Comparative study of large-solid-core photonic crystal fibers: Dispersion and effective mode area

In this study, large-solid-core photonic crystal fibers with fixed air-hole diameter d = 0.84 μm and with fixed pitch length Λ = 4.2 μm are investigated for different d/Λ ratios. The dispersions and the effective mode-areas are obtained and compared for both the structures. It is seen that the dispersion management is easier by using the fixed d structures, but for working around the same zero dispersion points in a large interval of d/Λ the fixed Λ structures are more available. The Aeff values larger than 100 μm2 are obtained with d/Λ smaller than 0.2 for both the two structures. Aeff increases rapidly with decreasing d/Λ to 0.1 and then reaches to Aeff value of 500 μm2 at the d/Λ = 0.1 for the fixed d structures. The single-mode regime for the two structures is also discussed.