A novel high-birefringence high nonlinear negative-dispersion crystal fiber with square mesh cladding

A novel photonic crystal fiber is proposed which is composed of a central defect core and a cladding with square mesh structure by introducing another air hole row between two air hole rows for every other line to a conventional rectangular lattice photonic crystal fiber. Its dispersion, birefringence, nonlinear and confinement loss are numerically investigated by full vector finite element method with anisotropic perfectly matched layers. And the novel PCF shows high birefringence high nonlinear negative dispersion effects which will be helpful to get admirable application in the field of polarization maintaining transmission system and dispersion compensation.