Study on Crosstalk-Free Polarization Splitter Based on Square Lattice Single-Polarization Photonic Crystal Fibers

摘要

We propose a novel L-shaped crosstalk-free polarization splitter (PS) based on square lattice single-polarization photonic crystal fibers, which has a wide bandwidth (250 nm) for single-polarization transmission. By employing a vectorial finiteelement method and finite-element beam propagation method, the numerical simulations demonstrate that an incident light polarized in any direction can be split into two orthogonal single-polarization states (xand y-polarizations) without any crosstalk through the proposed PS. Furthermore, a large structural tolerance and a wide transmission bandwidth are also demonstrated, which would lead to more easier fabrication process.