22 October 2004 Full vector modal analysis of microstructured optical fiber propagation characteristics
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Abstract
Microstructured optical fibers (MOFs) are optical fibers having a periodic air-silica cross-section. The air holes extend along the axis of the fiber for its entire length. The core of the fiber is formed by a missing hole in the periodic structure. Remarkable properties of MOFs have recently been reported. This paper presents new work in the modeling of the propagation characteristics of MOFs using the Finite Element Method (FEM) and the Galerkin Method (GM). This efficient electromagnetic simulation package provides a vectorial description of the electromagnetic fields and of the associated effective index. This information includes accurate determination of the spectral extent of the modes, cutoff properties and mode-field distributions. We show that FEM is well adapted for describing the fields at abrupt transitions of the refractive index while GM has the advantage to accurately analyze MOFs of significant complexity using only modest computational resources. This presentation will focus on the specific techniques required to determine single mode operation, dispersion properties and effective area through careful choice of the geometrical parameters of the fibers. We demonstrate that with suitable geometrical parameters, the zero dispersion wavelength can be shifted. This tool can also provide design criteria for fabricating MOFs and a corresponding map of effective area. This approach is validated by comparison with experimental results and measurements on actual MOFs fabricated at IRCOM and at Alcatel Research and Innovation Center.
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Mourad Zghal, Mourad Zghal, Faouzi Bahloul, Faouzi Bahloul, Rihab Chatta, Rihab Chatta, Rabah Attia, Rabah Attia, Dominique Pagnoux, Dominique Pagnoux, Philippe Roy, Philippe Roy, Gilles Melin, Gilles Melin, Laurent Gasca, Laurent Gasca, } "Full vector modal analysis of microstructured optical fiber propagation characteristics", Proc. SPIE 5524, Novel Optical Systems Design and Optimization VII, (22 October 2004); doi: 10.1117/12.558999; https://doi.org/10.1117/12.558999
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