Journals Proceedings

Abstract

In this paper a hybrid square–lattice PCF with circular and elliptical air holes are analyzed by the inclusion of small Ge-doped core, Si-doped core and Schott BK7 doped core at the center of a conventional photonic crystal fiber, and compared for their dispersion and birefringence properties. Numerical investigation shows high negative dispersion for Ge doped core by the increase in the ellipticity of air holes then Schott BK7 and it is lower than Si doped core PCFs and the modal birefringence for Si-doped core is very high as compared to other doped core PCF material. The proposed structure may be used in a wideband due to its flat and highly negative dispersion. A full-vector TE, FDTD method is used for analysis purpose.