BibSonomy publications for /user/div3/fiber_propertiesTue Aug 28 01:24:41 CEST 2007 Optics Express10 doi:10.1364/OPEX.13.007779207779-7793Loss in solid-core photonic crystal fibers due to interface roughness scattering132005rough_surfaces fiber_optics scattering fiber_properties div3 3The loss resulting from roughness scattering at hole interfaces within solid core photonic crystal fibers is theoretically analyzed and compared with measurements on fabricated fibers. It is found that a model roughness spectrum corresponding to frozen in capillary waves gives results in reasonably good agreement with experiments on small core fibers. In particular, the roughness scattering loss is shown to be only weakly dependent on wavelength. Agreement at a larger core size requires a long length-scale cut-off to be introduced to the roughness spectrum. Due to the long range nature of the roughness correlations, the scattering is non Rayleigh in character and cannot be interpreted in terms of a local photon density of states.Tue Aug 28 01:08:02 CEST 2007Optics Express9208277-8285Realizing low loss air core photonic crystal fibers by exploiting an antiresonant core surround132005fiber_design div3 fiber_properties fiber_fabrication Fiber_optics The modal properties of an air core photonic crystal fiber which incorporates an anti-resonant feature within the region that marks the transition between the air core and the crystal cladding are numerically calculated. The field intensity at the glass/air interfaces is shown to be reduced by a factor of approximately three compared to a fiber with more conventional core surround geometry. The reduced interface field intensity comes at the expense of an increased number of unwanted core interface modes within the band gap. When the interface field intensity is associated with modal propagation loss, the findings are in accord with recent measurements on fabricated fibers which incorporate a similar antiresonant feature.