Analysis of strain underestimation due to pulse base in a BOTDA sensor system

摘要

This article presents a pulse base effect on the Brillouin gain spectrum that can be obtained by BOTDA, which uses a pump-probe system. For theoretical analysis of the pulse base effect, we propose a theoretical model in which the interaction between the pulse base and probe light is taken into consideration. Strain underestimation caused by the pulse base is demonstrated by experiments and theoretical simulations.