Design on a wideband ultra-high birefringence, low dispersion and high nonlinearity photonic crystal fiber with near hyperbolic structure

We propose a novel near hyperbolic photonic crystal fiber (PCF). By employing the finite element method, properties of this structure, including the birefringence, dispersion and nonlinearity are investigated. Numerical results show that ultra-high birefringence reaches 5.42 x 10(-2), total dispersion reaches -621.384 Ps / nm / km and nonlinear coefficient reaches 100.5 W-1 center dot km(-1) at 1.55 mu m by optimizing structural parameters. Furthermore, birefringence still can reach 10(-2) at 0.6 mu m. It can be used potentially as multiple FWM, dispersion compensation, wideband supercontinuum generation, tunable wavelength converters, and ultrashort soliton pulse transmission.