High birefringence and nonlinearity photonic crystal fiber

In this work, a new type of photonic crystal fiber is designed, which is used tellurite glass as the background material. The finite element method is implemented to study its features, for instance, dispersion, birefringence, and nonlinearity. Simulation results indicate that our designed photonic crystal fiber could obtain a higher birefringence of 3.79 × 10−2 and exhibit a maximum nonlinear coefficient of 1672.36 W−1 km−1 at 1.55 μm. About 2000 nm wide supercontinuum can be generated at the pumping wavelength of 1550 nm. The proposed photonic crystal fiber features may be utilized for optical fiber sensing, dispersion compensation, supercontinuum generation, and other fields.