Distributed Fiber Optic Sensing Technology and Its Application in Geo-Engineering Monitoring

摘要

The Brilliouin Optical Time Domain Reflectometer (BOTDR) is a newly developed innovative measure technique, which utilizes Brilliouin spectroscopy and Optical Time Domain Reflectometry to measure strain generated in optical fibers as distributed in the longitudinal direction. Because of the BOTDR's distinctive characters, it has been paid more and more attention and began to be applied in monitoring system of various infrastructure engineerings such as tunnels, road embankments and landslide engineerings. In this paper, the operation principle and merits of BOTDR are introduced; its application feasibility on the geo-linear infrastructure health monitoring are analyzed based on authors' research achievements and application cases. The research results show the BOTDR is quite applicable to the geolinear infrastructure health monitoring.