Characteristics analysis of photonic crystal fiber with rhombus air-core

Aiming at the requirement of low confinement loss and multiple zero dispersion points in fiber-optic sensing systems and optical communication networks, a new type of photonic crystal fiber (PCF) with rhombus air-core is proposed. By using finite element method (FEM), the structural and optical properties of the proposed PCF are analyzed. Simulation results reveal that the proposed PCF has lower confinement loss with 10^?3 dB/m and higher birefringence. Besides, two zero dispersion points can be obtained after optimization. The proposed PCF may have important applications in fiber-optic sensing systems and other aspects.