Quasi-distributed white light fiber optic strain sensor

Abstract Development and characteristics of a quasi-distributed intrinsic fiber optic strain sensor based on white light interferometry is described. The research presented here describes the development of a new optical fiber sensor system for measurement of structural strains based on white light interferometry. Individual segments of single mode optical fibers are linked in series and a scanning white light interferometer provides for distributed sensing of strain signals from various locations in the structure. The system can be configured for automatic compensation of drift due to environmental effects, i.e. temperature. The experimental results demonstrate the linearity of the system and the capability for distributed sensing of strains.