Numerical Investigation of Supercontinuum Generation Through AsSe2/As2S5 Chalcogenide Photonic Crystal Fibres and Rib Structures

Diouf, Mbaye; Mandeng, Lucien Mandeng; Tchawoua, Clément; Zghal, Mourad

doi:10.1109/jlt.2019.2934034

Cited by 16 publications

(23 citation statements)

References 42 publications

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“…[15,[18][19][20] On the other hand, waveguides provide integration, and hence, different types of waveguides have been considered for SCG, so far. [21][22][23][24] Recently, chalcogenide (ChG) glasses composed of the chalcogen (S, Se, and Te) and metalloid (Ge, As, Sb, and Ga) elements have attracted the attention of scientists in mid-infrared (Mid-IR) SCG [25][26][27] due to its appealing features such as lower two-photon absorption, high resilient to crystallization, higher Kerr coefficient (≈200 times higher than SiO 2 ), higher linear refractive index, and wide spectral transparency compared to fluoride, [28] tellurite, [29] and lead silicate. [30] SCG in the Mid-IR range, particularly in the range of 3 to 15 μm is highly desired due to its application in spectroscopy since the majority of molecules possess strong vibrational absorption in this spectral range.…”

Section: Doi: 101002/andp202100226mentioning

confidence: 99%

Super‐Continuum Generation in Graphene‐Based Chalcogenide Slot Waveguide

et al. 2021

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Slot waveguides comprised of Ge 23 Sb 7 S 70 and Si with and without graphene are considered for super-continuum generation in the mid-infrared range. The dispersion characteristics are optimized for the proposed waveguides comprised of Si and Ge 23 Sb 7 S 70 chalcogenide as the core and cladding, respectively with and without graphene sheets embedded in the proposed structure. The proposed waveguide without graphene possesses all-normal dispersion and the super-continuum spectra with bandwidth of 1.75 µm is obtained for a pump with wavelength of 2 µm, peak power of 100 W, and time duration of 50 fs, at 20 dB level. Also, the total length of the waveguide is 8 mm. The optimized structure with three graphene sheets presents flat anomalous dispersion and the super-continuum spectra with bandwidth of 3 µm is obtained for a pump with wavelength, peak power, and time duration of 3 µm, 7 mW, and 50 fs, respectively at 10 dB level. It is demonstrated that the proper dispersion region for super-continuum generation depends on the sign of Kerr-index of the nonlinear material. The proposed waveguides are highly compatible with fabrication technologies for mid infrared applications. IntroductionRecently, super-continuum generation (SCG) has attracted a great deal of interest in the design of broadband optical sources. [1] SCG originates from the interaction between diverse nonlinear and linear effects. The nonlinear effects include self-phase modulation (SPM), [2] cross-phase modulation, [3] soliton formation, [4] soliton fission (SF), stimulated Raman scattering, [5] four-wave mixing (FWM), [6,7] and the main linear characteristics are the dispersion and loss. SCG is applicable in optical coherence tomography, spectroscopy, high-precision frequency metrology, and pulse

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Section: Doi: 101002/andp202100226mentioning

confidence: 99%

Super‐Continuum Generation in Graphene‐Based Chalcogenide Slot Waveguide

et al. 2021

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“…Although the dispersive wave and other nonlinear effects can still support the continued broadening of the SC, the effect will not be obvious. Even with a further increase in the pump energy, the SC cannot continue to red-shift due to saturation [41,42]. Figure 12 shows the evolution of the SC spectrum with increasing pump power (P) from 10 kW to 50 kW.…”

Section: Supercontinuummentioning

confidence: 99%

“…When the femtosecond pulse width is wider, the soliton number N is larger and the fundamental soliton splits into N higher-order soliton pulses with different red-shifted central frequencies. The closer the split fundamental soliton approaches the second ZDW, the greater the effect of third-order dispersion [42]. At this time, the phase matching is easier to achieve, which enhances the FWM effect.…”

Section: Supercontinuummentioning

confidence: 99%

Arsenic Sulfide Suspended-core Fiber Simulation with Three Parabolic Air Holes for Supercontinuum Generation

Peng

Wang

2020

Photonics

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Highly nonlinear suspended-core fibers (SCFs) with tunable dispersion have attracted much attention in the fields of Raman amplification, optical frequency combs, broadband and flat supercontinuum generation (SCG). To address the limitation of applications due to its fragile suspension arms, this study proposes the design of a fiber structure with three parabolic air holes. Numerical simulations are performed to optimize an arsenic sulfide SCF in terms of dispersion management and SCG in the wavelength range from 0.6 µm to 11.6 µm. Results show that the proposed SCF has dual zero-dispersion wavelengths (ZDWs) that can be shifted by adjusting the parabolic coefficient of the air-hole and the equivalent diameter of the suspended core. By means of structural optimization, an SCF with 1 μm equivalent diameter and a parabolic coefficient of 0.18 μm−1 is proposed. The first ZDW of the SCF is blue-shifted to 1.541 μm, which makes it possible to use a commercial light source with a cheaper price, more mature technology and smaller volume as the pump source. SCG is studied by solving the generalized nonlinear Schrödinger equation using the split-step Fourier method, and a 0.6–5.0 μm supercontinuum spectrum is obtained at a pump source peak power of 40 kW.

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“…The drastic spectral broadening known as the supercontinuum generation (SCG) and obtained in highly nonlinear media from intense pulses through the combination of both linear and nonlinear processes, has been nowadays extensively investigated [1][2][3][4][5][6][7][8][9][10][11]. The particular attention on the SCG phenomenon has led to numerous applications in nonlinear optics such as biophotonics applications [1,3] (spectroscopy, microscopy, optical coherence tomography, diffuse optical spectroscopy and tomography...), optical frequency metrology [2], optical telecommunications applications [3] (multichannel telecommunication sources in wavelength-division multiplexing systems, pulse compressors...).…”

Section: Introductionmentioning

confidence: 99%

“…This technique encompasses managing the profile, the timewidth, the power or other parameters as the initial chirp [7,12]. In the SCG studies, the overwhelming majority of prior studies already cited above [1][2][3][4][5][6]8,9] utilized intense optical pulses with symmetric and compact temporal profiles such as Gaussian or sech-type pulses while the only ones that focused on Airy pulses are those of refs. [7,10,11,13].…”

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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Numerical Investigation of Supercontinuum Generation Through AsSe₂/As₂S₅ Chalcogenide Photonic Crystal Fibres and Rib Structures

Cited by 16 publications

References 42 publications

Super‐Continuum Generation in Graphene‐Based Chalcogenide Slot Waveguide

Super‐Continuum Generation in Graphene‐Based Chalcogenide Slot Waveguide

Arsenic Sulfide Suspended-core Fiber Simulation with Three Parabolic Air Holes for Supercontinuum Generation

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

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