Abstract
Shane T. HuntingtonUniversity of MelbourneParticulate Fluids Processing CenterSchool of ChemistryParkville, Victoria 3010AustraliaAnn RobertsKeith A. NugentUniversity of MelbourneSchool of PhysicsParkville, Victoria 3010AustraliaSimon C. FlemingUniversity of SydneyAustralian Photonics Cooperative ResearchCenterOptical Fiber Technology Center101 National Innovation CenterAustralian Technology ParkEveleigh, New South Wales 1430AustraliaAbstract. The properties of a small-core high-numerical-aperture fiberare investigated using near-field scanning optical microscopy (NSOM).The microscopic structure of the fiber is also determined using a combi-nation of etching and atomic force microscopy (AFM).Although the modeprofile cannot be precisely predicted using AFM data alone, the mea-sured profile is in extremely good agreement with that calculated usingdimensional information provided by AFM and preform indexdata.
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