Abstract
A spectral-domain white-light interferometric technique employing a low-resolutionspectrometer is used in measurement of the intermodal dispersion in optical fibres.The technique utilizes a tandem configuration of a compensated Michelsoninterferometer and a few-mode optical fibre and the resolving of so-calledequalization wavelengths at which the optical path difference (OPD) in theinterferometer is the same as the intermodal group OPDs. The intermodaldispersion in three different optical fibres was measured and the results fortwo of them were compared with the results of an adequate theoreticalanalysis using a model of a weakly guiding, step-index optical fibre.
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