Zusammenfassung
The propagation and stability of spatiotemporal optical solitons (or
optical bullets) in a planar waveguide with periodically modulated
cubic-quintic nonlinearity is studied numerically as a function of the
amplitudes of modulation (A (m) ), the frequency of modulation (omega
(m) ) and the propagation distance z. The optical spatiotemporal
solitons are the result of the balance between the nonlinear parameters,
of dispersion (dispersion length, L (D) ) and diffraction (diffraction
length, L (d) ) with temporal and spatial auto-focusing behavior
respectively. With the objective of ensure the stability and preventing
the collapse or the spreading of pulses, in this study we explore the
cubic-quintic nonlinearity with the optical fields coupled by XPM and
take into account several values for the non linear parameter alpha and
for amplitudes (A (m) ) and frequency (omega (m) ) of modulation as a
function of the propagation distance z and we cause the collisions of
two pulses (envelope of the optical field) to ensure that the optical
pulse are solitons. After numerical analysis of parameter settings
selected four conditions and for all we get stable solitons and this
paper shown that, for a fixed amplitude and frequency of modulation we
have stable spatiotemporal solitons.
Nutzer