, Volume 7, Issue 2, pp 109-113

Measuring method for the refractive index profile of optical glass fibres

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Abstract

A new method for measuring the refractive index profile of optical glass fibres is described. This simply monitors the reflection of a focused laser beam from a polished fibre end face. Detailed tests on the accuracy and resolution of the method are described and the index profiles of several fibres are given as an example of its feasibility.