Optical birefringence and polarization dependent loss of elliptical-hole rectangular lattice photonic crystal fibers based on polymer

We explore the polarization properties of elliptical-hole rectangular lattice photonic crystal fibers (PCFs) with elliptic fiber core based on polymer. The optical birefringence and polarization-dependent leakage loss are studied numerically based on the full-vector finite element method. Numerical results show that by using the proposed structure, a heightened modal birefringence of the order of 10^-2 has been obtained, and the leakage loss is reduced to 0.12 dB/m at wavelength of 0.65 μm when the PCF has 10 rings of elliptical air-holes. So this PCFs may be useful as high birefringence polarization-maintaining PCFs in practical applications.