Bài báo khoa học

In this paper, we demonstrated the ability of a hexagonal photonic crystal ¯ber (PCF) with a hollow core in¯ltrated with nitrobenzene (C6H5NO2) to generate a broad SC spectrum at low peak powers. Due to the non-uniformity of the air hole diameters, our new design allows for simultaneous optimization of features, resulting in near-°at, near-zero dispersion, a small effective mode area, and low attenuation for e±cient spectral broadening. We selected two optimal structures from the simulation results to analyze the nonlinear properties and supercontinuum generation. The ¯rst ¯ber, #HF1, with a lattice constant of 1.0
m and a ¯lling factor of 0.45, operates in all-normal dispersion and produces spectral SC ranging from 0.81
m to 1.919
m with a pump wavelength of 1.56
m, a pulse duration of 90 fs, and peak power of 0.133kW propagated in a 1 cm ¯ber length. The #HF2 ¯ber (lattice constant of 2.0
m, ¯lling factor of 0.3) has an extended SC spectrum from 0.792
m to 3.994
m, a pump wavelength of 1.55
m, a pulse width of 110 fs, a peak power of 0.273kW propagated in a 15 cm ¯ber length. The proposed ¯ber may be a new-generation optical ¯ber suitable for low-peak power all-¯ber optical systems to replace glass-core glass ¯ber