Photonic crystal fibers with different structural parameter and different material have been investigated. Silica and Lead Silicate have been used as wafer. Two PCF structures with multi core and two structures with elliptical holes in the cladding region have been considered. Elliptical holes have area four times more than those circular air holes. Structures with multi core have reported higher birefringence and large non linear coefficient. All the PCFs structure shows anomalous dispersion behavior and offered very low confinement loss.