Dispersion and nonlinearity properties of small solid-core photonic fibers with As2Se3 substrate

Hue University Journal of Science: Natural Science - Tập 130 Số 1D - Trang 55-64 - 2021
Thi Thuy Nguyen1, Trong Duc Hoang1, Tran Bao Tran Le2, Van Trong Dang2, Van Lanh Chu2
1University of Education, Hue University, 34 Le Loi St., Hue, Vietnam
2Department of Physics, Vinh University, 182 Le Duan St., Vinh City, Vietnam

Tóm tắt

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 flat. 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.

Từ khóa

#Keywords: Small solid core photonic crystal fibers #chromatic dispersion #effective refractive index #confinement loss #nonlinear coefficient and nonlinear properties

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Hue University Journal of Science: Natural Science

Tập 130 Số 1D

55-64

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