A Modified Design of a Hexagonal Circular Photonic Crystal Fiber with Large Negative Dispersion Properties and Ultrahigh Birefringence for Optical Broadband Communication

Shovasis Biswas,Md Hussain,Mohammad Islam,Zunayeed Zahir,Rishad Arfin,Syed Amir,Ashfia Habib

doi:10.3390/photonics6010019

Shovasis Biswas, Md Hussain + Show 5 more

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https://doi.org/10.3390/photonics6010019

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Journal: Photonics	Publication Date: Feb 25, 2019
Citations: 27	License type: CC BY 4.0

Affiliation: North South University, Independent University

Abstract

In this paper, we propose a modified design of a hexagonal circular photonic crystal fiber (HC-PCF) which obtains a large negative dispersion and ultrahigh birefringence simultaneously. The optical properties of the proposed HC-PCF were investigated using the finite element method (FEM) incorporated with a circular perfectly matched layer at the boundary. The simulation results showed large negative dispersion of −1044 ps/nm.km and ultrahigh birefringence of 4.321 × 10−2 at the operating wavelength of 1550 nm for the optimum geometrical parameters. Our proposed HC-PCF exhibited the desirable optical properties without non-circular air holes in the core and cladding region which facilitates the fabrication process. The large negative dispersion of the proposed microstructure over the wide spectral range, i.e., 1350 nm to 1600 nm, and high birefringence make it a suitable candidate for high-speed optical broadband communication and different sensing applications.

Highlights

Photonic crystal fiber (PCF) [1] is a new class of optical waveguide that guides the electromagnetic field by a periodic arrangement of dielectric medium that goes down the entire length of the fiber
We propose a modified design of hexagonal circular photonic crystal fiber (HC-PCF)
Characteristics and birefringence of we have studied the changes in the dispersion characteristics and birefringence of of the proposed structure for the variation in d

Summary

Introduction

Photonic crystal fiber (PCF) [1] is a new class of optical waveguide that guides the electromagnetic field by a periodic arrangement of dielectric medium that goes down the entire length of the fiber. A PCF microstructure involves lattice of air holes which appear on a background material, usually, silica. The confinement and propagation of the light takes place in the fiber core due to the existence of the periodic low-index air hole. The physical mechanism for which the light guidance takes place in the optical waveguide due to the difference in the refractive index is known as total internal reflection (TIR) or index guiding [2]. In recent years, have drawn significant attention as these microstructures exploit extraordinary optical properties which are unlikely to be achieved by the conventional optical fibers. Photonic fibers are being employed in many optical devices such as telecommunication sensors [3], polarization sensitive devices [4], wavelength de-multiplexer [5], sensors [6], filters [7], and splitters [8]

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