Spatially Resolved Measurements of the Chromatic Dispersion in Fibers

Abstract

Technique for selective localization of four-photon mixing and its use for physical parameter extraction in fiber is described. The measurement method relies on localized counter-colliding power transfer and was applied to map dispersion and corresponding transverse geometry of different types of optical fibers. The technique is capable of resolving fiber core fluctuations comparable to a single silica molecular diameter.