Proposal of Highly Birefringent Porous Core Photonic Crystal Fibre for Polarisation Maintaining Terahertz Wave Guidance

A highly birefringent photonic crystal fibre with elliptical air holes in the core has been proposed and simulated for terahertz wave propagation. Using finite element method with anti-reflective perfectly matched layer, it is shown that the three elliptical air holes in the core are sufficient to produce extremely high birefringence, high power fraction and low transmission losses.