and effective area on strain and temperature. Besides the acoustic waveguide structure is also applied to explain the different behaviors of LEAF and SMF. Based on the linear relationships between the four peaks' line-width and strain/temperature the strain and temperature errors of using each peak's Brillouin frequency shift and line-width are calculated. We achieved a strain error of 36.91με and a temperature error of 1.84°C with a spatial resolution of 4m. This provides another way of measuring the temperature and strain simultaneously using LEAF fiber's bandwidth and peak frequency.

Paper Details

Date Published: 17 May 2011
PDF: 4 pages
Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 775328 (17 May 2011); doi: 10.1117/12.887441
Show Author Affiliations
Xuan Liu, Univ. of Ottawa (Canada)
Xiaoyi Bao, Univ. of Ottawa (Canada)


Published in SPIE Proceedings Vol. 7753:
21st International Conference on Optical Fiber Sensors

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