Abstract

We present a simple and precise method for the simultaneous measurement of the core diameter and the numerical aperture of step-index fibers. In contrast with conventional near-field and far-field methods proposed in the literature, this method is based on the measurement of the difference between the propagation constants of the modes LP₀₁ and LP₁₁ near the cutoff wavelength. We experimentally validate and highlight the high level of precision of this method with the characterization of commercial fiber samples.

© 2011 IEEE

High speed measurement of the core diameter of a step-index optical fiber

L. S. Watkins and R. E. Frazee
Appl. Opt. 19(22) 3756-3762 (1980)

High speed measurement of the core diameter of a step-index optical fiber: errata

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