Photonic crystal fibres: mapping Maxwell's equations onto a SchrÃ¶dinger equation eigenvalue problem

N. A. Mortensen

doi:10.2971/jeos.2006.06009

Journal of the European Optical Society - Rapid publications, Vol 1 (2006)

Photonic crystal fibres: mapping Maxwell's equations onto a SchrÃ¶dinger equation eigenvalue problem

N. A. Mortensen

Abstract

We consider photonic crystal fibres (PCFs) made from arbitrary base materials and introduce a short-wavelength approximation which allows for a mapping of the Maxwell's equations onto a dimensionless eigenvalue equations which has the form of the SchrÃ¶ding equation in quantum mechanics. The mapping allows for an entire analytical solution of the dispersion problem which is in qualitative agreement with plane-wave simulations of the Maxwell's equations for large-mode area PCFs. We offer a new angle on the foundation of the endlessly single-mode property and show that PCFs are endlessly single mode for a normalized air-hole diameter smaller than ~042, independently of the base aterial. Finally, we show how the group-velocity dispersion relates simply to the geometry of the photonic crystal cladding.

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