Abstract
An analytical theory of cylindrical low-contrast Bragg optical waveguides, i.e., Bragg fibers, was developed on the basis of the representation of thin diffuse layers by delta functions. A dispersion relation for the Bragg optical waveguide with a finite number of layers was derived in the scalar approximation. Mode fields and losses were numerically calculated for a fiber with parameters close to those of actual fiber known from the literature. A comparison with the planar model was performed, which showed significant qualitative similarity. The presented model of Bragg fibers is more realistic than the model with sharp layer boundaries.
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Additional information
Original Russian Text © R.M. Feshchenko, A.V. Vinogradov, 2008, published in Kratkie Soobshcheniya po Fizike, 2008, Vol. 35, No. 6, pp. 3–13.
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Feshchenko, R.M., Vinogradov, A.V. Modes of Bragg fiber with delta-function walls: Scalar approximation. Bull. Lebedev Phys. Inst. 35, 163–169 (2008). https://doi.org/10.3103/S1068335608060018
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DOI: https://doi.org/10.3103/S1068335608060018