Abstract

The macro- and micro-bending performance of matched-cladding fibers was investigated experimentally by the pin-array test and the wire mesh test, respectively. In accordance with theoretical considerations it was demonstrated that the bending properties of step-index fibers cannot be completely described by the mode field diameter (MFD). In contradiction to general experiences in special cases a reduction of the bending losses with increasing MFD can be observed. It was stated that the MAC-value as the ratio of the mode field diameter and the cut-off wavelength is the best measure for the characterization of the bending sensitivity of step-index fibers.

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