Silicate glasses doped Er and codoped
(Erbium—doped Optical Glass Waveguide Amplifiers)．
Er’ ／Yb¨ were fabricated
， which were applied to EDW A
Absorption spectra properties show that peak position of glass
doped with different Er2O3 concentration are basically saine
，however， of the same wavelength is diferent：A％
is increasing with the increasing of Er2 O3 concentration ；a larger ab sorption cross section is observed bec￡u】se 0f
adding Yb2 O3 as sensitizer．Analysis of fluorescence spectra shows that full width at half maximum(FWHM)was
reduced from 80 nm to 40 nm with the increasing of doped Er2 O3 concentration． Therefore，the better doped
concentration of Er2 03 was ab out 0．2 too1％ ．
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