New proposal of chromatic dispersion control in honey comb photonic crystal fiber for broadband communication

This article presents a photonic crystal fibers (PCFs) that has a high-index core surrounded by air hole with Honey Comb structure and different air hole diameters surrounding core region. The proposed design module has been simulated through an efficient full vector modal solver based on the finite-difference method with anisotropic perfectly matched layers absorbing boundary condition. Through optimizing only three geometrical parameters, two air hole diameters, and pitch, the nearly zero ultra-flattened dispersion PCFs, as well as small effective area can be efficiently designed. We then analyze the sensitivity of the dispersion slope to small variations from the optimum value of specific structural parameters. The designed index-guiding Honey Comb-PCFs has a nearly zero ultra-flattened dispersion of 0±0.2 ps/(nm.km) in a wavelength range of 1.39 μm to 1.7 μm and effective mode area less than 34 μm² in all wavelength range resulting extremely small splice loss with conventional single mode fiber.