Structure optimization of large-solid-core photonic crystal fibers based on Ge\(_{20}\)Sb\(_{5}\)Se\(_{75}\) for optical applications

Ngoc Vo Thi Minh; Danh Nguyen Thanh; An Nguyen Manh; Tham Tran Hong; Van Thuy Hoang; Lanh Chu Van; Van Hieu Le

doi:10.15625/0868-3166/18883

Author affiliations

Authors

Ngoc Vo Thi Minh Department of Physics, Vinh University, 182 Le Duan, Vinh City, Vietnam
Danh Nguyen Thanh A Sanh High School, Gia Lai Province, Viet Nam
An Nguyen Manh Faculty of Technology and Engineering, Hong Duc University, 565 Quang Trung Street, Thanh Hoa City, Vietnam
Tham Tran Hong Faculty of Natural Sciences, Hong Duc University, 565 Quang Trung Street, Thanh Hoa City, Vietnam https://orcid.org/0009-0004-7360-8778
Van Thuy Hoang Department of Physics, Vinh University, 182 Le Duan, Vinh City, Vietnam https://orcid.org/0000-0003-0056-2321
Lanh Chu Van Department of Physics, Vinh University, 182 Le Duan, Vinh City, Vietnam https://orcid.org/0000-0001-7738-6720
Hieu Van Le Faculty of Natural Sciences, Hong Duc University, 565 Quang Trung Street, Thanh Hoa City, Vietnam

DOI:

https://doi.org/10.15625/0868-3166/18883

Keywords:

Photonic crystal fiber (PCF), dispersion characteristics, square lattice, chalcogenide, Ge20Sb5Se75, effective mode area, confinement loss.

Abstract

This paper presents a new design of Ge₂₀Sb₅Se₇₅ large-solid-core photonic crystal fiber (PCF) with a 1st-ring-removed square lattice. Using the full vector finite element method for anisotropic perfectly matched layers, we numerically examine the dispersion characteristics of the PCF in the wavelength range spanning from 1.5 µm to 6.0 µm. The results reveal that photonic crystal fibers exhibit a variety of dispersion properties, including all-normal and anomalous dispersion, featuring one or two zero dispersion wavelengths (ZDWs). We propose two designs with optimal dispersion characteristics based on our numerical simulations. These designs have small lattice constants (Ʌ = 1.0 µm; Ʌ = 1.5 µm) and low fill factors (d/Ʌ = 0.3; d/Ʌ = 0.35). Furthermore, these selected fibers offer high nonlinearity and low confinement loss, making them excellent candidates for a wide range of optical applications.

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