Confinement Loss and Nonlinearity Analysis of Air-Guiding Modified Honeycomb Photonic Bandgap Fibers

摘要

Air-guiding photonic bandgap fibers based on a modified honeycomb lattice have been numerically investigated through the finite element method. Results confirm that an extra hole in the unit cell of a honeycomb lattice can be exploited to enlarge the photonic bandgap, allowing air-guiding with confinement losses lower than 0.1 dB/km and nonlinear coefficient lower than 3.5 (centre dot) 10~(-3)(W (centre dot) km)~(-1) at 1.55 (mu)m.