Effect of Wafer Dimension on the Dispersion and other Polarizing Properties of PCF

In this paper we propose some index guided Photonic Crystal Fiber (PCF) with elliptical holes. The design has been proposed such that it shows a decrease in the value of ratio of the area of elliptical air holes to that of the wafer dimension. The effect of variation in wafer dimension of a constant lattice size is analyzed for observing the unique properties of PCF like dispersion, birefringence, confinement loss and other polarizing properties. The simulation of the proposed structures has been carried out using OptiFDTD simulator with Full vector mode solver using FDTD method. The dispersion reported is almost zero at a wavelength of 0.3 m  for some of the structures proposed. It is observed that all the structures proposed has shown the most negative dispersion in between the wavelength range of 0.35 0.4 m m    . The birefringence reported is of the order of 3 10 . However the confinement loss reported is low and of the order of 5 10 . Besides zero confinement loss is observed at a wavelength of 0.25 m  and at 0.9 m  for the structure proposed in configuration V and configuration I. Key Words—Photonic crystal fiber (PCF), Total international reflection (TIR), Birefringence, Finite Difference Time Domain (FDTD), Transparent Boundary Condition (TBC), Confinement Loss, Vnumber, Normalized Wavelength.