Symmetry and degeneracy in microstructured optical fibers

M. J. Steel*, T. P. White, C. Martijn De Sterke, R. C. McPhedran, L. C. Botten

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

286 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)488-490
Number of pages3
JournalOptics Letters
Issue number8
Publication statusPublished - 15 Apr 2001
Externally publishedYes


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