High-Temperature Measurement with Brillouin Optical Time Domain Analysis of an Annealed Fused-Silica Single-Mode Fiber
The effect of annealing is experimentally studied for a fused silica, fully distributed fiber optic sensor based on the pulse pre-pump Brillouin optical time domain analysis (PPP-BOTDA). Within a heating rate of 4.3°C/min and 30.6°C/min, and a sustained peak temperature for 120 and 240 min, annealing extended the sensor's upper operation temperature from 800°C to 1000°C and reduced the sensor's measurement variability over a temperature range of 22°C to 1000°C with a maximum Brillouin frequency variation of 1%. The annealed sensor had a linearly decreasing Brillouin frequency sensitivity from 1.349 x 10-3 GHz/°C at 22°C to 0.419 x 10-3 GHz/°C at 1000°C. The time required to achieve a stable annealing effect decayed exponentially with annealing temperature.
Y. Bao and G. Chen, "High-Temperature Measurement with Brillouin Optical Time Domain Analysis of an Annealed Fused-Silica Single-Mode Fiber," Optics Letters, vol. 41, no. 14, pp. 3177-3180, Optical Society of America, Jul 2016.
The definitive version is available at https://doi.org/10.1364/OL.41.003177
Civil, Architectural and Environmental Engineering
Keywords and Phrases
Fiber Optic Sensors; Fused Silica; Optical Pumping; Silica; Single Mode Fibers; Temperature Measurement; Annealing Temperatures; Brillouin Frequency; Brillouin Optical Time Domain Analysis; Distributed Fiber Optic Sensor; Effect Of Annealing; High Temperature Measurement; Operation Temperature; Temperature Range; Time Domain Analysis
International Standard Serial Number (ISSN)
Article - Journal
© 2016 Optical Society of America, All rights reserved.