Ultra-high negative dispersion compensating modified square shape photonic crystal fiber for optical broadband communication

In this work, a modified square photonic crystal fiber (MS-PCF) architecture is exposed with ultra-high negative dispersion for communication window. The validation of the model is successfully performed by applying an efficient full-vector finite element method (FV-FEM) with anisotropic perfectly matched layers (PMLs) for precise simulation of PCFs. Additionally, waveguide dispersion engineering is accomplished by tuning the structural parameters of the MS-PCF. From the numerical investigation, negative dispersion behavior permits remarkable suppression rather than positive dispersion. It offers the high negative dispersion of -2357.54 ps/nm/km and Kerr nonlinearity (gamma) of 74.68 W-1 km(-1) simultaneously at the operating wavelength, lambda = 1550 nm. Nevertheless, the designed fiber ensures the mono mode operation in the entire band of interest from lambda = 1340 nm to lambda = 1580 nm. MS-PCF with these outstanding optical performances has distinguished potency to be practiced as a dispersion compensating fiber in optical communication systems. (C) 2021 THE AUTHORS. Published by Elsevier BV on behalf of Faculty of Engineering, Alexandria University.

Automated summary

This study presents a modified square photonic crystal fiber (MS-PCF) architecture with ultra-high negative dispersion, validated using an efficient numerical method with precise simulation of PCFs. Waveguide dispersion engineering is achieved through adjusting the structural parameters of the MS-PCF, showcasing significant suppression of negative dispersion behavior. The high negative dispersion and Kerr nonlinearity offered by the MS-PCF make it a potential candidate as a dispersion compensating fiber in optical communication systems.