Dispersion Compensating Photonic Crystal Fiber with Enhanced Properties Achieved by Modified Core Geometry

S Kraus ,Michal Lucki

doi:10.15598/aeee.v10i2.630

Abstract

A novel dispersion compensating fiber based on photonic crystal fiber has been designed and studied in terms of optimal dispersion and operating bandwidth. The investigation of dispersion characteristics with respect to change in hole diameter and pitch has been provided. Further optimization of the designed fiber has been applied to the achieved fiber’s properties in order to achieve a potentially easy-to-fabricate dispersion compensating fiber.

Highlights

Optical pulses propagating in an optical fiber are distorted owing to wavelength-dependent variation in propagation time of individual components of the optical pulse
A mature dispersion compensating Photonic Crystal Fibers (PCFs) is characterized by high value of dispersion coefficient to allow for efficient compensation of Chromatic Dispersion (CD) in optical fibers, whilst keeping its length reduced to the minimum
A simple design of a Dispersion Compensating Fibers (DCFs), based on Index Guiding Photonic Crystal Fiber (IGPCF), with a hexagonal lattice and solid core modified by insertion of a small hole into it is considered in [8]

Summary

Introduction

Optical pulses propagating in an optical fiber are distorted owing to wavelength-dependent variation in propagation time of individual components of the optical pulse. This leads to pulse broadening and interference between subsequent pulses, which decrease the system performance. Material dispersion, which is positive for silica glass at telecom wavelengths, is related to material properties, fiber length and the width of spectrum of an optical source. Waveguide dispersion depends on the geometry of fiber, accuracy of fabrication and is influenced by the field distribution of the guided mode. The design flexibility of Photonic Crystal Fibers (PCFs) for engineered dispersion is inherited in their strong correlation between design parameters and optical

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