6 March 2013 Equivalent step-index model of multifilament core fibers
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The accuracy of the recently presented1 equivalent step index approximation of multifilament core fibers is analyzed in terms of the effective refractive index, mode field area and bending losses of the fundamental mode. A modified Vparameter for this class of fibers as well as a single-mode condition is proposed. By comparison with a full-vectorial finite element method it is shown that the relative deviation of the effective refractive index and the mode field area are in the magnitude of 1 %. No significant decrease of bending losses is found for multifilament core fibers.
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Ron Spittel, Ron Spittel, Adrian Lorenz, Adrian Lorenz, Sylvia Jetschke, Sylvia Jetschke, Matthias Jäger, Matthias Jäger, Hartmut Bartelt, Hartmut Bartelt, "Equivalent step-index model of multifilament core fibers", Proc. SPIE 8627, Integrated Optics: Devices, Materials, and Technologies XVII, 862714 (6 March 2013); doi: 10.1117/12.2001879; https://doi.org/10.1117/12.2001879

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