TY - JOUR
T1 - Temperature-dependent strain and temperature sensitivities of fused silica single mode fiber sensors with pulse pre-pump Brillouin optical time domain analysis
AU - Bao, Yi
AU - Chen, Genda
N1 - Publisher Copyright:
© 2016 IOP Publishing Ltd.
PY - 2016/4/19
Y1 - 2016/4/19
N2 - This paper reports a distributed temperature and strain sensor based on pulse pre-pump Brillouin optical time domain analysis. An uncoated, telecom-grade fused silica single-mode fiber as a distributed sensor was calibrated for its sensitivity coefficients under various strains and temperatures up to 800 °C. The Brillouin frequency of fiber samples changed nonlinearly with temperature and linearly with strain. The temperature sensitivity decreased from 1.113 to 0.830 MHz /°C in the range of 22-800 °C. The strain sensitivity was reduced from 0.054 to 0.042 MHz /μϵ as the temperature increased from 22 to 700 °C and became unstable at higher temperatures due to creep effect. The strain measurement range was reduced from 19 100 to 6000 μϵ in the temperature range of 22-800 °C due to fused silica's degradation. The calibrated fiber optic sensor demonstrated adequate accuracy and precision for strain and temperature measurements and stable performance in heating-cooling cycles. It was validated in an application setting.
AB - This paper reports a distributed temperature and strain sensor based on pulse pre-pump Brillouin optical time domain analysis. An uncoated, telecom-grade fused silica single-mode fiber as a distributed sensor was calibrated for its sensitivity coefficients under various strains and temperatures up to 800 °C. The Brillouin frequency of fiber samples changed nonlinearly with temperature and linearly with strain. The temperature sensitivity decreased from 1.113 to 0.830 MHz /°C in the range of 22-800 °C. The strain sensitivity was reduced from 0.054 to 0.042 MHz /μϵ as the temperature increased from 22 to 700 °C and became unstable at higher temperatures due to creep effect. The strain measurement range was reduced from 19 100 to 6000 μϵ in the temperature range of 22-800 °C due to fused silica's degradation. The calibrated fiber optic sensor demonstrated adequate accuracy and precision for strain and temperature measurements and stable performance in heating-cooling cycles. It was validated in an application setting.
KW - PPP-BOTDA
KW - distributed fiber optic sensor
KW - high temperature
KW - strain and temperature sensitivity coefficients
KW - thermal expansion
KW - thermo-mechanical interaction
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U2 - 10.1088/0957-0233/27/6/065101
DO - 10.1088/0957-0233/27/6/065101
M3 - Article
AN - SCOPUS:84969872666
SN - 0957-0233
VL - 27
JO - Measurement Science and Technology
JF - Measurement Science and Technology
IS - 6
M1 - 065101
ER -