The evolution properties of the self-similar parabolic pulse(similariton) with higher-order effects in microstructured fiber
amplifier with normal group-velocity dispersion are investigated in this paper. The numerical results show that the
higher-order effects greatly distort similariton's waveform, frequency and the linearity of chirp. The drift of pulse center
increases with distance. The influence of different higher-order effects on similariton is analyzed. High quality
propagation of similariton can be attained by manipulating the geometrical parameters of the microstructured fiber
amplifier. These results are significant in the further study of similariton propagation in high-power ultrashort fiber
amplifier, laser and transmission system.
Self-similar pulse propagation properties in Yb+3-doped fiber amplifiers with the effects of higher-order
dispersion and gain dispersion have been studied in this paper. The effects of initial pulse energy, third-order
dispersion and the doped ions dipole relaxation time on the pulse propagation quality are relatively expounded
with the analytical and simulative methods. It is shown that with nonlinear area of parabolic pulses being enlarged,
the center of chirp moves forward or backward, due to the difference of third-order dispersion coefficient. And the
figure of pulses is distorted with the pulse peak delaying to one side and the center location excursing. Gain
dispersion can be a filter, which can properly compress pulse-width. Results proved the possibility of the
self-similar pulse existing in gain medium with a certain relaxation time.
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