Distributed sensor of vibration in fibre optic Michelin's interferometer configuration

摘要

The subject of this work is a novel fibre optic distributed sensor system. The system uses a technique called multiplexed reflectometric interferometry to measure dynamic strain in a network of single mode optical fibre sensors. The sensor is constructed on unbalanced fibre optic Michelson's interferometer. In the paper digital demodulation with application of fiber optic coupler 3x3 is also presented.