Large negative dispersion in photonic crystal fiber by applying gold nanoparticles in square cladding

In this paper, a new structure of photonic crystal fibers (PCFs) with large negative dispersion is presented in order to compensate the positive at wavelength 1.55 μm. The proposed PCF has square lattice structure. basic cladding, it consists four rings, so that each ring number circular holes. final structure, two inner rings cladding are reshaped relative outer rings. first near core stellar shaped holes gold nanoparticles its center, and second smaller diameter than base material fiber silica. use cores causes amount dispersion, which compensates dispersion. Simulation results show minimum − 4593 ps/(nm.km) μm bring significant improvement compared other similar references.