A Novel High Birefringence Single Elliptic Photonic Quasicrystal Fiber

This A novel single elliptical photonic quasi-crystal fiber (PQF) structure based on ZrF4-BaF2-LaF3-AlF3-NaF (ZBLAN) is proposed. There is a single elliptical air hole at the fiber core and a ten-fold Person-type quasi-crystal structure distributed in the outer layer. The birefringence and confinement loss (CL) of the PQF are numerically proposed in short-wavelength infrared region (SWIR) based on finite element method. The high birefringence is achieved thanks to a single ellipse near the fiber core breaking the symmetry of the structure. Fluoride materials ZBLAN have lower CL in SWIR than traditional quartz glass. The birefringence of this novel PQF can be maintained above 10-2, which will have great potential in optical devices.