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

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.


Published in:
Proc. SPIE, 10323, 103230N
Presented at:
25th International Conference on Optical Fiber Sensors, Jeju, Korea, April 24-28, 2017
Year:
2017
Publisher:
New York, SPIE
ISBN:
978-1-5090-4850-2
Keywords:
Laboratories:




 Record created 2017-05-11, last modified 2018-03-17

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