Evaluation of strain sensing cables for Brillouin optical time domain analysis through Swept Wavelength Interferometry

Abstract

Swept Wavelength Interferometry (SWI) is used to experimentally validate two strain sensing optical fibre cable prototypes designed for Brillouin optical time domain analysis, alongside analytical and numerical modelling methods. The evaluation allowed to determinewhich cable design allowed for complete strain transfer. SWI also allows to accurately determine temperature compensation mechanisms for the second sensing fiber.