Modal field deformation and transition losses in UV side-written optical fibers.

Abstract

The asymmetry of the UV-induced refractive-index profile in photosensitive optical fibers causes a deformation of the modal fields, resulting in transition losses between UV-exposed and unexposed fiber sections up to 0.1 dB for UV-induced index changes of the order of <or=10(-2). A numerical analysis of the transition losses is developed. It is verified… (More)

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