Title :
High-Spatial-Resolution Time-Domain Simultaneous Strain and Temperature Sensor Using Brillouin Scattering and Birefringence in a Polarization-Maintaining Fiber
Author :
Dong, Yongkang ; Chen, Liang ; Bao, Xiaoyi
Author_Institution :
Dept. of Phys., Univ. of Ottawa, Ottawa, ON, Canada
Abstract :
We report on a high-spatial-resolution simultaneous strain and temperature measurement in time domain through measuring Brillouin frequency shift (BFS) and birefringence-induced frequency shift (BireFS) in a polarization-maintaining fiber. High-spatial-resolution BFS and BireFS measurement are obtained through differential pulsewidth pair Brillouin optical time-domain analysis and a local Brillouin grating, respectively. Simultaneous strain and temperature measurement with a spatial resolution of 20 cm is demonstrated in a 6-m Panda fiber. The temperature and strain accuracy is 0.4°C and 9 με, and their range can be up to 700°C and 14 mε, respectively.
Keywords :
birefringence; fibre optic sensors; optical fibre polarisation; stimulated Brillouin scattering; strain sensors; temperature sensors; Brillouin frequency shift; Brillouin scattering; birefringence-induced frequency shift; differential pulsewidth pair Brillouin optical time-domain analysis; local Brillouin grating; polarization-maintaining fiber; temperature sensor; time-domain simultaneous strain sensor; Birefringence; Brillouin scattering; Capacitive sensors; Frequency; Optical fiber polarization; Optical fiber sensors; Strain measurement; Temperature measurement; Temperature sensors; Time domain analysis; Birefringence; Brillouin scattering; polarization-maintaining fiber (PMF); strain measurement; temperature measurement;
Journal_Title :
Photonics Technology Letters, IEEE
Conference_Location :
7/8/2010 12:00:00 AM
DOI :
10.1109/LPT.2010.2056678
