Niels Asger Mortensen et al 2004 J. Opt. A: Pure Appl. Opt. 6 221 doi:10.1088/1464-4258/6/2/011
Niels Asger Mortensen1, Martin D Nielsen1,2, Jacob Riis Folkenberg1, Kim P Hansen1,2 and Jesper Lægsgaard2
Show affiliationsMotivated 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.
42.70.Qs Photonic bandgap materials
Issue 2 (February 2004)
Received 29 August 2003, accepted for publication 26 November 2003
Published 5 December 2003
Niels Asger Mortensen et al 2004 J. Opt. A: Pure Appl. Opt. 6 221
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