A Photonic crystal fiber with large effective refractive index separation and low dispersion

A photonic crystal fiber (PCF) structure with a ring-core and 5 well-ordered semiellipse airholes has been creatively proposed. Through a comparison between the structures with a high refractive index (RI) ring-core and the structure without, it conclude that a PCF with a high RI ring-core can work better. Schott SF57 was elected as the substrate material of ring-core. This paper compares the effects of long-axis and short-axis changes on the PCF and selects the optimal solution. Especially TE0,1 mode's dispersion is maintained between 0 and 3 ps / (nm. km) ranging from 1.45 mu m to 1.65 mu m. This property can be used to generate a supercontinuum with 200 mu m long zero dispersion wavelength (ZDM). In addition, Delta n(eff) reaches up to 10(-3), which enables the near-degeneracy of the eigenmodes to be almost neglected. The proposed PCF structure will have great application value in the field of optical communications.