On the parametric few-cycle light bullets

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Numerical simulation demonstrates that (2D+1) few-cycle (3–5 oscillations under the envelope) light bullets may form in the medium with quadratic nonlinearity and group velocity anomalous dispersion under conditions of second-harmonic generation. It is shown that as the number of oscillations under the envelope decreases, the parameters of such two-frequency solitons change.

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作者简介

K. Koshkin

Lomonosov Moscow State University

编辑信件的主要联系方式.
Email: koshkin.kv19@physics.msu.ru
俄罗斯联邦, Moscow

S. Sazonov

Lomonosov Moscow State University; National Research Centre “Kurchatov Institute”; Moscow Aviation Institute (National Research University)

Email: koshkin.kv19@physics.msu.ru
俄罗斯联邦, Moscow; Moscow; Moscow

A. Kalinovich

Lomonosov Moscow State University

Email: koshkin.kv19@physics.msu.ru
俄罗斯联邦, Moscow

M. Komissarova

Lomonosov Moscow State University

Email: koshkin.kv19@physics.msu.ru
俄罗斯联邦, Moscow

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2. Fig. 1. Spatial profile of the signal (N = 3) at the fundamental frequency for different values ​​of (a). Temporal profile of the signal (N = 3) at the fundamental frequency for different values ​​of (b).

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3. Fig. 2. Dependence of the peak intensities of signals at the fundamental frequency on the longitudinal coordinate for different N. Solid line N = 4, dashed line N = 3.2, short dashed line N = 3 (a). Dependence of the peak intensities at the fundamental frequency and at the second harmonic (solid and dashed lines, respectively) on the longitudinal coordinate for N = 3 (b).

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4. Fig. 3. Dependence of peak signal intensities at the fundamental frequency and at the second harmonic (solid upper and lower lines, respectively) on the longitudinal coordinate at N = 3. The dotted upper and lower lines are the peak intensities in the case of zero DGS at the second harmonic frequency.

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5. Fig. 4. Dependence of the DGS coefficient β1,2 on the wavelength for LiNbO3. Solid and dotted lines are the DGS at the fundamental frequency and the second harmonic, respectively.

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