Small-core photonic crystal fibres with weakly disordered air-hole cladding

Niels Asger Mortensen, Martin Dybendal Nielsen, Jacob Riis Folkenberg, Kim Per Hansen, Jesper Lægsgaard

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Motivated by recent experimental work by Folkenberg et al (2003 Opt. Lett. 28 1882–4) we consider the effect of weak disorder in the air-hole lattice of small-core photonic crystal fibres. We find that the broken symmetry leads to higher-order modes which have generic intensity distributions resembling those found in standard fibres with elliptical cores. This explains why recently reported experimental higher-order mode profiles appear very different from those calculated numerically for ideal photonic crystal fibres with inversion and six-fold rotational symmetry. The splitting of the four higher-order modes into two groups fully correlates with the observation that these modes have different cut-offs.
Original languageEnglish
JournalJournal of Optics A
Volume6
Issue number2
Pages (from-to)221-223
ISSN2040-8978
Publication statusPublished - 2004

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