Modeling of Optical Fibre Temperature Sensor Based on Stimulated Brillouin Scattering

Abstract

Distributed fibre optic sensing presents unique features that have no match in conventional sensing techniques. The ability to measure temperatures and strain at thousands of points along a single fibre is particularly interesting for the monitoring of elongatedstructures such as pipelines, flow lines, oil wells and landslides.This paper presents the analysis by simulation of stimulated Brillouin scattering (SBS) in optical fibres. The behavior of stimulated Brillouin scattering in optical fibres are studied through the backscatter signals.The results show that the backscattered power is low for input power below 5 dBm but increased rapidly above it and saturated above input power of 10 dBm for different fibre lengths. The analysis of parameters affecting backscattered signal power ispresented. The simulation of distributed fibre optic sensor (DFOS) is carried out with the aim of temperature sensing.