865814.fig.003a
(a)
865814.fig.003b
(b)
Figure 3: (a) Absorption spectra of Fe-MG SiO2 glasses (F1M1, F2M1, F3M1, and F4M1) and M1 glass. (b) Variation of absorbance with molar concentration of Fe-I in F M1 glasses ( ).