Distributed fiber-optic sensor for detection and localization of acoustic vibrations

Abstract

A sensing system utilizing the standard optical fiber as a distributed sensor for detection and localization of the mechanical vibrations is presented. Vibrations can be caused by various external factors like moving people, cars, trains, and other objects producing mechanical vibrations that are sensed by a fiber. In our laboratory we have designed a sensing system based on phase -OTDR (phase sensitive Optical Time Domain Reflectometry) using extremely narrow laser and EDFAs.A sensing system utilizing the standard optical fiber as a distributed sensor for detection and localization of the mechanical vibrations is presented. Vibrations can be caused by various external factors like moving people, cars, trains, and other objects producing mechanical vibrations that are sensed by a fiber. In our laboratory we have designed a sensing system based on phase -OTDR (phase sensitive Optical Time Domain Reflectometry) using extremely narrow laser and EDFAs.