Wyniki wyszukiwania - BazTech

Ograniczanie wyników

3 Computational Methods in Science and Technology

3 2008

Znaleziono wyników: 3

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Propagation Technique for Ultrashort Pulses III: Pulse Splitting of Ultrashort Pulses in a Kerr Medium

Long V. C., Viet H. N., Trippenbach M., Xuan K. D.

Computational Methods in Science and Technology

2008

Vol. 14, nr 1

21-26

Impact of such terms as third order dispersion, self-steepening and stimulated Raman scattering on evolution of ultrashort pulses is considered in detail. Under influence of these effects, pulse did not maintain its initial shape. Pulse splits into constituents, its spectrum also evolving into several bands which are known as optical shock and self-frequency shift phenomena. We concluded that when the input peak power is large enough, dynamics of pulse splitting will be complicated. Our numerical simulations were in good agreement with experimental results.

Propagation Technique for Ultrashort Pulses. II: Numerical Methods to Solve the Pulse Propagation Equation

Long V. C., Viet H. N., Trippenbach M., Xuan K. D.

Computational Methods in Science and Technology

2008

Vol. 14, nr 1

14-19

We presented the numerical technique to approximately solve the pulse propagation equation. Two efficient methods for this problem, the Split-Step Fourier and the fourth order Runge-Kutta methods are considered. Their high accuracy are shown by comparison with analytical solutions in some particular situations. Our numerical experiments are implemented for soliton propagation and interacting high order solitons. We also numerically investigate an important technique to create ultrashort pulses, which is known as the pulse compression. It is based on high order soliton propagation in Kerr media when the effect of stimulated Raman scattering is taken into account.

Propagation Technique for Ultrashort Pulses. I: Propagation Equation for Ultrashort Pulses in a Kerr Medium

Long V. C., Viet H. N., Trippenbach M., Xuan K. D.

Computational Methods in Science and Technology

2008

Vol. 14, nr 1

5-11

In this work we investigated propagation of ultrashort laser pulses in dispersive nonlinear media. We derived a general propagation equation of pulses which includes the linear and nonlinear effects to all orders. We studied in the specific case of Kerr media and obtained an ultrashort pulse propagation equation called a Generalized Nonlinear Schrödinger Equation. The impact of the third order dispersion, the higher-order nonlinear terms self-steepening, and stimulated Raman scattering are explicitly analyzed.