We experimentally and theoretically demonstrate the SOA gain recovery time dependency on the probe signal wavelength and power, when injecting a continuous wave (CW) high power assist light in the device. In our study, pump, probe and assist light waves are all co-propagative. Experimental and numerical results show that the gain recovery time 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 dependency 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 wavelengths effects on SOA gain recovery time is performed.