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TEM images of the (a) as prepared (average particle size is 12 nm) and (b) FESEM image of the : Er∕6F composite film.
Absorption spectrum of : Er∕6F composite film of thickness 0.8 mm. The inset shows the near-infrared absorption bands.
Emission spectra of in ∕6F composite both in colloidal suspension and nanocomposite form. The inset shows the decay of the emission observed in the nanocomposite sample.
Predicted optical gain behavior as a function of the pump power.
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