Impulse dispersion in a multimode optical fiber from its far-field radiation pattern.
A simple geometric-optical theory predicts impulse broadening in multimode fibers using the far-field power distribution of an incoherently excited waveguide with arbitrary refractive-index profile. The accuracy is comparable with that of scalar optical methods if they do not incorporate mode coupling and a differential mode attenuation model.
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Universität (TH) Karlsruhe, Institut für Hochfrequenztechnik und Quantenelektronik, Postfach 6380, D-7500 Karlsruhe 1, Federal Republic of Germany.