Abstract

Attention is directed to the bending-loss properties of a triangular-index fiber with a depressed cladding ring, which can be advantageously used to obtain either a dispersion-shifted or a dispersion-flattened feature. Both cases are studied to search for the set of ring parameters that yield the lowest bending loss while ensuring a low dispersion. Near-optimal designs are proposed and compared with other well-known dispersion-shifted and dispersion-flattened fiber designs. The numerical methods used in our computations are the vector-mode power-series expansion method for fields and dispersion calculations and the volume-current method for bending-loss predictions.

© 1994 Optical Society of America

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