Optimization of highly nonlinear soft glass photonic crystal fiber with high birefringence

Abstract

This paper presents optimization of a highly nonlinear soft glass photonic crystal fiber (PCF) design with decagonal structure. In the core of PCF an elliptical air hole is designed to increase birefringence. Investigation of nonlinear coefficient of PCF design for various parameters is done using finite element method (FEM). Nonlinear coefficient of 282.83 W⁻¹km⁻¹ and 486.26 W⁻¹km⁻¹ for X and Y polarized mode respectively, and birefringence of 0.0289 is achieved at 1550 nm for the given structure. In addition to these two parameters, dispersion is found to be −507.695 ps/nm.km (X polarized mode) and −234.431 ps/nm.km (Y polarized mode) at 1550 nm.