Polarization maintaining highly birefringent small mode area photonic crystal fiber at telecommunication window

in this paper a highly polarization maintaining birefringent photonic crystal fiber at telecommunication window is reported via full-vectorial finite element method (fv-fem). by taking triangular lattice of three ring hexagonal structure pcf with suitable designing parameters such as symmetrical elliptical hole along radial axis of ellipticity a/b=5μm, air hole diameter d=1μm and pitch λ=2.3μm, high birefringence (2.437×10-3) with small effective mode area(9.47μm2) and beat length (0.64cm) are found at wavelength 1.55μm.