flattened chromatic dispersion and low confinement losses. The proposed design has been
simulated based on the finite-difference method with anisotropic perfectly matched layers
absorbing boundary condition. It is proved that the design novel HN-PCFs is obtained a
nonlinear coefficient greater than 45W− 1km− 1 and low dispersion slope− 0.009 ps/(nm2.
km) at 1.55 μm wavelength. In addition, results from numerical simulation show that the ultra …