Open AccessFresnel Fibres with Omnidirectional Zone Cross-sections
Author(s) -
Cícero Martelli,
John Canning
Publication year - 2007
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.15.004281
Subject(s) - optics , zone plate , fresnel zone , fresnel equations , omnidirectional antenna , fresnel diffraction , materials science , fresnel number , diffraction , physics , refractive index , telecommunications , computer science , antenna (radio)
Fresnel fibres with silica zones resembling omnidirectional structures with self-imaging properties are proposed. Numerical simulation is carried out on a large air hole Fresnel fibre with a triadic Cantor fractal zone cross-section (FZC). The results show the transmission bandgap of these fibres widens and the practical confinement loss decreases with increasing orders of self-imaging. For an order of S = 4 a bandwidth Deltalambda= 0.69 mum and a confinement loss of 0.11 dB/km @ 1.1 mum is calculated.