Design and analysis of novel octagonal photonic crystal fiber with F-doped elliptical hole core

A design of octagonal photonic crystal fiber (OPCF) with F-doped elliptical hole core is proposed. The proposed design is simulated through an full vector finite element method (FVFEM) and anisotropic perfectly matched layers (APML). Numerical results show that the designed OPCF has the ultra-flattened dispersion of 0 ± 0.4 ps/(nm km) from 1.34 μm to 1.72 μm (380 nm band) which covers S, C and L communication bands, a low confinement loss of less than 10−7 dB/m in the same wavelength range, and the corresponding birefringence and nonlinear coefficient are about 2.12 × 10−2 and 50.67 W−1 km−1 at 1.55 μm, respectively. The proposed OPCF may have great potential applications in super-continuum (SC) generation, dispersion compensation, polarization maintaining and so on.