P. Bousselet et al., +26 dBm output power from an engineered cladding-pumped ytterbium-free EDFA for L-band WDM applications, ELECTR LETT, 36(16), 2000, pp. 1397-1399
An output power of 26dBm has been achieved with a ytterbium-free all-silica
double-clad erbium-doped fibre owing to the matching of the wavelengths of
multimode pumps with the erbium absorption spectrum.