Document Type : Original Article
Department of Physics, Aliabad Katoul Branch, Islamic Azad University, Aliabad Katoul, Iran
Photonic crystal fibers (PCFs) are widely used in optical industries and telecommunication systems as a low dispersion and structural losses with low nonlinear coefficient. Photonic crystals are media where their refractive index distribution function is periodic or non-periodic. A manifest property of photon crystals is the presence of a band-gap in the signal transmission spectrum. Electromagnetic detection with frequency range in the band range is not prohibited. Hence, the electromagnetic waves with a frequency range in the band-gap cannot be propagated. In this paper, the dispersion property of silica core photonic crystal fibers is analyzed for three and six-ring air hole structures. It is illustrated that the six-ring air hole structure shows satisfactory results in our design. Also, considering the holes filled with concentrated silica with fluorine materials, GeO2, P2O5, and B2O3 instead of air holes, it has been shown that the diffusion properties will have significant differences. The results obtained from simulations are shown by comparing with pure silica crystal.