title: Improved air-silica photonic crystal with a triangular airhole arrangement for hollow-core photonic bandgap fiber design.
abstract: We propose an improved photonic crystal (PC) cladding design for existing air-guiding photonic bandgap (PBG) fibers whose cladding airholes are arranged in a triangular lattice pattern. By increasing the sizes of concentrated silica regions in the cladding PC, we can have a larger degree of freedom in controlling the cladding bandgap regions. We predict that a fiber made from this type of cladding would perform better in terms of the PBG-guiding wavelength range, radiation loss owing to finite cladding size, and the ability to avoid surface mode problems.
authors.affiliation: Netwvork Technology Research Centre, Nanyang Technological University, 50 Nanyang Drive, Singapore 637553. yanmin@pmail.ntu.edu.sg
authors.forename: M
authors.initials: M
authors.lastname: Yan
authors.forename: P
authors.initials: P
authors.lastname: Shum