Design and Analysis of Optical Parameters of Hybrid Solid Core PCF

Abstract

In this paper, a solid hybrid PCF with non-uniform size air holes is presented at the cladding area. The innermost cladding area is star shape of circular air holes, and the outer four layers are taken 2.8 µm for numerical analysis. Then the size of the outer four layers is taken to 2.5 µm, 2.2 µm, 2 µm and 1.7 µm for various parameter investigations. The proposed structure has a slight confinement loss with high nonlinearity. By varying the size of the outer four-layer up to 1.7 µm, slight confinement loss with high non-linearity and flattened zero dispersion is obtained. Negative dispersion is obtained for 2 µm air holes for the outer four layers with shallow confinement Loss. For air-fill fraction 0.566 at 1.5 µm, the confinement loss is 2.93×10^-7 db/km; nonlinear coefficient is 14.72 w-1km. At 0.666 air-fill fraction, the confinement loss is 38.289×10^-6 with nonlinear coefficient loss 28.60 w-1km and highly negative dispersion. Background material is silica taken here. V parameter is less than 2.405, which confirms single modality. Proposed structure has flat zero-dispersion with slight confinement loss which is extremely applicable for laser devices, zero dispersive fiber, telecommunication and WDM.

Keywords: solid hybrid PCF; dispersion; confinement loss; nonlinear coefficient; effective area