Broadband Dispersion Compensating Highly Nonlinear Square Photonic Crystal Fiber: Design & Analysis

An optimal design of photonic crystal fiber (PCF) in square lattice architecture with circular air-holes of three different diameters is proposed for dispersion compensation in optical transmission system. Finite element method (FEM) with perfectly matched layer boundary condition is applied to investigate the guiding properties of the proposed PCF. Simulation results affirm that the proposed PCF offers large negative dispersion coefficient of -1212 ps/(nm.km) and high nonlinear coefficient of 117.4 W
^-1
Km
^-1
at 1.55μm wavelength. Moreover, the structural parameter variation around the optimum value due to fabrication complexity is evaluated and reported. The proposed PCF will be very suitable for high bit rate optical transmission networks, sensing and nonlinear applications.