In this paper, we report a numerical study of supercontinuum generation (SCG) using specially truncated Airy pulses in the mid-infrared (MIR) region of wavelengths through an AsSe2/As2S5 optical waveguide with rib-like structures modeled by the cubic-quintic nonlinear Schrödinger equation (CQNLSE). We use the waveguide studied by Diouf et al (2019 J. Lightwave Technol. 37 5692), which has been found interesting, as it can generate explosive spectra in the MIR domain. Through the anomalous dispersion regime, the spectral 20 dB bandwidths obtained have been found to exceed approximately 97250 nm. We also consider the effects on SCG spectra of quintic Kerr nonlinearity (QKN) and nonlinear photon absorptions (NPAs) such as two-photon absorption (TPA) and three-photon absorption (3PA). Without the NPAs, only the cooperative QKN is beneficial for the MIR-SCG. In the temporal domain, the emission of dispersive waves (DWs) is avoided by the presence of NPAs, while the cooperative nonlinearities perform this emission. Furthermore, if, in the cooperative case, we always neglect the 3PA and consider the TPA, we find an interesting spectral intensity (SI) of the SCG, compared with the case of competition between nonlinearities. Surprisingly, the 3PA appears to be a good tool for controlling the TPA because the SI is less reduced when the QKN cooperates with the cubic Kerr nonlinearity (CKN). In particular, if we consider the case of competition, the 3PA enhances the SI compared to the single TPA case (in which the 3PA is neglected) for larger wavelengths.

In this paper, we introduce another technique of Airy pulse regeneration in fiber links using the interaction between group velocity dispersion (GVD) and the initial value of frequency chirp. This technique of regeneration consists of managing the product of G V D × c h i r p over each piece f i = 1 … N of fiber line having N pieces in the case of zero-third-order dispersion (TOD) systems. This work follows [Phys. Rev. A 89, 043817 (2014)PLRAAN1050-294710.1103/PhysRevA.89.043817], which studied the nonzero-TOD system. Three models are considered: the first consists of alternation of the GVD with the chirp being constant, the second consists of alternation of the chirp with a constant GVD, and the third consists of the alternation of both parameters. Through the numerical results obtained in the linear optical system, we show that the first model with an initial condition corresponding to the asymmetric inversion (A.I.) mechanism, G V D × c h i r p <2021