Abstract
We experimentally and theoretically demonstrate the semiconductor optical amplifier (SOA) gain recovery-time
(RT) dependence on the probe signal wavelength and power when injecting a continuous-wave high-power assist light in
the device. In our paper, pump, probe, and assist-light waves are all copropagative. Experimental and numerical
results show that the gain RT is significantly reduced over a wideband of probe wavelengths due to the assist-light
use. The reduction is more pronounced for low probe powers. A theoretical evaluation of the transparency-wavelength
dependence on both the probe wavelength and power is presented. Then, a study on assist-light power effects on the
SOA dynamics as well as pump- and probe-wavelength effects on SOA gain RT is performed.
© 2007 IEEE
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