Abstract
Gain and phase dynamics induced by ultra-short pulse in semiconductor optical amplifiers operating in counter-propagating scheme are numerically investigated by employing a field propagation model. The numerical model accounts for the carrier depletion, carrier heating, spectral hole burning and gain dispersion. Propagating schemes have significant influences on gain and phase dynamics, especially for the ultrafast dynamics. Compared to the co-propagating, the counter-propagating causes reduced ultrafast dynamics in gain and phase dynamics. Relatively slow saturation processes in gain dynamics are observed. Analysis results show the drive currents and active lengths of semiconductor optical amplifiers are the main factors influencing the slow saturation processes.
Published Version
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