Discrimination of temperature and strain by combined refractive index and birefringence measurements using coherent Rayleigh sensing

Xin Lu; Marcelo A. Soto; Luc Thévenaz

doi:10.1117/12.2264636

23 April 2017 Discrimination of temperature and strain by combined refractive index and birefringence measurements using coherent Rayleigh sensing

Xin Lu, Marcelo A. Soto, Luc Thévenaz

Author Affiliations +

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, Marcelo A. Soto, and 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); https://doi.org/10.1117/12.2264636

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