Ultra-high birefringent, highly nonlinear Ge20Sb15Se65 chalcogenide glass photonic crystal fiber with zero dispersion wavelength for mid-infrared applications

A novel Ge20Sb15Se65 based photonic crystal fiber (PCF) with all circular air holes distributed in simple square lattice geometry is proposed which exhibits ultra-high birefringence and large nonlinearity. Different optical properties are investigated in mid infrared range by using finite element method (FEM). Simulation results show that by optimizing the cladding arrangement the proposed PCF offers high birefringence of 0.2978, large nonlinearity of 6585 W-1 km(-1). Moreover, zero dispersion can be obtained at 3.9 mu m for x mode and 4.95 mu m for y mode with nonlinearity of the order of 103 W-1 km(-1) which also can be tailored by adjusting the cladding air hole diameter. This proposed PCF can be utilized for mid infrared supercontinuum generation, fiber sensor, and spectroscopy systems.

Automated summary

A novel Ge20Sb15Se65 based photonic crystal fiber with ultra-high birefringence and large nonlinearity has been proposed, suitable for mid infrared supercontinuum generation, fiber sensor, and spectroscopy systems. By optimizing the cladding arrangement, high birefringence and large nonlinearity can be achieved, with zero dispersion points at specific wavelengths.