Interferometric determination of optical properties of fibres with irregular transverse sections and having a skin-core structure

Abstract
Multiple-beam Fizeau fringes in transmission and at reflection were used to investigate the optical properties of layers of fibres with irregular transverse sections having a skin-core structure. Mathematical expressions have been derived for the values of refractive indices and birefringence of these fibres. These expressions were applied to determine the optical properties of two samples of nylon-6 fibres.