Spectral compression in supercontinuum generation through the higher-order nonlinear Schrödinger equation with non-Kerr terms using subnanojoule femtosecond pulses

Mandeng, Lucien Mandeng; Mohamadou, Alidou; Tchawoua, Clément; Tagwo, Hippolyte

doi:10.1364/josab.30.002555

Cited by 14 publications

(11 citation statements)

References 8 publications

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“…The propagation of optical pulses through an SOI waveguide is governed by a generalized nonlinear Schrödinger equation that includes the effects of TPA and FCA, as in [15,[19][20][21][22][23]:…”

Section: Analysis Of the Modelmentioning

confidence: 99%

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Periodic compression of chirped femtosecond pulses in silicon waveguides under fourth-order dispersion

Mandeng

Fewo

Tchawoua

et al. 2014

J. Opt.

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We report the analysis of the compression mechanism for chirped femtosecond pulses in silicon-on-insulator waveguides under the effect of fourth-order dispersion (FOD) using the modified variational approach that involves Rayleighʼs dissipation function (RDF). Our results show that the nonlinear compression in these waveguides is input pulse dependent. Moreover, this study leads to a nearly periodic-like dynamic induced by the interplay between self-phase modulation and FOD in a normal group-velocity dispersion. In addition, when large values of the initial chirp and absorption coefficients present in these waveguides are considered, the compression mechanism is completely destroyed, with the observation of at least one pulse amplification over a short distance of propagation prior to pulse broadening.

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Section: Analysis Of the Modelmentioning

confidence: 99%

“…The crystalline nature of silicon causes the Raman effect to depend strongly on the waveguide geometry and mode polarization. On the other hand, the dynamics inside SOI waveguides include two-photon absorption (TPA) and free-carrier absorption (FCA) [15][16][17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Periodic compression of chirped femtosecond pulses in silicon waveguides under fourth-order dispersion

Mandeng

Fewo

Tchawoua

et al. 2014

J. Opt.

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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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“…Numerous schemes for spectral compression of broadband classical light have been demonstrated by using various compressor units and second-order nonlinear crystals. [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] Nonlinear frequency conversion could be used to generate the long narrowband pulse light, [24][25][26][27][28][29] such as sum frequency generation (SFG) in periodically poled lithium niobate (PPLN) waveguide. [30][31][32] Recently, a theoretical scheme has been proposed for spectral compression and frequency conversion of quantum light pulse.…”

Section: Introductionmentioning

confidence: 99%

Spectral compression of single-photon-level laser pulse

Xiang

Nie

et al. 2017

Sci Rep

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We experimentally demonstrate that the bandwidth of single photons laser pulse is compressed by a factor of 58 in a periodically poled lithium niobate (PPLN) waveguide chip. A positively chirped single photons laser pulse and a negatively chirped classical laser pulse are employed to produce a narrowband single photon pulse with new frequency through sum-frequency generation. In our experiment, the frequency and bandwidth of single photons at 1550 nm are simultaneously converted. Our results mark a critical step towards the realization of coherent photonic interface between quantum communication at 1550 nm and quantum memory in the near-visible window.

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Spectral compression in supercontinuum generation through the higher-order nonlinear Schrödinger equation with non-Kerr terms using subnanojoule femtosecond pulses

Cited by 14 publications

References 8 publications

Periodic compression of chirped femtosecond pulses in silicon waveguides under fourth-order dispersion

Periodic compression of chirped femtosecond pulses in silicon waveguides under fourth-order dispersion

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

Spectral compression of single-photon-level laser pulse

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