Multicorelike guidance in a triangular-core hollow optical fiber and spectral evolution of its eigenmode degeneracy

Sejin Lee, Woosung Ha, Jens Kobelke, Kay Schuster, Sonja Unger, Kyunghwan Oh

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7 Citations (Scopus)


A unique multicorelike guidance was achieved in a microstructured optical fiber composed of a circular air hole at the center surrounded by a high-index triangular core. Unique spectral evolution of the degeneracy was theoretically investigated using a vectorial finite element method to find a threefold degeneracy in both the fundamental and the first excited modes in the visible range, which evolved to twofold degeneracy as the wavelength increased to IR. Experimental measurements also confirmed evolution of the modal intensity from three spatially isolated patterns confined to individual corners into a supermode combining the three corners.

Original languageEnglish
Pages (from-to)4759-4761
Number of pages3
JournalOptics Letters
Issue number22
Publication statusPublished - 2012 Nov 15


All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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