Accurate finite element modal solution of photonic crystal fibres

The imaginary distance full vectorial finite element based beam propagation method (IDVFEBPM) is applied to perform an accurate modal solution to photonic crystal fibres (PCFs). The robust perfectly matched layer (PML) boundary condition is employed at the edges of the computational window in order to account for the leakage property of the modes. The effects of the number of holes and the geometrical parameters of the PCF on the effective index, the confinement losses, the effective mode area and the dispersion of the fundamental mode have been thoroughly studied.