Air-guiding has been demonstrated in a modified honeycomb photonic crystal fiber. The confinement losses and dispersion properties are numerically investigated by means of the finite element method (FEM). A guided mode with more than 98% of power propagating in air has been found over a wavelength range of about 200 nm. By means of a proper design, confinement losses lower than 0.1 dB/Km at λ = 1.55 μm can be obtained with ten cell rings and an air filling fraction of 74.4%.
Air-guiding photonic crystal fibers with modified honeycomb lattice / Selleri, S; Vincetti, Luca; Poli, F; Cucinotta, A; Foroni, M.. - STAMPA. - (2005), pp. 20-25. (Intervento presentato al convegno IEE/LEOS Workshop on Fibres ans Optical Passive Componets tenutosi a Palermo, Italy nel 22-24 giugno 2005) [10.1109/WFOPC.2005.1462094].