Designing Dispersion Flattened Photonic Crystal Fiber for Wideband Applications

In this paper, we proposed a dispersion flattened photonic crystal fiber (PCF) for having very low dispersion for wide bandwidth as well as low confinement loss. The proposed fiber has been numerically analyzed for Silica core as well as Borosilicate crown glass core with square lattice air holes. In the proposed design we have used elliptical air holes in the inner ring whereas outer rings are circular. Finite Element Method based software tool is used to analyze the proposed design. This comparison of core materials deduces that Borosilicate crown glass PCF produces negative dispersion, making it a good candidate to be used as Dispersion Compensating Fiber (DCF), whereas Silica PCF provides nearly zero dispersion at wavelength range 1.35 µm to 1.70 µm.