Calibration of a Distributed Temperature Sensor in Optical Fiber Based on OFDR

Leonardo Santos Magalhães; Rafael Andrade Vieira; Milena Ventura; Valéria Loureiro da Silva

doi:10.34178/jbth.v8i5.538

Leonardo Santos Magalhães
Rafael Andrade Vieira
Milena Ventura
Valéria Loureiro da Silva

DOI: https://doi.org/10.34178/jbth.v8i5.538

Keywords: Optical Fiber, OFDR, Calibration, Temperature Sensing

Abstract

Optical Frequency Domain Reflectometry (OFDR) is a distributed sensing technique that uses a laser to sweep the frequency of light and record the backscattered signal along an optical fiber. Equipment such as the ODISI 6101 by LUNA employs this method for strain and temperature measurement. The present work aims to present a calibration method for an optical fiber distributed temperature sensor based on OFDR, through experimental bench tests, resulting in an equation describing the relationship between temperature and spectral shift for temperature measurement.