Open AccessDispersion and nonlinearity properties of small solid-core photonic fibers with As2Se3 substrate
Author(s) -
Thi Thuy Nguyen,
Trong Duc Hoang,
Tran Bao Tran Le,
Van Trong Dang,
Van Lanh Chu
Publication year - 2022
Publication title -
tạp chí khoa học đại học huế: khoa học tự nhiên/tạp chí khoa học đại học huế: khoa học tự nhiên (online)
Language(s) - English
Resource type - Journals
eISSN - 2615-9678
pISSN - 1859-1388
DOI - 10.26459/hueunijns.v130i1d.6397
Subject(s) - materials science , photonic crystal fiber , supercontinuum , modal dispersion , optics , zero dispersion wavelength , dispersion (optics) , wavelength , photonic crystal , lattice constant , refractive index , optoelectronics , fiber , dispersion shifted fiber , physics , composite material , diffraction , fiber optic sensor
Characteristics of As2Se3 photonic crystal fibers (PCFs) with a solid-core and small-core diameter are numerically investigated in the long-wavelength range (from 2 to 10 μm). A full modal analysis and optical properties of designed photonic crystal fibers with lattice constant Λ and filling factor d/Λ are presented in terms of chromatic dispersion, effective refractive index, nonlinear coefficients, and confinement loss. The simulation results show that a high nonlinear coefficient of 4410.303 W–1·km–1 and a low confinement loss of 10−20 dB·km–1 can simultaneously be achieved in the proposed PCFs at a 4.5 μm wavelength. Chromatic dispersions are at. The values of dispersion increase with increasing filling factor d/Λ and decrease with the increase in lattice constant Λ. In particular, some chromatic dispersion curves also cut the zero-dispersion line at two points. The flat dispersion feature, high nonlinearity, and small confinement loss of the proposed photonic crystal fiber structure make it suitable for supercontinuum.