23 April 2017 Discrimination of temperature and strain by combined refractive index and birefringence measurements using coherent Rayleigh sensing
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Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103230N (2017) https://doi.org/10.1117/12.2264636
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of
Abstract
Temperature and strain discrimination is experimentally demonstrated in an elliptical-core polarization-maintaining fiber by making use of Rayleigh-based distributed birefringence measurements and the frequency shift of the correlation peak obtained by standard coherent optical time-domain reflectometry. The high sensitivity of coherent Rayleigh sensing and the very distinct behavior of birefringence makes the two quantities clearly discriminated, resulting in temperature and strain accuracies of ~ 40 mK and ~ 0.5 με, respectively, for distributed measurements with a 2 m spatial resolution.
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Xin Lu, Xin Lu, Marcelo A. Soto, Marcelo A. Soto, Luc Thévenaz, Luc Thévenaz, } "Discrimination of temperature and strain by combined refractive index and birefringence measurements using coherent Rayleigh sensing", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103230N (23 April 2017); doi: 10.1117/12.2264636; https://doi.org/10.1117/12.2264636
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