A note on ultra-short pulses compression in silicon optical waveguides under fourth-order dispersion

Mandeng, Lucien Mandeng; Ibraid, S. Fewo; Tchawoua, Clément; Kofané, Timoléon Crépin

doi:10.1117/12.2063573

Cited by 3 publications

(1 citation statement)

References 20 publications

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“…(iii) What about its coherence properties ?. It should be noted that the characteristics of the Airy pulses have already been studied in the context of SOI waveguides [22][23][24]60,61] but not in the context of the SCG (except for other kinds of waveguides [7,10,11]) and even more in the consideration of the terms of multiphoton absorption with the terms NFK and THG.…”

Section: Introductionmentioning

confidence: 99%

Truncated Airy pulses supercontinuum generation in a silicon-on-insulator optical waveguide including third-harmonic generation and negative-frequency Kerr terms

Souang¹,

Mandeng²,

HEUTEU³

et al. 2023

Preprint

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We report in this work the numerical study of the supercontinuum generation (SCG) phenomenon raised from femtosecond truncated Airy pulses within a silicon-on-insulator (SOI) waveguide including loss effects, third-harmonic generation (THG) and negative-frequency Kerr (NFK) terms. This study is conducted through a modeling based on the full unidirectional pulse propagation equation (UPPE) model which allows to assume the existence of the NFK term in the Kerr nonlinearity with a spectral filtering. The various effects of the linear loss (LL), the free-carrier absorption (FCA)/ free-carrier dispersion (FCD), the two-photon absorption (TPA), the THG, the NFK, the peak power, the pulse duration and the pulse shape are explored and discussed. For the shape comparison, we use a symmetrical profile of the sech-type pulse. More specifically, we show that the Airy pulse has SCG spectra that are less influenced by the waveguide than the sech-type symmetric pulse; moreover, the losses effectively reduce the spectral intensity (S.I) and the spectral bandwidth (S.B) of the spectra while the THG and the NFK increase them. However, the most deleterious factor for the Airy pulse is the LL, while that of the sech-type pulse is the TPA. The SCG spectra of the Airy pulse are broader and more coherent than that of the sech-type in the studied waveguide. Due to the presence of linear and nonlinear loss terms, the increase in signal energy is deleterious to the SCG in this silicon waveguide; this results in smaller spectra as peak power and pulse duration increase.

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Section: Introductionmentioning

confidence: 99%

Truncated Airy pulses supercontinuum generation in a silicon-on-insulator optical waveguide including third-harmonic generation and negative-frequency Kerr terms

Souang¹,

Mandeng²,

HEUTEU³

et al. 2023

Preprint

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Dynamics of vortex and anti-vortex solitons in a vectorial cubic-quintic complex Ginzburg-Landau equation

Nko’o Nko’o,

Djazet,

Mandeng

et al. 2024

Phys. Scr.

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In this paper, we present a study of vortex and anti-vortex dynamics within a complex cubic-quintic Ginzburg-Landau vector equation (CCQGLVE). We employ a variational approach to address the analytical aspects, and the results obtained are subsequently confirmed numerically. The vortex vector (VV) and the anti-vortex vector (anti-VV) are defined with topological charges: m = 1 for VV and m = − 1 for anti-VV. Our investigation reveals that the stability zone map corresponds to the region where greater stability can be achieved for the two studied solutions. Notably, the radius of the vortex craters experiences variations either an increase or decrease depending on the competition between the coupling parameters associated with cubic and quintic cross-phase modulation (XPM). During the propagation, the interaction between a fundamental soliton and anti-VV transforms the soliton into a vortex after a short time, but both finally undergo self-confinement which probably will generates solitons. In the case of the interaction between a VV and a fundamental soliton, we observed a self-confinement and a transformation into solitons. Considering the interaction between a VV and an anti-VV, we found that both solutions are also self-confined but the anti-VV solution turns into a soliton faster than the VV solution. This confirms that the anti-VV is the better solution that can be managed with system coupling parameters than the VV one.

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Supercontinuum generation of Airy pulses in a silicon-on-insulator optical waveguide including third-harmonic generation and negative-frequency Kerr terms

Boukar,

Mandeng Mandeng,

Heuteu

et al. 2024

Eur. Phys. J. D

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A note on ultra-short pulses compression in silicon optical waveguides under fourth-order dispersion

Cited by 3 publications

References 20 publications

Truncated Airy pulses supercontinuum generation in a silicon-on-insulator optical waveguide including third-harmonic generation and negative-frequency Kerr terms

Truncated Airy pulses supercontinuum generation in a silicon-on-insulator optical waveguide including third-harmonic generation and negative-frequency Kerr terms

Dynamics of vortex and anti-vortex solitons in a vectorial cubic-quintic complex Ginzburg-Landau equation

Supercontinuum generation of Airy pulses in a silicon-on-insulator optical waveguide including third-harmonic generation and negative-frequency Kerr terms

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