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The performance of a high power erbium–ytterbium doped fiber amplifier (EYDFA) is investigated experimentally and theoretically. The EYDFA provides a flat gain with an output power higher than 23dBm in the wavelength region from 1541 to 1565nm using a multimode pumping at 927nm. In the theoretical analysis, the rate and power propagation equations are solved to examine the effect of fiber length on...
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