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Opt Lett. 2001 Apr 15;26(8):488-90.

Symmetry and degeneracy in microstructured optical fibers.

Abstract

The symmetry of an optical waveguide determines its modal degeneracies. A fiber with rotational symmetry of order higher than 2 has modes that either are nondegenerate and support the complete fiber symmetry or are twofold degenerate pairs of lower symmetry. The latter case applies to the fundamental modes of perfect microstructured optical fibers, guaranteeing that such fibers are not birefringent. We explore two numerical methods and demonstrate their agreement with these symmetry constraints.

PMID:
18040361
DOI:
10.1364/ol.26.000488

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