Abstract
In this paper a comparison is performed among different types of solid core photonic crystal fibers (PCFs) whose structural shape is hexagonal, octagonal and decagonal having five rings of air holes for each structure. Various key characteristics of PCF chosen for an efficient analysis are confinement loss, effective area, chromatic dispersion and nonlinear coefficient. Finite element method (FEM) is used for simulating PCFs structure by Comsol Multiphysics 5.0 software tools. For each structure background material is silica, ratio of diameter of the air hole (d h ) and pitch constant (A) is d h /Δ=0.5. According to numerically simulated results, it is revealed that at 1.55 µm wavelength, hexagonal PCF has low dispersion value which is -37.4 ps/(km.nm). Decagonal PCF offers low value of confinement loss as well as effective area which are 3.21×10-10dB/m and 3.126 µm2respectively at 1.55 µm wavelength. Nonlinear coefficient of decagonal PCF is low compared to decagonal. Optical properties of octagonal PCF are intermediate between hexagonal and decagonal PCF. Hexagonal PCF is appropriate for applications like dispersion compensation fiber and decagonal PCF is suitable for supercontinuum generation.
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