Theoretical study of the gain equalization of a stabilized gain EDFA for WDM applications

We present a simple and efficient model which takes gain stabilization and internal filtering for gain equalization into account. This model allowed the optimization of the filter position in the doped fiber to obtain the best gain stabilization and lowest noise figure. Finally, we demonstrate that equalized and stabilized gain amplifiers are efficient devices for wavelength division multiplexing (WDM) transmissions.