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Wyświetlanie 1-15 z 35
Tytuł:
Applied Magnetooptic Soliton Dynamics: TM and TE-TM-Driven Systems
Autorzy:
Boardman, A.
Xie, K.
Xie, M.
Powiązania:
https://bibliotekanauki.pl/articles/2014565.pdf
Data publikacji:
2001-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.65.Tg
Opis:
Ideas concerning the use of magnetooptic materials to control spatial solitons are introduced. It is shown that control of spatial solitons can be achieved through the use of TM modes TE-TM interactions. Potential functions can be defined through a Lagrangian analysis and optimisation is possible to facilitate energy transfer between TE and TM waves.
Źródło:
Acta Physica Polonica A; 2001, 99, 1; 7-16
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Formation of Cavity Solitons Via Vectorial Second Harmonic Generation
Autorzy:
Peschel, U.
Michaelis, D.
Etrich, C.
Lederer, F.
Powiązania:
https://bibliotekanauki.pl/articles/2008213.pdf
Data publikacji:
1999-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.65.Tg
Opis:
We demonstrate that symmetry breaking in intra-cavity vectorial second harmonic generation may cause the formation of different types of localized structures. Moving as well as resting cavity solitons are observed and the interaction between them is studied.
Źródło:
Acta Physica Polonica A; 1999, 95, 5; 727-733
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optical Beams in Nonlocal Nonlinear Media
Autorzy:
Królikowski, W.
Bang, O.
Wyller, J.
Rasmussen, J. J.
Powiązania:
https://bibliotekanauki.pl/articles/2035663.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.65.Tg
42.65.Jx
Opis:
We discuss propagation of optical beams in nonlocal Kerr-like media with the nonlocality of general form. We study the effect of nonlocality on modulational instability of the plane wave fronts, collapse of finite beams and formation of spatial solitons.
Źródło:
Acta Physica Polonica A; 2003, 103, 2-3; 133-147
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamics of χ$\text{}^{(2)}$ Solitary Waves: a Multiple Scales Approach
Autorzy:
Boardman, A. D.
Bontemps, P.
Xie, K.
Zharov, A. A.
Powiązania:
https://bibliotekanauki.pl/articles/2008211.pdf
Data publikacji:
1999-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.65.-k
42.65.Tg
Opis:
The dynamics of solitary waves in second-order nonlinear materials are discussed using a multiple scales model. After making some comments on the applicability of other perturbation techniques the multiple scales approach is developed with a view to setting up a line of approach that, in principle, permits radiative effects to be modelled. After a closure condition is applied, equations for the evolution of dynamical variables are developed. Applications of these equations to loss and interactions are presented together with confirmation from numerical simulations. It is emphasised that the method is capable of extension to higher-order perturbations and, hence, into the solitary wave fusion region. The established interpretation of quasi-phase-matching fluctuations as loss is discussed and the simple problems of soliton (solitary wave) pair interactions in both loss-free and lossy media are analysed.
Źródło:
Acta Physica Polonica A; 1999, 95, 5; 705-718
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
"Necklace-Ring" Beams in Saturable Kerr Media with Square-Root Nonlinearity
Autorzy:
Petrović, M. S.
Powiązania:
https://bibliotekanauki.pl/articles/2047852.pdf
Data publikacji:
2007-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.65.Tg
42.65.Sf
Opis:
Analytical and numerical investigation of the propagation of "necklace-ring" optical beams in Kerr-like saturable photorefractive media with square-root nonlinearity is carried out. Analytic expression for the propagation dynamics of the necklace beams is in good agreement with numerical findings.
Źródło:
Acta Physica Polonica A; 2007, 112, 5; 921-925
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Propagation effects in superfluorescence
Autorzy:
Michalska-Trautman, R.
Powiązania:
https://bibliotekanauki.pl/articles/1075590.pdf
Data publikacji:
2016-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.65.Sf
42.65.Tg
Opis:
The evolution of a superfluorescent pulse is studied in the region of large sample lengths. A solution to the Maxwell-Bloch semiclassical equations is found by using the inverse scattering method. It has the form of a one-soliton solution with varying parameters. Dependence on the pulse width and the retarded time is found without further approximations. These parameters are shown to be independent of the inhomogeneous broadening time. Their values are in good agreement with experiment. Asymmetry of the pulse is also investigated.
Źródło:
Acta Physica Polonica A; 2016, 130, 3; 734-736
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dancing Light: Counterpropagating Beams in Photorefractive Crystals
Autorzy:
Belić, M.
Petrović, M.
Jović, D.
Strinić, A.
Arsenović, D.
Prvanović, S.
Jovanović, R.
Petrović, N.
Powiązania:
https://bibliotekanauki.pl/articles/1814046.pdf
Data publikacji:
2007-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.65.Tg
42.65.Sf
Opis:
A review of work on the dynamical behavior of counterpropagating incoherent laser beams in photorefractive crystals is presented. Numerical study of counterpropagating beams of different type is carried out, in both space and time, using an appropriate theoretical model. The development of patterns in broad hyper-Gaussian counterpropagating beams in saturable Kerr-like media is investigated, by varying the width of beams. Rotational properties of counterpropagating mutually incoherent self-trapped vortex beams in optically induced fixed photonic lattices are also investigated numerically. One of the fundamental quantum mechanical phenomena is observed for the counterpropagating beams in photonic lattices, the tunneling of light from the first to the higher-order bands of the lattice band gap spectrum. The transfer of angular momentum from vortex beams to optically induced photonic lattices is also demonstrated. For the interacting beams it is found that the sum of angular momenta of counterpropagating components is not a conserved quantity, but the difference is. In the fixed lattices there is always a considerable loss of angular momentum.
Źródło:
Acta Physica Polonica A; 2007, 112, 5; 729-736
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dissipative Optical Solitons
Autorzy:
Skarka, V.
Aleksic, N.
Powiązania:
https://bibliotekanauki.pl/articles/1814360.pdf
Data publikacji:
2007-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.65.Sf
42.65.Tg
Opis:
The generation and nonlinear dynamics of multi-dimensional optical dissipative solitonic pulses are examined. The variational method is extended to complex dissipative systems, in order to obtain steady state solutions of the one-, two-, and three-dimensional complex cubic-quintic Ginzburg-Landau equation. A stability criterion is established fixing a domain of dissipative parameters for stable steady state solutions. Following numerical simulations, evolution of even asymmetric input pulse from this domain leads to stable dissipative solitons and light bullets.
Źródło:
Acta Physica Polonica A; 2007, 112, 5; 791-798
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spinning Optical Spatiotemporal Solitons in Quadratic Media
Autorzy:
Mihalache, D.
Powiązania:
https://bibliotekanauki.pl/articles/2015065.pdf
Data publikacji:
2001-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.65.Tg
42.65.Sf
Opis:
The unique features of the families of bright spinning spatiotemporal solitons (doughnuts or vortex light bullets) in dispersive quadratic media, including their stability, are presented. Both analytical results, obtained by means of a simple variational approximation, and numerical simulations are presented and compared. It was found that though the variational approximation is not very accurate, it correctly describes the qualitative features of the spinning spatiotemporal solitons. The spinning light bullets are subject to a strong azimuthal instability, which leads to the break-up of the spinning soliton into a set of fragments, each being a stable nonspinning spatiotemporal soliton.
Źródło:
Acta Physica Polonica A; 2001, 99, 1; 47-56
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi-Component Spatial Optical Solitons in Photorefractive Medium
Autorzy:
Królikowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/2015077.pdf
Data publikacji:
2001-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.65.Tg
42.65.Hw
Opis:
We discuss properties of one- and two-dimensional multi-component spatial solitons. We present our recent results on formation and interaction of these solitons in photorefractive nonlinear crystal.
Źródło:
Acta Physica Polonica A; 2001, 99, 1; 67-76
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Propagation of TE Waves in Nonlinear Waveguide
Autorzy:
Żegliński, G.
Wabia, M.
Powiązania:
https://bibliotekanauki.pl/articles/2015106.pdf
Data publikacji:
2001-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.65.-k
42.65.Tg
Opis:
In the paper numerical calculations of the results of propagation in a nonlinear planar waveguide are performed. A type of nonlinearity is the Kerr nonlinearity. The wave equation, the solution of wave equation are shown, the dispersion equation, and the numerical solution of dispersion equation are analysed.
Źródło:
Acta Physica Polonica A; 2001, 99, 1; 111-118
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Finding Solitons in Bifurcations of Stationary Solutions of Complex Ginzburg-Landau Equation
Autorzy:
Timotijevic, D. V.
Derbazi, M.
Skarka, V.
Powiązania:
https://bibliotekanauki.pl/articles/2047837.pdf
Data publikacji:
2007-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.65.Sf
42.65.Tg
Opis:
Nonlinear dissipative systems, particularly optical dissipative solitons are well described by complex Ginzburg-Landau equation. Solutions of two- and three-dimensional complex cubic-quintic Ginzburg-Landau equation assuming exponential dependence on propagation parameter are studied. Approximate analytical stationary solutions of cubic-quintic Ginzburg-Landau equation are found by solving systems of ordinary differential equations. We are solving two-point boundary problems using adapted shooting method. Stable and unstable branches of the bifurcation diagram are identified using linear stability analysis. In this way we established conditions for generation and propagation of stable dissipative solitons in two and three dimensions. These results are in agreement with numerical simulation of cubic-quintic Ginzburg-Landau equation and the recently established approach based on variational method generalized to dissipative systems and therein established stability criterion.
Źródło:
Acta Physica Polonica A; 2007, 112, 5; 853-858
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gaussian-Induced Rotation in Triangular Photonic Lattices
Autorzy:
Jović, D.
Prvanović, S.
Jovanović, R.
Petrović, M.
Powiązania:
https://bibliotekanauki.pl/articles/2047884.pdf
Data publikacji:
2007-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.65.Tg
42.65.Sf
Opis:
Time-dependent rotation of counterpropagating mutually incoherent self-trapped Gaussian beams in periodic optically induced fixed photonic lattices is numerically investigated. Rotation occurs for some values of control parameters. For parameters of such rotation, the solitonic solutions are found using modified Petviashvili's method. It is shown that they correspond to the lowest values of propagation constant in the power diagrams and relation between observed rotation and less confined discrete solitonic solutions are demonstrated.
Źródło:
Acta Physica Polonica A; 2007, 112, 5; 1067-1072
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Grey Solitons in Saturable Media with Nonlinear Dispersion and Self-Frequency Shift
Autorzy:
Jasiński, J.
Powiązania:
https://bibliotekanauki.pl/articles/2035664.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.65.Tg
42.82.Et
Opis:
In the paper a special form of the generalized nonlinear Schrödinger equation in saturable medium with nonlinear dispersion and the self-frequency shift terms is considered. The solutions describing both the intensity and phase profiles of grey solitons propagating in this medium are obtained. Four cases of medium with or without saturation and with or without higher order terms are considered. For a square-two-level model of saturation analytical explicit solutions are derived. The relations between the medium and propagation parameters of solitons are discussed.
Źródło:
Acta Physica Polonica A; 2003, 103, 2-3; 149-160
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bright and Dark Solitons in Generalized Kerr-Like Media
Autorzy:
Jasiński, J.
Powiązania:
https://bibliotekanauki.pl/articles/2015082.pdf
Data publikacji:
2001-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.65.Tg
42.82.Et
Opis:
In the paper the propagation of short pulses in nonlinear Kerr-like medium is considered. Pulses are described by the nonlinear Schrödinger equation in which the generalization of nonlinear dispersion term and the self-frequency shift are taken into account. The solution of the equation in the form of quadrature is derived. Both the phase and profile of the pulse intensity are obtained. The cases of propagating bright and dark solitons in saturable Kerr-like medium are analyzed. Two models of saturation are considered. The explicit analytical expressions describing the Kerr limit are reported. The relations between the medium and propagation parameters are thoroughly discussed.
Źródło:
Acta Physica Polonica A; 2001, 99, 1; 77-86
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
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