Abstract

A mathematical expression is derived for the shape of multiple-beam Fizeau fringes crossing a graded-index optical fiber inserted in a silvered liquid wedge. Formulas are obtained for calculating both α and Δn from fringe shifts. A formula is deduced for step-index fiber. Experimental results have been obtained from microinterferograms.

© 1985 Optical Society of America

Multiple-beam interference fringes applied to GRIN optical waveguides to examine fiber formation

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Multiple-beam interferometric determination of Poisson’s ratio and strain distribution profiles along the cross section of bent single-mode optical fibers

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Index profile of multilayer fibers of an elliptical cross-section

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