High-Temperature Measurement with Brillouin Optical Time Domain Analysis of an Annealed Fused-Silica Single-Mode Fiber

Abstract

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.

Department(s)

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)

0146-9592

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2016 Optical Society of America, All rights reserved.

Publication Date

01 Jul 2016

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