Defected core hybrid cladding photonic crystal fiber with high birefringence & highly negative dispersion properties

Abstract

This paper presents a Defected Core Hybrid Cladding photonic crystal fiber with extremely high birefringence and highly negative dispersion properties at telecommunication window. This photonic crystal fiber (PCF) with a defected core having intentionally introduced walls of elliptical air holes is analyzed with full-vectorial finite element method(FEM).The proposed structure exhibits an extremely high birefringence (4.39×10-2) at operating wavelength 1550nm which is the highest to date and is particularly useful for the generation of a polarization stable supercontinuum (SC). The proposed PCF also exhibits the properties of a dispersion flattened fiber for only one polarization and large negative dispersion for the other which leads to a single polarization SC. The highly negative dispersion found is -662.2 ps/nm/km at operating wavelength 1550nm which is useful for dispersion compensating fiber.

Design of an Ultrahigh Birefringence Photonic Crystal Fiber with Large Nonlinearity Using All Circular Air Holes for a Fiber-Optic Transmission System

“…Different types of PCF structures were suggested in order to overcome the weak confinement of light in the fiber core. For example, Shawkat et al proposed a PCF with a defected core and hybrid cladding to get a birefringence of 4.39 × 10 −2 [19]. Chen et al reported high birefringence of 1.5 × 10 −2 by arranging a core of elliptical air holes and a cladding of circular air holes in a hexagonal lattice [10].…”