Light behaviour in polymer optical fibre bend - A new analysis method

Abstract

The paper presents light behaviour in polymer optical fibre bend, especially power transmission and near field power pattern in the fibre core. The characteristic parameters of polymer optical fibre (POF) are large core diameter and large numerical aperture. This fibre can be bent in small radius of curvature that is comparable with a fibre core radius. This way, the geometrical properties of polymer optical fibre bending geometry should not be omitted in power transmission calculations as is known for single-mode fibres. The analysis presented in this work has been done by nonlinear ray tracing technique. The novelty of this method implementation is the use of Bezier's curve for exact description of the bend and skew rays propagation analysis. The results obtained indicate that when the convergence conditions of method are met, theoretical results are in accordance with the experiment data.