Brillouin gain spectrum characteristics for temperature compensation in fiber optic distributed strain sensor

Aleksander Wosniok

doi:10.1117/12.974841

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7 November 2012 Brillouin gain spectrum characteristics for temperature compensation in fiber optic distributed strain sensor

Aleksander Wosniok

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Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84219T (2012) https://doi.org/10.1117/12.974841
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

We studied Brillouin gain spectrum characteristics in single-mode optical fibers with different refractive index profiles to realize temperature-corrected distributed strain measurement. The measured Brillouin frequency shift (BFS) features much stronger dependence on the longitudinal strain in the sensor fiber than on the temperature distribution along the fiber optic sensor. By detection of slight structural changes in monitored civil structures, such as dams, pipelines and tunnels, the influence of temperature on the measured BFS cannot be neglected.

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Aleksander Wosniok "Brillouin gain spectrum characteristics for temperature compensation in fiber optic distributed strain sensor", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84219T (7 November 2012); https://doi.org/10.1117/12.974841

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