Highly Nonlinear Dispersion Compensating Octagonal Photonic Crystal Fiber: Design and Analysis

Abstract

In this paper, we have presented an octagonal photonic crystal fiber (PCF) having five rings with circular air-holes of two different diameters which can yield high negative chromatic dispersion as well as high nonlinear coefficient. Finite element method has been employed to investigate the optical features of the designed PCF. The numerical investigation indicates that a large dispersion of −1449 ps/(nm.km) is obtained at $\pmb{\lambda=1.55\ \mu} \mathbf{m}$ which makes it suitable for compensating dispersion in optical communication networks. Moreover, the proposed PCF also offers high nonlinearity of $\pmb{100.5}\mathbf{W}^{\pmb{-1}}\mathbf{Km}^{\pmb{-1}}$ at $\pmb{1.55\mu}\mathbf{m}$ wavelength which makes it suitable for sensing application. Furthermore, structural parameter variation around appropriate value is investigated.